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Python 3.11新機能
asyncio.TaskGroupと
2022年 asyncioの “Hello-ish world”
Junya Fukuda
PyCon JP 2022
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•ా ൏ʢJunya Fukudaʣʢ@JunyaFffʣ
•גࣜձࣾຊγεςϜٕݚʢJSLʣॴଐ ݝͷձࣾ
•WebΤϯδχΞ
•GEEKLAB.NAGANO - ίϛϡχςΟεϖʔεӡӦ
•ʢ͓͠͝ͱͰʣόϦϡʔϒοΫε
•ຊ͖ʹѪ͞ΕΔαʔϏεΛࢦͯ͠ʢݹຊങऔɾൢചʣ
•GEEKLAB.NAGANO - ίϛϡχςΟεϖʔεӡӦ
ຊͷίʔυͪ͜Β
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Python実践
•20221݄ൃച ٕज़ධࣾ
•Python 3 ΤϯδχΞೝఆ࣮ફࢼݧ ओڭࡐ
•2ʹ͓͢͢Ίʂࣙॻతʹ͍ͬͯ͋͛ͯͩ͘͞ʂ
• ҎԼͷষΛ୲͍ͯ͠·͢
• Chapter2 ίʔσΟϯάن
• Chapter5 ܕώϯτ
• Chapter19 ฒߦॲཧɼฒྻॲཧ
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きょうはasyncioの新しい機能と
新しい “Hello-ish world”
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asyncio、使っていますか？✋
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ありがとうございます。
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ですよね。
なぜ使わないのでしょうか？
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- asyncio 基本
•ඇಉظॲཧͷίʔυΛॻͨ͘ΊͷެࣜϥΠϒϥϦ
•ෳͷλεΫΛಉ࣌ʹॲཧ͢Δ
•I/OόϯυͳॲཧʢDBΞΫηε/HTTPϦΫΤετͳͲʣͰޮՌΛൃش
•֎෦API-A, ֎෦API-B, ֎෦API-C Λಉ࣌ʹ࣮ߦ͍ͨ͠
•ಉظॲཧͩͱ ॱ൪ʹ࣮ߦ
" # $
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- asyncio 基本
•ඇಉظॲཧͷίʔυΛॻͨ͘ΊͷެࣜϥΠϒϥϦ
•ෳͷλεΫΛಉ࣌ʹॲཧ͢Δ
•I/OόϯυͳॲཧʢDBΞΫηε/HTTPϦΫΤετͳͲʣͰޮՌΛൃش
•֎෦API-A, ֎෦API-B, ֎෦API-C Λಉ࣌ʹ࣮ߦ͍ͨ͠
•ඇಉظॲཧͩͱ ·ͱΊͯಉ࣌ʹ࣮ߦ
C
B
A
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- asyncio 基本
•ඇಉظॲཧͷίʔυΛॻͨ͘ΊͷެࣜϥΠϒϥϦ
•ຖόʔδϣϯਐԽ ߴϨϕϧAPI͕ॆ࣮ - ͱͯॻ͖͍͢
•ຊPyCon JP 2021ͰͦΜͳτʔΫΛ͍͖ͤͯͨͩͨ͞·ͨ͠ɻͥͻʂ
"4(*ΞϓϦέʔγϣϯೖ͜Θ͘ͳ͍BTZODJPجૅͱඇಉظ*0'BTU"1*Λྫʹ
1Z$PO+1
•ෳͷλεΫΛಉ࣌ʹॲཧ͢Δ
•I/OόϯυͳॲཧʢDBΞΫηε/HTTPϦΫΤετͳͲʣͰޮՌΛൃش
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🤔
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asyncio 使 理由 考
•׳ΕͯΔಉظॲཧͰे
•IO͕ͳ͍ʢػցֶशσʔλੳ͕த৺ʣʢCPUʹ͕ΜΒͤΔ͜ͱଟ͍ʣ
•ඇಉظॲཧͬͯɺ༧ଌͰ͖ͳ͍ಈ͖Λͦ͠͏
•ଞͷݴޠͰॻ͍ͪΌ͏ʢGoJS(nodejs/deno..),Rust,C#,SwiftͳͲʣ
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asyncio 使 理由 考
•׳ΕͯΔಉظॲཧͰे
•IO͕ͳ͍ʢػցֶशσʔλੳ͕த৺ʣʢCPUʹ͕ΜΒͤΔ͜ͱଟ͍ʣ
•ඇಉظॲཧͬͯɺ༧ଌͰ͖ͳ͍ಈ͖Λͦ͠͏
•ଞͷݴޠͰॻ͍ͪΌ͏ʢGoJS(nodejs/deno..),Rust,C#,SwiftͳͲʣ
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asyncio 使 理由 考
•׳ΕͯΔಉظॲཧͰे
•IO͕ͳ͍ʢػցֶशσʔλੳ͕த৺ʣʢCPUʹ͕ΜΒͤΔ͜ͱଟ͍ʣ
•ඇಉظॲཧͬͯɺ༧ଌͰ͖ͳ͍ಈ͖Λͦ͠͏
•ଞͷݴޠͰॻ͍ͪΌ͏ʢGoJS(nodejs/deno..),Rust,C#,SwiftͳͲʣ
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asyncio 使 理由 考
•׳ΕͯΔಉظॲཧͰे
•IO͕ͳ͍ʢػցֶशσʔλੳ͕த৺ʣʢCPUʹ͕ΜΒͤΔ͜ͱଟ͍ʣ
•ඇಉظॲཧͬͯɺ༧ଌͰ͖ͳ͍ಈ͖Λͦ͠͏
•ଞͷݴޠͰॻ͍ͪΌ͏ʢGoJS(nodejs/deno..),Rust,C#,SwiftͳͲʣ
݁ہཁ݅ʹΑΓͦ͏
ͰWebͰ͋ΕI/Oͷմ
asyncioͰ࡞ͬͯΑ͍͔
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asyncio 使 理由 考
•׳ΕͯΔಉظॲཧͰे
•IO͕ͳ͍ʢػցֶशσʔλੳ͕த৺ʣʢCPUʹ͕ΜΒͤΔ͜ͱଟ͍ʣ
•ඇಉظॲཧͬͯɺ༧ଌͰ͖ͳ͍ಈ͖Λͦ͠͏
•ଞͷݴޠͰॻ͍ͪΌ͏ʢGoJS(nodejs/deno..),Rust,C#,SwiftͳͲʣ
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asyncio 使 ？
•͔֬ʹͦΕͦ͏
•JavaScriptͰͷίʔϧόοΫͱ͔ʢ͕ͦͬͪಈ͘Μ͔͍ͬʣ
•Έͳ͞Μܦݧ͋Δ͔ʁ
•ͨ·ͨྫ֎ىͬͨ࣌͜ɺͲ͏ͳΔΜͩΖ͏…
•εϨουϚϧνϓϩηεͰͷܦݧ
•ඇಉظॲཧͬͯɺ༧ଌͰ͖ͳ͍ಈ͖Λͦ͠͏
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「この処理、
例外起こるとどうなります？」
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「この処理、
例外起こるとどうなります？」
ϨϏϡʔͰݴ͏͜ͱɾݴΘΕΔ͜ͱ͋Γ·ͤΜ͔ʁ
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asyncio 使 ？
•ඇಉظॲཧͬͯɺ༧ଌͰ͖ͳ͍ಈ͖Λͦ͠͏
•͔֬ʹͦΕͦ͏
•༧ଌͰ͖ͳ͍ಈ͖Λͦ͠͏
•ྫ֎ىͬͨ࣌͜ɺͲ͏ͳΔͷ͔͔Βͳ͍
•ʮ͜ͷฒߦʹಈ͍ͯΔλεΫɺexceptͨ͠ΒͲ͏ͳΔͷʁʯ
•ྫ֎ൃੜ࣌ɺଞͷλεΫ͍͍ͬͨ…
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asyncio 使 ？
•ඇಉظॲཧͬͯɺ༧ଌͰ͖ͳ͍ಈ͖Λͦ͠͏
•͔֬ʹͦΕͦ͏
•༧ଌͰ͖ͳ͍ಈ͖Λͦ͠͏
•ྫ֎ىͬͨ࣌͜ɺͲ͏ͳΔͷ͔͔Βͳ͍
•ʮ͜ͷฒߦʹಈ͍ͯΔλεΫɺexceptͨ͠ΒͲ͏ͳΔͷʁʯ
•ྫ֎ൃੜ࣌ɺଞͷλεΫ͍͍ͬͨ…
•͜ΕΛղܾͯ͘͠ΕΔ৽ػೳ
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asyncio.TaskGroup
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asyncio.TaskGroup
例外・キャンセル
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本⽇
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本⽇
•asyncioΛར༻͢Δ্Ͱͷྫ֎ॲཧɾΩϟϯηϧ
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本⽇
•asyncioΛར༻͢Δ্Ͱͷྫ֎ॲཧɾΩϟϯηϧ
•͍··ͰʢPython 3.10Ҏલʣͱ͜Ε͔ΒʢPython 3.11ʣΛͦΕͧΕ
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本⽇
•asyncioΛར༻͢Δ্Ͱͷྫ֎ॲཧɾΩϟϯηϧ
•͍··ͰʢPython 3.10Ҏલʣͱ͜Ε͔ΒʢPython 3.11ʣΛͦΕͧΕ
•ྫ֎͜Μͳʹ؆୯ʹॻ͚ΔΜͩʂ
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本⽇
•asyncioΛར༻͢Δ্Ͱͷྫ֎ॲཧɾΩϟϯηϧ
•͍··ͰʢPython 3.10Ҏલʣͱ͜Ε͔ΒʢPython 3.11ʣΛͦΕͧΕ
•ྫ֎͜Μͳʹ؆୯ʹॻ͚ΔΜͩʂ
•Ωϟϯηϧͬͯ͜͏ͳͬͯΔΜͩ
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本⽇
•asyncioΛར༻͢Δ্Ͱͷྫ֎ॲཧɾΩϟϯηϧ
•͍··ͰʢPython 3.10Ҏલʣͱ͜Ε͔ΒʢPython 3.11ʣΛͦΕͧΕ
•ྫ֎͜Μͳʹ؆୯ʹॻ͚ΔΜͩʂ
•Ωϟϯηϧͬͯ͜͏ͳͬͯΔΜͩ
•asyncio.TaskGroup ࢼͯ͠ΈΑ͏ʙ
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本⽇
•asyncioΛར༻͢Δ্Ͱͷྫ֎ॲཧɾΩϟϯηϧ
•͍··ͰʢPython 3.10Ҏલʣͱ͜Ε͔ΒʢPython 3.11ʣΛͦΕͧΕ
•ྫ֎͜Μͳʹ؆୯ʹॻ͚ΔΜͩʂ
•Ωϟϯηϧͬͯ͜͏ͳͬͯΔΜͩ
•ʮ༧ଌՄೳʯͰʮ҆શʯͳasyncioͷॻ͖ํ
•asyncio.TaskGroup ࢼͯ͠ΈΑ͏ʙ
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本⽇
•asyncioΛར༻͢Δ্Ͱͷྫ֎ॲཧɾΩϟϯηϧ
•͍··ͰʢPython 3.10Ҏલʣͱ͜Ε͔ΒʢPython 3.11ʣΛͦΕͧΕ
•ྫ֎͜Μͳʹ؆୯ʹॻ͚ΔΜͩʂ
•Ωϟϯηϧͬͯ͜͏ͳͬͯΔΜͩ
•ʮ༧ଌՄೳʯͰʮ҆શʯͳasyncioͷॻ͖ํ
•৽͍͠ఆ൪ͱͳΔ “Hello-ish world”
•asyncio.TaskGroup ࢼͯ͠ΈΑ͏ʙ
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（ 話 ？）
•େ͖͘2ͭ
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（ 話 ？）
•େ͖͘2ͭ
•Python Core Developer Yury SelivanovࢯͷπΠʔτʢasync/await ͷAuthorʣ
•Taskgroup͕merge͞Εͨ࣌ʹڵฃͷπΠʔτΛ࿈͍ͯͨ͠
•υΩϡϝϯτಡΜͰΑ͔͘Βͳ͍
•ͳʹ͕ͦΜͳʹ͍͍ͷ͔͠Β…🤔
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（ 話 ？）
•͓ੈʹͳ͍ͬͯΔେ͖ͳຊʮUsing Asyncio in Pythonʯ
•͔Βͳ͍ίʔυ͕͋ͬͨ
•େ͖͘2ͭ
•Quickstart - Example 3-2.
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•Quickstart - Example 3-2.
import asyncio
import time
async def main():
print(f"{time.ctime()} Hello!")
await asyncio.sleep(1.0)
print(f"{time.ctime()} GoodBye!")
loop = asyncio.get_event_loop()
task = loop.create_task(main())
loop.run_until_complete(task)
pending = asyncio.all_tasks(loop=loop)
for task in pending:
task.cancel()
group = asyncio.gather(*pending, return_exceptions=True)
loop.run_until_complete(group)
loop.close()
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（ 話 ？）
•͓ੈʹͳ͍ͬͯΔຊʮUsing Asyncio in Pythonʯ
•͔Βͳ͍ίʔυ͕͋ͬͨ
•େ͖͘2ͭ
•Quickstart - Example 3-2.
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（ 話 ？）
•͓ੈʹͳ͍ͬͯΔຊʮUsing Asyncio in Pythonʯ
•͔Βͳ͍ίʔυ͕͋ͬͨ
•େ͖͘2ͭ
•Quickstart - Example 3-2.
The “Hello-ish World” of Asyncio
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（ 話 ？）
•͓ੈʹͳ͍ͬͯΔຊʮUsing Asyncio in Pythonʯ
•͔Βͳ͍ίʔυ͕͋ͬͨ
•େ͖͘2ͭ
•Quickstart - Example 3-2.
The “Hello-ish World” of Asyncio
•͜ͷίʔυΛ asyncio.TaskGroupͰ৽͍ͨ͠
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話 ・話
•͢͜ͱ
•asyncioͰͷྫ֎ॲཧʢ৽ߏจ except*ʣ
•λεΫͷΩϟϯηϧ
•asyncioͷ৽͍͠ϋϩʔϫʔϧυ
•͞ͳ͍͜ͱ
•asyncioͷجຊͷͳ͠
•ΞϓϦέʔγϣϯͰ۩ମྫ
•ASGIͰͷͳ͠
ίʔυͪ͜Β
IUUQTHJUIVCDPNKSGLUBML
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注意！
•Python 3.11·ͩϦϦʔε͞Ε͍ͯͳ͍ʂ
•10݄3ϦϦʔε༧ఆͰ͕ͨ͠ɺݱࡏ10݄24༧ఆʹͳ͍ͬͯΔ
•ಈ࡞֬ೝPython 3.11.0rc2
IUUQTQFQTQZUIPOPSHQFQ
•ͳ͍ͱࢥ͍·͕͢ɺasyncio.TaskGroup͕ເͷػೳʹՄೳੑθϩͰ…
•͜ͷτʔΫɺΈͳ͞·ͷ৺͔Βফ͑ΔΈʹͳ͍ͬͯ·͢ɻ
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asyncio.TaskGroup
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asyncio.TaskGroup
•asyncio.TaskGroupͷػೳ
•ෳͷλεΫΛ·ͱΊͯಉ࣌ʹॲཧ͢Δ
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asyncio.TaskGroup
•asyncio.TaskGroupͷػೳ
•ෳͷλεΫΛ·ͱΊͯಉ࣌ʹॲཧ͢Δ
•Python 3.10Ҏલʹಉ༷ͷػೳ͕͋Δ
•asyncio.gather()asyncio.wait() ͳͲ
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asyncio.TaskGroup
•asyncio.TaskGroupͷػೳ
•ෳͷλεΫΛ·ͱΊͯಉ࣌ʹॲཧ͢Δ
•Python 3.10Ҏલʹಉ༷ͷػೳ͕͋Δ
•asyncio.gather()asyncio.wait() ͳͲ
•·ͣެࣜυΩϡϝϯτ͔ΒݟͯΈ·͠ΐ͏
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import asyncio
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(some_coro(...))
task2 = tg.create_task(another_coro(...))
print("Both tasks have completed now.")
asycio.TaskGroup
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import asyncio
async def main():
await asyncio.gather(
some_coro(...),
another_coro(...)
)
print("Both tasks have completed now.")
asycio.TaskGroup
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•asyncio.TaskGroupͷಛ
•ෳͷλεΫΛ·ͱΊͯॲཧ͢Δ
•Python 3.10Ҏલʹ͋Δ
•asyncio.gather()asyncio.wait()
•ͦΕΒͱҟͳΔɺେ͖ͳಛ͕2ͭ͋Δ
asycio.TaskGroup
•ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ
•ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
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•ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ
•ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
asycio.TaskGroup 特徴
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•ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ
•ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
asycio.TaskGroup 特徴
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•ෳͷλεΫΛ·ͱΊͯॲཧ͢Δ
ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ
•વɺྫ֎ಉ࣌ʹൃੜ͢Δ߹͕͋Δ
•Python 3.10ҎલͰͲ͏ͬͯัଊ͢Δͷ͔ݟͯΈ·͠ΐ͏
•Python 3.7ͰՃ͞ΕͨߴϨϕϧAPI asyncio.gather() Λར༻
•asyncio.gather() ʹྫ֎ʹؔ͢ΔΦϓγϣϯʮreturn_exceptionsʯ
•return_exceptions ࢦఆͳ͠
•return_exceptions ࢦఆ͋Γ
•ࢦఆͨ͠λεΫʢඇಉظؔʣΛಉ࣌ʹ࣮ߦ
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•ಉ࣌ʹ࣮ߦ͢ΔඇಉظؔΛ༻ҙ - asycn def Ͱఆٛ͢Δίϧʔνϯ 3ͭ༻ҙ
ࣄલ४උ
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•ಉ࣌ʹ࣮ߦ͢ΔඇಉظؔΛ༻ҙ - asycn def Ͱఆٛ͢Δίϧʔνϯ 3ͭ༻ҙ
ࣄલ४උ
import asyncio
async def coro_success():
return "ޭ"
async def coro_value_err():
raise ValueError
async def coro_type_err():
raise TypeError
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•asyncio.gather - return_exceptions ࢦఆͳ͠
•asyncio.gather - return_exceptions ࢦఆ͋Γ
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•asyncio.gather - return_exceptions ࢦఆͳ͠
•asyncio.gather - return_exceptions ࢦఆ͋Γ
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asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}")
asyncio.run(main())
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}")
asyncio.run(main())
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}")
asyncio.run(main())
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆͳ͠
$ python310 1_asyncio_gather_except.py
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}")
asyncio.run(main())
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆͳ͠
$ python310 1_asyncio_gather_except.py
err=ValueError()
$ python310
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}")
asyncio.run(main())
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆͳ͠
$ python310 1_asyncio_gather_except.py
err=ValueError()
$ python310
ValueErrorͷΈ
TypeErrorัଊͰ͖ͳ͍
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}")
asyncio.run(main())
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆͳ͠
$ python310 1_asyncio_gather_except.py
err=ValueError()
$ python310
ValueErrorͷΈ
TypeErrorัଊͰ͖ͳ͍
࠷ॳͷྫ֎ͷΈัଊ
͋ͱѲΓͭͿ͠·͢
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}")
asyncio.run(main())
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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•asyncio.gather - return_exceptions ࢦఆͳ͠
•asyncio.gather - return_exceptions ࢦఆ͋Γ
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•asyncio.gather - return_exceptions ࢦఆͳ͠
•asyncio.gather - return_exceptions ࢦఆ͋Γ
return_exceptions ࢦఆ͋Γͷ߹ɺ
ͯ͢ͷλεΫΛ࣮ߦͨ͠ޙʹ݁ՌΛϦετͰऔಘ͢Δ
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•asyncio.gather - return_exceptions ࢦఆͳ͠
•asyncio.gather - return_exceptions ࢦఆ͋Γ
return_exceptions ࢦఆ͋Γͷ߹ɺ
ͯ͢ͷλεΫΛ࣮ߦͨ͠ޙʹ݁ՌΛϦετͰऔಘ͢Δ
ΓͷϦετΛνΣοΫ͢Δඞཁ͕͋Δ
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asyncio.gather - return_exceptions ࢦఆ͋Γ
async def main():
"""return_exceptions=True͋Γ"""
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err(),
return_exceptions=True)
print(f"{results=}")
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆ͋Γ
async def main():
"""return_exceptions=True͋Γ"""
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err(),
return_exceptions=True)
print(f"{results=}")
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆ͋Γ
async def main():
"""return_exceptions=True͋Γ"""
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err(),
return_exceptions=True)
print(f"{results=}")
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆ͋Γ
$ python310 2_asyncio_gather_except_true.py
async def main():
"""return_exceptions=True͋Γ"""
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err(),
return_exceptions=True)
print(f"{results=}")
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆ͋Γ
$ python310 2_asyncio_gather_except_true.py
async def main():
"""return_exceptions=True͋Γ"""
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err(),
return_exceptions=True)
print(f"{results=}")
results=['ޭ', ValueError(), TypeError()]
$ python310
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆ͋Γ
$ python310 2_asyncio_gather_except_true.py
async def main():
"""return_exceptions=True͋Γ"""
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err(),
return_exceptions=True)
print(f"{results=}")
results=['ޭ', ValueError(), TypeError()]
$ python310
ͯ͢ͷ݁ՌΛϦετͰऔಘ
ͲΜͳྫ֎͕ൃੜ͔ͨ֬͠ೝ͕ඞཁ
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆ͋Γ
for result in results:
match result:
case ValueError():
print("ValueError")
case TypeError():
print("TypeError")
async def main():
"""return_exceptions=True͋Γ"""
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err(),
return_exceptions=True)
print(f"{results=}")
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆ͋Γ
for result in results:
match result:
case ValueError():
print("ValueError")
case TypeError():
print("TypeError")
async def main():
"""return_exceptions=True͋Γ"""
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err(),
return_exceptions=True)
print(f"{results=}")
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆ͋Γ
$ python310 2_asyncio_gather_except_true.py
async def main():
"""return_exceptions=True͋Γ"""
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err(),
return_exceptions=True)
print(f"{results=}")
for result in results:
match result:
case ValueError():
print("ValueError")
case TypeError():
print("TypeError")
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆ͋Γ
$ python310 2_asyncio_gather_except_true.py
async def main():
"""return_exceptions=True͋Γ"""
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err(),
return_exceptions=True)
print(f"{results=}")
results=['ޭ', ValueError(), TypeError()]
ValueError()
for result in results:
match result:
case ValueError():
print("ValueError")
case TypeError():
print("TypeError")
TypeError()
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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asyncio.gather - return_exceptions ࢦఆ͋Γ
$ python310 2_asyncio_gather_except_true.py
async def main():
"""return_exceptions=True͋Γ"""
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_type_err(),
return_exceptions=True)
print(f"{results=}")
results=['ޭ', ValueError(), TypeError()]
ValueError()
for result in results:
match result:
case ValueError():
print("ValueError")
case TypeError():
print("TypeError")
TypeError()
݁ՌͷνΣοΫ͕ඞཁ
ͯ͢ͷλεΫͷ࣮ߦ͕ඞཁ
ಉ࣌ʹൃੜ͢Δྫ֎ͷัଊ
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ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ Python 3.10Ҏલͷ՝
•asyncio.gather() ʹྫ֎ʹؔ͢ΔΦϓγϣϯʮreturn_exceptionsʯ
•return_exceptions ࢦఆͳ͠
•return_exceptions ࢦఆ͋Γ
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ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ Python 3.10Ҏલͷ՝
•࠷ॳͷྫ֎Ҏ֎ัଊͰ͖ͳ͍
•ൃੜͨ͠ྫ֎Λͯ͢هͰ͖ͳ͍
•ΓͷϦετΛνΣοΫ͢Δඞཁ͕͋Δ
•ͯ͢ͷλεΫΛ࣮ߦ͠ͳ͚ΕͳΒͳ͍
•ͨͱ͑ɺ10ݸͷHTTPϦΫΤετΛಉ࣌ʹߦ͏ॲཧ
•࠷ॳͷλεΫʹྫ֎͕ൃੜ
•Γͷࣦഊ͢Δ͔͠Εͳ͍9͕ͭྃ͢Δ·Ͱͭ͜ͱʹͳΔ
ʢ݁Ռ10ݸ͕ͯ͢ಉ͡Τϥʔʹͳͬͨͱͯ͠Ͱ͢ʣ
•return_exceptions ࢦఆͳ͠
•return_exceptions ࢦఆ͋Γ
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ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ Python 3.10Ҏલͷ՝
•࠷ॳͷྫ֎Ҏ֎ัଊͰ͖ͳ͍
•ൃੜͨ͠ྫ֎Λͯ͢هͰ͖ͳ͍
•ΓͷϦετΛνΣοΫ͢Δඞཁ͕͋Δ
•ͯ͢ͷλεΫΛ࣮ߦ͠ͳ͚ΕͳΒͳ͍
•return_exceptions ࢦఆͳ͠
•return_exceptions ࢦఆ͋Γ
•ղܾ͢Δͷ͕ɺasyncio.TaskGroupͱ৽ߏจʮexcept*ʯ
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•ಉ࣌ʹ࣮ߦ͢ΔඇಉظؔΛ༻ҙ - asycn def Ͱఆٛ͢Δίϧʔνϯ 3ͭ༻ҙ
ࣄલ४උ - มߋͳ͠
import asyncio
async def coro_success():
return "ޭ"
async def coro_value_err():
raise ValueError
async def coro_type_err():
raise TypeError
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async def main():
asycio.TaskGroup 例外捕捉
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(coro_success())
task2 = tg.create_task(coro_value_err())
task3 = tg.create_task(coro_type_err())
results = [task1.result(), task2.result(), task3.result()]
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asycio.TaskGroup 例外捕捉
try:
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(coro_success())
task2 = tg.create_task(coro_value_err())
task3 = tg.create_task(coro_type_err())
results = [task1.result(), task2.result(), task3.result()]
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asycio.TaskGroup 例外捕捉
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(coro_success())
task2 = tg.create_task(coro_value_err())
task3 = tg.create_task(coro_type_err())
results = [task1.result(), task2.result(), task3.result()]
except* ValueError as err:
print(f"{err=}")
try:
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asycio.TaskGroup 例外捕捉
try:
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(coro_success())
task2 = tg.create_task(coro_value_err())
task3 = tg.create_task(coro_type_err())
results = [task1.result(), task2.result(), task3.result()]
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f"{err=}")
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asycio.TaskGroup 例外捕捉
try:
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(coro_success())
task2 = tg.create_task(coro_value_err())
task3 = tg.create_task(coro_type_err())
results = [task1.result(), task2.result(), task3.result()]
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f"{err=}")
ಉظॲཧͷΑ͏ʹexceptͰัଊͰ͖Δ
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asycio.TaskGroup 例外捕捉
try:
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(coro_success())
task2 = tg.create_task(coro_value_err())
task3 = tg.create_task(coro_type_err())
results = [task1.result(), task2.result(), task3.result()]
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f"{err=}")
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asycio.TaskGroup 例外捕捉
try:
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(coro_success())
task2 = tg.create_task(coro_value_err())
task3 = tg.create_task(coro_type_err())
results = [task1.result(), task2.result(), task3.result()]
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f"{err=}")
$ python311 3_asyncio_taskgroup_except.py
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asycio.TaskGroup 例外捕捉
try:
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(coro_success())
task2 = tg.create_task(coro_value_err())
task3 = tg.create_task(coro_type_err())
results = [task1.result(), task2.result(), task3.result()]
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f"{err=}")
$ python311 3_asyncio_taskgroup_except.py
err=ExceptionGroup('unhandled errors in a TaskGroup', [ValueError()])
err=ExceptionGroup('unhandled errors in a TaskGroup', [TypeError()])
$ python311
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asycio.TaskGroup 例外捕捉
try:
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(coro_success())
task2 = tg.create_task(coro_value_err())
task3 = tg.create_task(coro_type_err())
results = [task1.result(), task2.result(), task3.result()]
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f"{err=}")
$ python311 3_asyncio_taskgroup_except.py
err=ExceptionGroup('unhandled errors in a TaskGroup', [ValueError()])
err=ExceptionGroup('unhandled errors in a TaskGroup', [TypeError()])
$ python311
2ͭͷExceptionΛัଊͰ͖͍ͯΔ
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asyncio.TaskGroupͱ৽ߏจʮexcept*ʯ
•ಉ࣌ʹൃੜ͢Δྫ֎ΛัଊͰ͖Δ
•ಉظॲཧͱಉ͡Α͏ͳॻ͖ํͰಡΈ͍͢
asyncio.TaskGroupͷ1ͭͷಛͰ͢
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asycio.TaskGroup 例外捕捉
try:
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(coro_success())
task2 = tg.create_task(coro_value_err())
task3 = tg.create_task(coro_type_err())
results = [task1.result(), task2.result(), task3.result()]
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f"{err=}")
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asycio.TaskGroup 例外捕捉
try:
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(coro_success())
task2 = tg.create_task(coro_value_err())
task3 = tg.create_task(coro_type_err())
results = [task1.result(), task2.result(), task3.result()]
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f"{err=}")
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asycio.TaskGroup 例外捕捉
try:
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(coro_success())
task2 = tg.create_task(coro_value_err())
task3 = tg.create_task(coro_type_err())
results = [task1.result(), task2.result(), task3.result()]
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f"{err=}")
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asycio.TaskGroup 例外捕捉
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f"{err=}")
except*
except*
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asycio.TaskGroup 例外捕捉
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f"{err=}")
except*
except*
err=ExceptionGroup('unhandled errors in a TaskGroup', [ValueError()])
err=ExceptionGroup('unhandled errors in a TaskGroup', [TypeError()])
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新構⽂ except*
except*
•PEP 654: Exception Groups and except*.
•Python 3.11ͷ৽ߏจ
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新構⽂ except*
except*
•PEP 654: Exception Groups and except*.
•Python 3.11ͷ৽ߏจ
•ΈࠐΈͷྫ֎ܕʹ ExceptionGroup (3.11Ճ)ͱ߹Θͤͯ͏
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新構⽂ except*
except*
•PEP 654: Exception Groups and except*.
•Python 3.11ͷ৽ߏจ
•ΈࠐΈͷྫ֎ܕʹ ExceptionGroup (3.11Ճ)ͱ߹Θͤͯ͏
•ExceptionGroup ͱ
•ؔ࿈ੑͷͳ͍ෳͷྫ֎Λൃੜͤ͞Δඞཁ͕͋Δ߹ʹར༻͢Δ
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新構⽂ except*
except*
•PEP 654: Exception Groups and except*.
•Python 3.11ͷ৽ߏจ
•ΈࠐΈͷྫ֎ܕʹ ExceptionGroup (3.11Ճ)ͱ߹Θͤͯ͏
•ExceptionGroup ͱ
•ؔ࿈ੑͷͳ͍ෳͷྫ֎Λൃੜͤ͞Δඞཁ͕͋Δ߹ʹར༻͢Δ
•ExceptionGroup(“ϝοηʔδ”, [ValueError(1), TypeError(2)])
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新構⽂ except*
except*
•PEP 654: Exception Groups and except*.
•Python 3.11ͷ৽ߏจ
•ΈࠐΈͷྫ֎ܕʹ ExceptionGroup (3.11Ճ)ͱ߹Θͤͯ͏
•ExceptionGroup
•ؔ࿈ੑͷͳ͍ෳͷྫ֎Λൃੜͤ͞Δඞཁ͕͋Δ߹ʹར༻͢Δ
•try except ͰัଊͰ͖Δ •try except* Ͱัଊ͢Δͱෳͷexcept
•ExceptionGroup(“ϝοηʔδ”, [ValueError(1), TypeError(2)])
ͱ
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asycio.TaskGroup
IUUQTHJUIVCDPNQZUIPODQZUIPOCMPCNBJO-JCBTZODJPUBTLHSPVQTQZ
class TaskGroup:
...
async def __aexit__(self, et, exc, tb):
...
if self._errors:
# Exceptions are heavy objects that can have object
# cycles (bad for GC); let's not keep a reference to
# a bunch of them.
errors = self._errors
self._errors = None
me = BaseExceptionGroup('unhandled errors in a TaskGroup', errors)
raise me from None
ExceptionGroup
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class TaskGroup:
...
async def __aexit__(self, et, exc, tb):
...
if self._errors:
# Exceptions are heavy objects that can have object
# cycles (bad for GC); let's not keep a reference to
# a bunch of them.
errors = self._errors
self._errors = None
me = BaseExceptionGroup('unhandled errors in a TaskGroup', errors)
raise me from None
IUUQTHJUIVCDPNQZUIPODQZUIPOCMPCNBJO-JCBTZODJPUBTLHSPVQTQZ
asycio.TaskGroup ExceptionGroup
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IUUQTHJUIVCDPNQZUIPODQZUIPOCMPCNBJO-JCBTZODJPUBTLHSPVQTQZ
class TaskGroup:
...
async def __aexit__(self, et, exc, tb):
...
if self._errors:
# Exceptions are heavy objects that can have object
# cycles (bad for GC); let's not keep a reference to
# a bunch of them.
errors = self._errors
self._errors = None
me = BaseExceptionGroup('unhandled errors in a TaskGroup', errors)
raise me from None
asycio.TaskGroup ExceptionGroup
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新構⽂ except*
except* ͳΜͷͨΊʹੜ·Εͨʁ
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新構⽂ except*
except*
•PEP 654: Exception Groups and except*.
•PEP654ͷMotivationʢಈػʣʹ4ͭͷέʔε
ͳΜͷͨΊʹੜ·Εͨʁ
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新構⽂ except*
except*
•PEP 654: Exception Groups and except*.
•PEP654ͷMotivationʢಈػʣʹ4ͭͷέʔε
•Concurrent errorsʢಉ࣌ʹൃੜ͢ΔΤϥʔʣ
ͳΜͷͨΊʹੜ·Εͨʁ
•ෳͷλεΫ͕ૹग़͢Δྫ֎Λॲཧ͢Δྑ͍ํ๏ɺͳ͍
•asyncio.gather()ͷ՝
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新構⽂ except*
except*
•PEP 654: Exception Groups and except*.
•PEP654ͷMotivationʢಈػʣʹ4ͭͷέʔε
•Concurrent errorsʢಉ࣌ʹൃੜ͢ΔΤϥʔʣ
ͳΜͷͨΊʹੜ·Εͨʁ
•ෳͷλεΫ͕ૹग़͢Δྫ֎Λॲཧ͢Δྑ͍ํ๏ɺͳ͍
•asyncio.gather()ͷ՝
•except* ߏจඇಉظॲཧͷͨΊʹ࣮͞ΕͨɺͱݴͬͯաݴͰͳ͍Α͏Ͱ͢
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新構⽂ except*
except* ͳΜͷͨΊʹੜ·Εͨʁ
•except* ߏจඇಉظॲཧͷͨΊʹ࣮͞ΕͨɺͱݴͬͯաݴͰͳ͍Α͏Ͱ͢
•Python 3.11ͷ৽ػೳ(ͦͷ4ʣPEP 654 ྫ֎άϧʔϓͱTaskGroup
•https://www.python.jp/news/wnpython311/except-grp.html
•The 2021 Python Language Summit: PEP 654 — Exception Groups and except*
•https://pyfound.blogspot.com/2021/05/the-2021-python-language-summit-pep-654.html
• How Exception Groups Will Improve Error Handling in AsyncIO - Łukasz Langa | Power IT Conference
•https://www.youtube.com/watch?v=Lfe2zsGS0Js
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•ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ
asycio.TaskGroup 特徴
•ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
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•ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ
•ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
asycio.TaskGroup 特徴
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•ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ
•ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•λεΫͷΩϟϯηϧͬͯͲ͏Δͷʁ
asycio.TaskGroup 特徴
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•ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ
•ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•λεΫͷΩϟϯηϧͬͯͲ͏Δͷʁ
•Python 3.10Ҏલ - asyncio.gather()
•Python 3.11 - asyncio.TaskGroup()
asycio.TaskGroup 特徴
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ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•ྫ֎͕ൃੜͨ͠߹ɺಉ࣌ʹ࣮ߦ͍ͯͨ͠ΓͷλεΫͲ͏ͳΔͷͰ͠ΐ͏͔ʁ
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ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•ྫ֎͕ൃੜͨ͠߹ɺಉ࣌ʹ࣮ߦ͍ͯͨ͠ΓͷλεΫͲ͏ͳΔͷͰ͠ΐ͏͔ʁ
•ΓͷλεΫ͕ͦͷ··࣮ߦ͞Εͯ͠·͏έʔε͕͋Δ
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ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•ྫ֎͕ൃੜͨ͠߹ɺಉ࣌ʹ࣮ߦ͍ͯͨ͠ΓͷλεΫͲ͏ͳΔͷͰ͠ΐ͏͔ʁ
•ΓͷλεΫ͕ͦͷ··࣮ߦ͞Εͯ͠·͏έʔε͕͋Δ
•asyncio.gather()Λྫʹͬͯ͠·͏έʔεΛΈͯΈ·͠ΐ͏
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•ඇಉظؔΛ1ͭՃ - ͭ͢͜͠
ࣄલ४උ - 1ͭඇಉظؔΛՃ
import asyncio
async def coro_success():
return "ޭ"
async def coro_value_err():
raise ValueError
async def coro_type_err():
raise TypeError
มߋͳ͠
มߋͳ͠
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•ඇಉظؔΛ1ͭՃ - ͭ͢͜͠
ࣄલ४උ - 1ͭඇಉظؔΛՃ
import asyncio
async def coro_success():
return "ޭ"
async def coro_value_err():
raise ValueError
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
มߋͳ͠
มߋͳ͠
Ճ
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
$ python310 4_remaining_tasks.py
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
$ python310 4_remaining_tasks.py
err=ValueError()
ऴྃ
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
$ python310 4_remaining_tasks.py
err=ValueError()
ऴྃ
͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
$ python310 4_remaining_tasks.py
err=ValueError()
ऴྃ
͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢
ྫ֎͕ൃੜͨ͠߹
ଞͷλεΫಈ͍ͨ··
ಈ࡞Λ༧ଌͮ͠Β͍
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
$ python310 4_remaining_tasks.py
err=ValueError()
ऴྃ
͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢
ɾࢭΊ͍ͨ
ɾϩʔϧόοΫ͍ͨ͠
ྫ֎͕ൃੜͨ͠߹
ଞͷλεΫಈ͍ͨ··
ಈ࡞Λ༧ଌͮ͠Β͍
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
$ python310 4_remaining_tasks.py
err=ValueError()
ऴྃ
͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢
ɾࢭΊ͍ͨ
ɾϩʔϧόοΫ͍ͨ͠
ྫ֎͕ൃੜͨ͠߹
ଞͷλεΫಈ͍ͨ··
ಈ࡞Λ༧ଌͮ͠Β͍
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ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•ྫ֎͕ൃੜͨ͠߹ɺಉ࣌ʹ࣮ߦ͍ͯͨ͠ΓͷλεΫͲ͏ͳΔͷͰ͠ΐ͏͔ʁ
•ΓͷλεΫ͕ͦͷ··࣮ߦ͞Εͯ͠·͏έʔε͕͋Δ
•λεΫΛΩϟϯηϧ͢Δ ʢΩϟϯηϧɺ3.11ͰՃ͞ΕͨͷͰͳ͍ʣ
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ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•ྫ֎͕ൃੜͨ͠߹ɺಉ࣌ʹ࣮ߦ͍ͯͨ͠ΓͷλεΫͲ͏ͳΔͷͰ͠ΐ͏͔ʁ
•ΓͷλεΫ͕ͦͷ··࣮ߦ͞Εͯ͠·͏έʔε͕͋Δ
•λεΫΛΩϟϯηϧ͢Δ ʢΩϟϯηϧɺ3.11ͰՃ͞ΕͨͷͰͳ͍ʣ
•Ωϟϯηϧͷجຊ
•3.10ҎલͰasyncio.gather()Λར༻ͨ͠߹ͷΩϟϯηϧ
•λεΫ͕ͬͯ͠·͏ॲཧΛमਖ਼͍͖ͯ͠·͠ΐ͏ ͢͜͠ίʔυ͕͘ͳΓ·͢ 🙏
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ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•λεΫ͕ͬͯ͠·͏ॲཧΛमਖ਼͍͖ͯ͠·͠ΐ͏
•Ωϟϯηϧ͞ΕΔඇಉظؔʢcoro_long()ʣɿ
•ͬͯΔλεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ
•ΩϟϯηϧޙॲཧͷྃΛͭ
Ωϟϯηϧ࣌ͷޙॲཧΛՃ
•मਖ਼ͷ؍3ͭ
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ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•λεΫ͕ͬͯ͠·͏ॲཧΛमਖ਼͍͖ͯ͠·͠ΐ͏
•Ωϟϯηϧ͞ΕΔඇಉظؔʢcoro_long()ʣɿ
•ͬͯΔλεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ
•ΩϟϯηϧޙॲཧͷྃΛͭ
Ωϟϯηϧ࣌ͷޙॲཧΛՃ
•मਖ਼ͷ؍3ͭ
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•task.cancel()
•λεΫʹΩϟϯηϧཁٻΛ͢Δ
Ωϟϯηϧ࣌ͷޙॲཧΛՃ
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•task.cancel()
•λεΫʹΩϟϯηϧཁٻΛ͢Δ
•Ωϟϯηϧ͞ΕͨλεΫɺasyncio.CancelledErrorྫ֎͕ૹग़͞ΕΔ
Ωϟϯηϧ࣌ͷޙॲཧΛՃ
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•task.cancel()
•λεΫʹΩϟϯηϧཁٻΛ͢Δ
•Ωϟϯηϧ͞ΕͨλεΫɺasyncio.CancelledErrorྫ֎͕ૹग़͞ΕΔ
•ͦͷͨΊɺඇಉظؔͰasyncio.CancelledErrorΛड͚औΔඞཁ͕͋Δ
Ωϟϯηϧ࣌ͷޙॲཧΛՃ
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•task.cancel()
•λεΫʹΩϟϯηϧཁٻΛ͢Δ
•Ωϟϯηϧ͞ΕͨλεΫɺasyncio.CancelledErrorྫ֎͕ૹग़͞ΕΔ
•ͦͷͨΊɺඇಉظؔͰasyncio.CancelledErrorΛड͚औΔඞཁ͕͋Δ
•͞ΒʹɺඇಉظؔͰasyncio.CancelledErrorΛ࠶ૹग़͢Δ
Ωϟϯηϧ࣌ͷޙॲཧΛՃ
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•task.cancel()
•λεΫʹΩϟϯηϧཁٻΛ͢Δ
•Ωϟϯηϧ͞ΕͨλεΫɺasyncio.CancelledErrorྫ֎͕ૹग़͞ΕΔ
•ͦͷͨΊɺඇಉظؔͰasyncio.CancelledErrorΛड͚औΔඞཁ͕͋Δ
•͞ΒʹɺඇಉظؔͰasyncio.CancelledErrorΛ࠶ૹग़͢Δ
•ͪΐͬͱΑ͘Θ͔Βͳ͍Ͱ͢Ͷɻ࣮ͯ͠Έ·͠ΐ͏ɻ
Ωϟϯηϧ࣌ͷޙॲཧΛՃ
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ࣄલ४උ - Ωϟϯηϧ࣌ͷޙॲཧΛՃ
import asyncio
async def coro_success():
return "ޭ"
async def coro_value_err():
raise ValueError
async def coro_long():
มߋͳ͠
มߋͳ͠
มߋ
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
•ͦͷͨΊɺඇಉظؔͰasyncio.CancelledErrorΛड͚औΔඞཁ͕͋Δ
•͞ΒʹɺඇಉظؔͰasyncio.CancelledErrorΛ࠶ૹग़͢Δ
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async def coro_long(): มߋ
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
•ͦͷͨΊɺඇಉظؔͰasyncio.CancelledErrorΛड͚औΔඞཁ͕͋Δ
•͞ΒʹɺඇಉظؔͰasyncio.CancelledErrorΛ࠶ૹग़͢Δ
ࣄલ४උ - Ωϟϯηϧ࣌ͷޙॲཧΛՃ
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async def coro_long(): มߋ
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
try:
•ͦͷͨΊɺඇಉظؔͰasyncio.CancelledErrorΛड͚औΔඞཁ͕͋Δ
•͞ΒʹɺඇಉظؔͰasyncio.CancelledErrorΛ࠶ૹग़͢Δ
ࣄલ४උ - Ωϟϯηϧ࣌ͷޙॲཧΛՃ
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async def coro_long(): มߋ
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
•ͦͷͨΊɺඇಉظؔͰasyncio.CancelledErrorΛड͚औΔඞཁ͕͋Δ
•͞ΒʹɺඇಉظؔͰasyncio.CancelledErrorΛ࠶ૹग़͢Δ
ࣄલ४උ - Ωϟϯηϧ࣌ͷޙॲཧΛՃ
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async def coro_long(): มߋ
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
•ͦͷͨΊɺඇಉظؔͰasyncio.CancelledErrorΛड͚औΔඞཁ͕͋Δ
•͞ΒʹɺඇಉظؔͰasyncio.CancelledErrorΛ࠶ૹग़͢Δ
ࣄલ४උ - Ωϟϯηϧ࣌ͷޙॲཧΛՃ
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ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•λεΫ͕ͬͯ͠·͏ॲཧΛमਖ਼͍͖ͯ͠·͠ΐ͏
•Ωϟϯηϧ͞ΕΔඇಉظؔʢcoro_long()ʣɿ
•ͬͯΔλεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ
•ΩϟϯηϧޙॲཧͷྃΛͭ
Ωϟϯηϧ࣌ͷޙॲཧΛՃ
•मਖ਼ͷ؍3ͭ
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ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•λεΫ͕ͬͯ͠·͏ॲཧΛमਖ਼͍͖ͯ͠·͠ΐ͏
•Ωϟϯηϧ͞ΕΔඇಉظؔʢcoro_long()ʣɿ
•ͬͯΔλεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ
•ΩϟϯηϧޙॲཧͷྃΛͭ
Ωϟϯηϧ࣌ͷޙॲཧΛՃ
•मਖ਼ͷ؍3ͭ
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•λεΫʹΩϟϯηϧཁٻΛ͢Δ - Task.cancel()
ͬͯΔλεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ
•λεΫͷྃΛఆ͢Δ - Task.done()
•ΩϟϯηϧޙॲཧͷྃΛͭ - asyncio.sleep()
•ίʔυΛमਖ਼͍͖ͯ͠·͠ΐ͏
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
asyncio.run(main())
print("ऴྃ")
Python 3.10Ҏલ - asyncio.gather()
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
Python 3.10Ҏલ - asyncio.gather()
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
λεΫͷঢ়ଶΛ
֬ೝ͘͢͢͠Δ
ॲཧͱͯ͠ಉ͡
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
Python 3.10Ҏલ - asyncio.gather()
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
for task in [task1, task2, task3]:
if task.done() is False:
Task.done()Ͱ
ະྃͷλεΫΛಛఆ
Python 3.10Ҏલ - asyncio.gather()
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
ະྃͷλεΫʹର͠
Task.cancel()Λ࣮ߦ
print("ऴྃ")
Python 3.10Ҏલ - asyncio.gather()
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
ྃͪͷ
asyncio.sleep()
print("ऴྃ")
await asyncio.sleep(1)
Python 3.10Ҏલ - asyncio.gather()
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
શମ͜Μͳײ͡
print("ऴྃ")
await asyncio.sleep(1)
Python 3.10Ҏલ - asyncio.gather()
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λεΫ͕ͬͯ͠·͏߹ͷग़ྗΛͪΐͬͱ͓͞Β͍
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
$ python310 4_remaining_tasks.py
err=ValueError()
ऴྃ
͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢
͓͞Β͍
मਖ਼લͷ࣮ߦ
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
$ python310 4_remaining_tasks.py
err=ValueError()
ऴྃ
͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢
͓͞Β͍
मਖ਼લͷ࣮ߦ
ྫ֎ัଊ
ऴ͕ྃग़ྗ
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λεΫ͕ͬͯ͠·͏έʔε - asyncio.gather - return_exceptions ࢦఆͳ͠
async def main():
"""return_exceptionsͳ͠"""
try:
results = await asyncio.gather(
coro_success(), coro_value_err(), coro_long()
)
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
print("ऴྃ")
asyncio.run(main())
$ python310 4_remaining_tasks.py
err=ValueError()
ऴྃ
͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢
͓͞Β͍
मਖ਼લͷ࣮ߦ
ͬͯΔλεΫ͔Βͷग़ྗ
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async def coro_long(): มߋ
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
•ͦͷͨΊɺඇಉظؔͰasyncio.CancelledErrorΛड͚औΔඞཁ͕͋Δ
•͞ΒʹɺඇಉظؔͰasyncio.CancelledErrorΛ࠶ૹग़͢Δ
ࣄલ४උ - Ωϟϯηϧ࣌ͷޙॲཧΛՃ
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
࣮ߦͯ͠Έ·͠ΐ͏
Python 3.10Ҏલ - asyncio.gather()
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
Python 3.10Ҏલ - asyncio.gather()
$ python310 5_canceling_task_gather.py
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
Python 3.10Ҏલ - asyncio.gather()
$ python310 5_canceling_task_gather.py
err=ValueError()
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
Python 3.10Ҏલ - asyncio.gather()
$ python310 5_canceling_task_gather.py
err=ValueError()
Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
Python 3.10Ҏલ - asyncio.gather()
$ python310 5_canceling_task_gather.py
err=ValueError()
Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
ऴྃ
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
Ωϟϯηϧ͞ΕΔͱ
ඇಉظؔଆͰ
ΩϟϯηϧΛัଊ
Python 3.10Ҏલ - asyncio.gather()
$ python310 5_canceling_task_gather.py
err=ValueError()
Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
ऴྃ
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
Ωϟϯηϧ͞ΕΔͱ
ඇಉظؔଆͰ
ΩϟϯηϧΛัଊ
Python 3.10Ҏલ - asyncio.gather()
$ python310 5_canceling_task_gather.py
err=ValueError()
Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
ऴྃ Ωϟϯηϧͷ͖΄Μ
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λεΫ͕ͬͯ͠·͏έʔε → λεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ ΛՃ
async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
asyncio.run(main())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
Python 3.10Ҏલ - asyncio.gather()
$ python310 5_canceling_task_gather.py
err=ValueError()
Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
ऴྃ
λεΫͷঢ়ଶͷνΣοΫ
Ωϟϯηϧॲཧͷͪ߹Θͤ
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ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•λεΫ͕ͬͯ͠·͏ॲཧΛमਖ਼͍͖ͯ͠·͠ΐ͏
•Ωϟϯηϧ͞ΕΔඇಉظؔʢcoro_long()ʣɿ
•ͬͯΔλεΫͷ֬ೝͱΩϟϯηϧΛࢦࣔ
•ΩϟϯηϧޙॲཧͷྃΛͭ
Ωϟϯηϧ࣌ͷޙॲཧΛՃ
•मਖ਼ͷ؍3ͭ
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asycio.TaskGroup 処理
•ίϯςΩετϚωʔδϟʔΛൈ͚ΔλΠϛϯάͰɺ
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asycio.TaskGroup 処理
•ίϯςΩετϚωʔδϟʔΛൈ͚ΔλΠϛϯάͰɺ
•ͬͨλεΫ͕Ωϟϯηϧ͞ΕΔ
•ΩϟϯηϧॲཧͷྃΛͭ
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asycio.TaskGroup 処理
•ίϯςΩετϚωʔδϟʔΛൈ͚ΔλΠϛϯάͰɺ
•ͬͨλεΫ͕Ωϟϯηϧ͞ΕΔ
•ΩϟϯηϧॲཧͷྃΛͭ
•Ҏ্ʂ
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asycio.TaskGroup 処理
•ίϯςΩετϚωʔδϟʔΛൈ͚ΔλΠϛϯάͰɺ
•ͬͨλεΫ͕Ωϟϯηϧ͞ΕΔ
•ΩϟϯηϧॲཧͷྃΛͭ
•Ҏ্ʂ
•ཁಛʹԿ͢Δඞཁ͋Γ·ͤΜɻΩϟϯηϧ͞Ε·͢ɻ
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asycio.TaskGroup 処理
•ίϯςΩετϚωʔδϟʔΛൈ͚ΔλΠϛϯάͰɺ
•ͬͨλεΫ͕Ωϟϯηϧ͞ΕΔ
•ΩϟϯηϧॲཧͷྃΛͭ
•Ҏ্ʂ
•ཁಛʹԿ͢Δඞཁ͋Γ·ͤΜɻΩϟϯηϧ͞Ε·͢ɻ
͖͞΄ͲͷίʔυΛϦϑΝΫλ͍͖ͯ͠·͠ΐ͏
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async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
asyncio.run(main())
print(f"{results=}")
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
asycio.TaskGroup 処理 ϦϑΝΫλϦϯά͍͖ͯ͠·͠ΐ͏
results = await asyncio.gather(*[task1, task2, task3])
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
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async def main():
"""return_exceptionsͳ͠"""
try:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
asyncio.run(main())
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
asycio.TaskGroup 処理 ϦϑΝΫλϦϯά͍͖ͯ͠·͠ΐ͏
results = await asyncio.gather(*[task1, task2, task3])
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
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async def main():
"""return_exceptionsͳ͠"""
try:
asyncio.run(main())
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
asycio.TaskGroup 処理 ϦϑΝΫλϦϯά͍͖ͯ͠·͠ΐ͏
async with asyncio.TaskGroup() as g:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
results = await asyncio.gather(*[task1, task2, task3])
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
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async def main():
"""return_exceptionsͳ͠"""
try:
asyncio.run(main())
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
asycio.TaskGroup 処理 ϦϑΝΫλϦϯά͍͖ͯ͠·͠ΐ͏
async with asyncio.TaskGroup() as g:
task1 = asyncio.create_task(coro_success())
task2 = asyncio.create_task(coro_value_err())
task3 = asyncio.create_task(coro_long())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
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async def main():
"""return_exceptionsͳ͠"""
try:
asyncio.run(main())
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
asycio.TaskGroup 処理 ϦϑΝΫλϦϯά͍͖ͯ͠·͠ΐ͏
async with asyncio.TaskGroup() as g:
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
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async def main():
"""return_exceptionsͳ͠"""
try:
asyncio.run(main())
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
asycio.TaskGroup 処理 ϦϑΝΫλϦϯά͍͖ͯ͠·͠ΐ͏
async with asyncio.TaskGroup() as g:
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
results = [task1.result(), task2.result(), task3.result()]
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
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async def main():
"""return_exceptionsͳ͠"""
try:
asyncio.run(main())
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
asycio.TaskGroup 処理 ϦϑΝΫλϦϯά͍͖ͯ͠·͠ΐ͏
async with asyncio.TaskGroup() as g:
print(f"{results=}")
except ValueError as err:
print(f"{err=}")
except TypeError as err:
print(f”{err=}”)
results = [task1.result(), task2.result(), task3.result()]
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
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async def main():
"""return_exceptionsͳ͠"""
try:
asyncio.run(main())
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
asycio.TaskGroup 処理 ϦϑΝΫλϦϯά͍͖ͯ͠·͠ΐ͏
async with asyncio.TaskGroup() as g:
print(f"{results=}")
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f”{err=}”)
results = [task1.result(), task2.result(), task3.result()]
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
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async def main():
"""return_exceptionsͳ͠"""
try:
asyncio.run(main())
for task in [task1, task2, task3]:
if task.done() is False:
task.cancel() # ະྃͷλεΫΛΩϟϯηϧ
print("ऴྃ")
await asyncio.sleep(1)
asycio.TaskGroup 処理 ϦϑΝΫλϦϯά͍͖ͯ͠·͠ΐ͏
async with asyncio.TaskGroup() as g:
print(f"{results=}")
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f”{err=}”)
results = [task1.result(), task2.result(), task3.result()]
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
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async def main():
"""return_exceptionsͳ͠"""
try:
asyncio.run(main())
print("ऴྃ")
asycio.TaskGroup 処理 ϦϑΝΫλϦϯά͍͖ͯ͠·͠ΐ͏
async with asyncio.TaskGroup() as g:
print(f"{results=}")
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f”{err=}”)
results = [task1.result(), task2.result(), task3.result()]
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
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async def main():
"""TaskGroupͰͷΩϟϯηϧ"""
try:
asyncio.run(main())
print("ऴྃ")
asycio.TaskGroup 処理 ϦϑΝΫλϦϯά͍͖ͯ͠·͠ΐ͏
async with asyncio.TaskGroup() as g:
print(f"{results=}")
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f”{err=}”)
results = [task1.result(), task2.result(), task3.result()]
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
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࣮ߦͯ͠Έ·͠ΐ͏
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
async def main():
"""TaskGroupͰͷΩϟϯηϧ"""
try:
asyncio.run(main())
print("ऴྃ")
async with asyncio.TaskGroup() as g:
print(f"{results=}")
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f”{err=}”)
results = [task1.result(), task2.result(), task3.result()]
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
asycio.TaskGroup 処理
$ python311 6_cancelled_task_taskgroup.py
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࣮ߦͯ͠Έ·͠ΐ͏
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
async def main():
"""TaskGroupͰͷΩϟϯηϧ"""
try:
asyncio.run(main())
print("ऴྃ")
async with asyncio.TaskGroup() as g:
print(f"{results=}")
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f”{err=}”)
results = [task1.result(), task2.result(), task3.result()]
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
asycio.TaskGroup 処理
$ python311 6_cancelled_task_taskgroup.py
Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢
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࣮ߦͯ͠Έ·͠ΐ͏
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
async def main():
"""TaskGroupͰͷΩϟϯηϧ"""
try:
asyncio.run(main())
print("ऴྃ")
async with asyncio.TaskGroup() as g:
print(f"{results=}")
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f”{err=}”)
results = [task1.result(), task2.result(), task3.result()]
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
asycio.TaskGroup 処理
$ python311 6_cancelled_task_taskgroup.py
err=ExceptionGroup('unhandled errors in a TaskGroup', [ValueError()])
Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢
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࣮ߦͯ͠Έ·͠ΐ͏
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
async def main():
"""TaskGroupͰͷΩϟϯηϧ"""
try:
asyncio.run(main())
print("ऴྃ")
async with asyncio.TaskGroup() as g:
print(f"{results=}")
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f”{err=}”)
results = [task1.result(), task2.result(), task3.result()]
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
asycio.TaskGroup 処理
$ python311 6_cancelled_task_taskgroup.py
err=ExceptionGroup('unhandled errors in a TaskGroup', [ValueError()])
Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢
ऴྃ
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ྫ֎ͷัଊͱ
Ωϟϯηϧޙͷॲཧͷ
ॱং͕ೖΕସΘ͍ͬͯΔ
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
async def main():
"""TaskGroupͰͷΩϟϯηϧ"""
try:
asyncio.run(main())
print("ऴྃ")
async with asyncio.TaskGroup() as g:
print(f"{results=}")
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f”{err=}”)
results = [task1.result(), task2.result(), task3.result()]
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
asycio.TaskGroup 処理
$ python311 6_cancelled_task_taskgroup.py
err=ExceptionGroup('unhandled errors in a TaskGroup', [ValueError()])
Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢
ऴྃ
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TaskGroupͷதͰ
݁
༧ଌ͍͢͠ಈ࡞
async def coro_long():
await asyncio.sleep(1)
print("͍ྃͯ͠ͳ͍λεΫ͕ग़ྗ͍ͯ͠·͢")
return "ޭʁ"
except asyncio.CancelledError as err:
try:
print("Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢")
raise asyncio.CancelledError
async def main():
"""TaskGroupͰͷΩϟϯηϧ"""
try:
asyncio.run(main())
print("ऴྃ")
async with asyncio.TaskGroup() as g:
print(f"{results=}")
except* ValueError as err:
print(f"{err=}")
except* TypeError as err:
print(f”{err=}”)
results = [task1.result(), task2.result(), task3.result()]
task1 = g.create_task(coro_success())
task2 = g.create_task(coro_value_err())
task3 = g.create_task(coro_long())
asycio.TaskGroup 処理
$ python311 6_cancelled_task_taskgroup.py
err=ExceptionGroup('unhandled errors in a TaskGroup', [ValueError()])
Ωϟϯηϧ͞ΕͨλεΫ͕ग़ྗ͍ͯ͠·͢
ऴྃ
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•ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ
asycio.TaskGroup 特徴
•ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
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asycio.TaskGroup 特徴
•ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ
•ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•ैདྷͷΑ͏ͳॻ͖ํͰγϯϓϧʹྫ֎Λัଊ
•except* ʹΑͬͯಉ࣌ʹൃੜ͢Δྫ֎Λ༨͢͜ͱͳ͘
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asycio.TaskGroup 特徴
•ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ
•ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•ैདྷͷΑ͏ͳॻ͖ํͰγϯϓϧʹྫ֎Λัଊ
•ࢦࣔ͢Δ͜ͱͳ͘Ωϟϯηϧ
•except* ʹΑͬͯಉ࣌ʹൃੜ͢Δྫ֎Λ༨͢͜ͱͳ͘
•λεΫΛ࣮ߦ࣌ʹҙࣝ͢Δඞཁ͕ͳ͘ͳͬͨ
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asycio.TaskGroup 特徴
•ಉ࣌ʹൃੜͨ͠ྫ֎ͷัଊ
•ྫ֎ൃੜ࣌ͷλεΫͷΩϟϯηϧ
•ैདྷͷΑ͏ͳॻ͖ํͰγϯϓϧʹྫ֎Λัଊ
•ࢦࣔ͢Δ͜ͱͳ͘Ωϟϯηϧ
•except* ʹΑͬͯಉ࣌ʹൃੜ͢Δྫ֎Λ༨͢͜ͱͳ͘
•λεΫΛ࣮ߦ࣌ʹҙࣝ͢Δඞཁ͕ͳ͘ͳͬͨ
•ʮ༧ଌՄೳʯͰʮ҆શʯɺ͔ͭಡΈ͍͢asyncioͷॻ͖ํ
•৽͍͠ “Hello-ish world”
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৽͍͠ “Hello-ish world”
import asyncio
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(some_coro(...))
task2 = tg.create_task(another_coro(...))
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৽͍͠ “Hello-ish world”
import asyncio
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(some_coro(...))
task2 = tg.create_task(another_coro(...))
try:
except* BaseException as e:
print(f"{e=}")
asyncio.run(main())
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৽͍͠ “Hello-ish world”
import asyncio
async def main():
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(some_coro(...))
task2 = tg.create_task(another_coro(...))
try:
except* BaseException as e:
print(f"{e=}")
asyncio.run(main())
Python 3.11
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•Quickstart - Example 3-2. The “Hello-ish World” of Asyncio
import asyncio
import time
async def main():
print(f"{time.ctime()} Hello!")
await asyncio.sleep(1.0)
print(f"{time.ctime()} GoodBye!")
loop = asyncio.get_event_loop()
task = loop.create_task(main())
loop.run_until_complete(task)
pending = asyncio.all_tasks(loop=loop)
for task in pending:
task.cancel()
group = asyncio.gather(*pending, return_exceptions=True)
loop.run_until_complete(group)
loop.close()
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•Quickstart - Example 3-2.
import asyncio
import time
async def main():
print(f"{time.ctime()} Hello!")
await asyncio.sleep(1.0)
print(f"{time.ctime()} GoodBye!")
The “Hello-ish World” of Asyncio
λεΫͷঢ়ଶͷνΣοΫ
Ωϟϯηϧॲཧͷͪ߹Θͤ
loop = asyncio.get_event_loop()
task = loop.create_task(main())
loop.run_until_complete(task)
pending = asyncio.all_tasks(loop=loop)
for task in pending:
task.cancel()
group = asyncio.gather(*pending, return_exceptions=True)
loop.run_until_complete(group)
loop.close()
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•Quickstart - Example 3-2.
import asyncio
import time
async def coro():
print(f"{time.ctime()} Hello!")
await asyncio.sleep(1.0)
print(f"{time.ctime()} GoodBye!")
The “Hello-ish World” of Asyncio
λεΫͷঢ়ଶͷνΣοΫ
Ωϟϯηϧॲཧͷͪ߹Θͤ
async def main():
async with asyncio.TaskGroup() as tg:
task = tg.create_task(coro(...))
try:
except* BaseException as e:
print(f"{e=}")
asyncio.run(main())
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•asyncio֎෦I/OͷͨΊͷͷ
•֎෦ʹґଘ͢ΔͨΊɺྫ֎ى͖͍͢
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•asyncio.TaskGroupͷྫ֎ͷัଊͱΩϟϯηϧ
•asyncio֎෦I/OͷͨΊͷͷ
•֎෦ʹґଘ͢ΔͨΊɺྫ֎ى͖͍͢
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•asyncio.TaskGroupͷྫ֎ͷัଊͱΩϟϯηϧ
•asyncio֎෦I/OͷͨΊͷͷ
•֎෦ʹґଘ͢ΔͨΊɺྫ֎ى͖͍͢
•ॻ͖ͯ͘͢ɺಡΈ͍͢
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•asyncio.TaskGroupͷྫ֎ͷัଊͱΩϟϯηϧ
•asyncio֎෦I/OͷͨΊͷͷ
•֎෦ʹґଘ͢ΔͨΊɺྫ֎ى͖͍͢
•ॻ͖ͯ͘͢ɺಡΈ͍͢
•TaskGroup͞ΘͬͯΈΑ͏͔ͳ
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•asyncio.TaskGroupͷྫ֎ͷัଊͱΩϟϯηϧ
•asyncio֎෦I/OͷͨΊͷͷ
•֎෦ʹґଘ͢ΔͨΊɺྫ֎ى͖͍͢
•ॻ͖ͯ͘͢ɺಡΈ͍͢
•TaskGroup͞ΘͬͯΈΑ͏͔ͳ
•ྫ֎ɾΩϟϯηϧ͕͍··ͰͷίʔυΛݟ͖͔͚ͬ͢
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•asyncio.TaskGroupͷྫ֎ͷัଊͱΩϟϯηϧ
•asyncio֎෦I/OͷͨΊͷͷ
•֎෦ʹґଘ͢ΔͨΊɺྫ֎ى͖͍͢
•ॻ͖ͯ͘͢ɺಡΈ͍͢
•TaskGroup͞ΘͬͯΈΑ͏͔ͳ
•ྫ֎ɾΩϟϯηϧ͕͍··ͰͷίʔυΛݟ͖͔͚ͬ͢
•ΑΓշదͳasyncioϥΠϑΛ
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•λεΫͷঢ়ଶ
ऄ λεΫͷঢ়ଶ
•PENDING - ࣮ߦͪʢ࣮ߦத͜Εʣ
•FINISHED - ྃ
•CANCELLED - Ωϟϯηϧ
•task._stateͰ֬ೝͰ͖Δ
•αϯϓϧίʔυঢ়ଶग़ྗͯ͠·͢ɻͥͻಈ͔ͯ͠Έ͍ͯͩ͘͞ɻ
ίʔυͪ͜Β
IUUQTHJUIVCDPNKSGLUBML
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ऄ TaskGroupͰHTTPX
ίʔυͪ͜Β
IUUQTHJUIVCDPNKSGLUBML
import asyncio
from time import time
import httpx
URL = "https://pokeapi.co/api/v2/pokemon/"
async def access_url_poke(client, num: int) -> str:
r = await client.get(f"{URL}{num}")
pokemon = r.json() # JSONύʔε
return pokemon["name"] # ϙέ໊Λൈ͘
async def main_poke():
"""httpxͰϙέϞϯ151ඖҾͬ͜ൈ͘"""
start = time()
async with httpx.AsyncClient() as client:
try:
async with asyncio.TaskGroup() as tg:
tasks = [
tg.create_task(access_url_poke(client, number))
for number in range(1, 151)
]
except* BaseException as e:
print(f"{e=}")
results = [task.result() for task in tasks]
print(results)
print("time: ", time() - start)
asyncio.run(main_poke())
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ऄ ࣮·ͩ·ͩ͋Δ৽ػೳʂʁ
ίʔυͪ͜Β
IUUQTHJUIVCDPNKSGLUBML
import asyncio
async def main():
try:
async with asyncio.TaskGroup() as tg:
task1 = tg.create_task(some_coro(...))
task2 = tg.create_task(another_coro(...))
except* BaseException as e:
print(f"{e=}")
with asyncio.Runner() as runner:
runner.run(main())
3.11 ৽ػೳ
asyncio.Runner ͬͯͳʹʂʁ
ΠϯλϥΫςΟϒηογϣϯ༻ʁʂ
runΛෳճ͑Δ
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༧ఆߘͩͬͨͱ͜Ζ 🙏
•asyncio.timeout()
•ͬͦ͜ΓՃ͞ΕͨPython 3.11 ৽ػೳ
•wait_for ͷෆ۩߹Λड͚ͯੜ·Εͨʁʂ
•Implement asyncio.timeout() context manager #90927
IUUQTHJUIVCDPNQZUIPODQZUIPOJTTVFT
…
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༧ఆߘͩͬͨͱ͜Ζ 🙏
•asyncioਐԽͷྺ࢙
•࣮Python1.5͔Β͋ͬͨඇಉظػೳ asyncore
•αʔυύʔςΟͰͷඇಉظ࣮
•curio, trio , AnyIO, quattro ͳͲͳͲ
…
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謝辞
•Using Asyncio in Python - Oreilly & Associates Inc
•Python 3.11 Preview: Task and Exception Groups - realpython.com
•https://realpython.com/python311-exception-groups/
•Python 3.11ͷ৽ػೳ(ͦͷ4ʣPEP 654 ྫ֎άϧʔϓͱTaskGroup
•https://www.python.jp/news/wnpython311/except-grp.html
•The 2021 Python Language Summit: PEP 654 — Exception Groups and except*
•https://pyfound.blogspot.com/2021/05/the-2021-python-language-summit-pep-654.html
• How Exception Groups Will Improve Error Handling in AsyncIO - Łukasz Langa | Power IT Conference
•https://www.youtube.com/watch?v=Lfe2zsGS0Js
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ご静聴ありがとうございました 👋