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プロダクションでのPython 非 同期ユースケース Trio/Trio-Utilを中 心 に Junya Fukuda PyCon JP 2024

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•book •Python࣮ફϨγϐ •ΤΩεύʔτPythonϓϩάϥϛϯάվగ4൛ •Junya Fukudaʢ@JunyaFffʣ •Photos 📷 post 👍 •Software Engineer at Groove X, inc. •࿈ࡌ: Python Monthly Topics | gihyo.jp ͖ΐ͏ͷίʔυ 🔍GitHub jrfk talk

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Python の 非 同期を使っていますか？ ✋

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Thank You! Python の 非 同期を使っていますか？ ✋

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Web? ✋ Python の 非 同期を使っていますか？ ✋

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Web? ✋ Database? ✋ Python の 非 同期を使っていますか？ ✋

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Web? ✋ Database? ✋ API calls? ✋ Python の 非 同期を使っていますか？ ✋

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Trio? ✋ ✋ ✋

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🤝🤝🤝🤝🤝

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わたしたちはロボット開発で Python 非 同期を使っています

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😊😊😊

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プロダクションでのPython 非 同期ユースケース Trio/Trio-Utilを中 心 に

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プロダクションでのPython 非 同期ユースケース Trio/Trio-Utilを中 心 に

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プロダクションでのPython 非 同期ユースケース Trio/Trio-Utilを中 心 に

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•Trio ͱ Trio-util, asyncio ͷAPIൺֱ •anyio ͦͯ͠ subinterpreter/free threading ͱasync •Python async ͱ ϩϘοτͰͷϢʔεέʔε

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•Python async ͱ ϩϘοτͰͷϢʔεέʔε •Why Python Async •Why Trio •Trio ͱ Trio-util, asyncio ͷAPIൺֱ •anyio ͦͯ͠ subinterpreter/free threading ͱasync

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•Python async ͱ ϩϘοτͰͷϢʔεέʔε •Why Python Async •Why Trio •Trio ͱ Trio-util, asyncio ͷAPIൺֱ •anyio ͦͯ͠ subinterpreter/free threading ͱasync

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•Python async ͱ ϩϘοτͰͷϢʔεέʔε •Why Python Async •Why Trio •Trio ͱ Trio-util, asyncio ͷAPIൺֱ •anyio ͦͯ͠ subinterpreter/free threading ͱasync

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•Python async ͱ ϩϘοτͰͷϢʔεέʔε •Why Python Async •Why Trio •Trio ͱ Trio-util, asyncio ͷAPIൺֱ •anyio ͦͯ͠ subinterpreter/free threading ͱasync

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•TrioΛ༻͍ͨϓϩμΫγϣϯϢʔεέʔεͷ۩ମྫ

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•Trioͱasyncioͷҧ͍ͱʮstructured concurrencyʯͷ֓೦ •TrioΛ༻͍ͨϓϩμΫγϣϯϢʔεέʔεͷ۩ମྫ

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•ͨ͘͞ΜͷIOͷ͋ΔඇಉظΞϓϦέʔγϣϯͰͷώϯτ •Trioͱasyncioͷҧ͍ͱʮstructured concurrencyʯͷ֓೦ •TrioΛ༻͍ͨϓϩμΫγϣϯϢʔεέʔεͷ۩ମྫ

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•Python async ͱ ϩϘοτͰͷϢʔεέʔε •Why Python Async •Why Trio •Trio ͱ Trio-util, asyncio ͷAPIൺֱ •anyio ͦͯ͠ subinterpreter/free threading ͱasync

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•Python async ͱ ϩϘοτͰͷϢʔεέʔε

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•Python async ͱ ϩϘοτͰͷϢʔεέʔε

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ͳͥҙࢥܾఆΤϯδϯʹ Python ඇಉظΛ࠾༻ͨ͠ͷ͔ʁ

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Why Python Async •1ͭ໨ͷཧ༝ •2ͭ໨ͷཧ༝

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Why Python Async •Ո଒ܕϩϘοτʮLOVOTʯ

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Why Python Async •Ո΍ΦϑΟεͳͲͰ฻Β͢ •Ո଒ܕϩϘοτʮLOVOTʯ

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Why Python Async •ͨ͘͞Μͷηϯαʔ •Ո଒ܕϩϘοτʮLOVOTʯ •Ո΍ΦϑΟεͳͲͰ฻Β͢

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Why Python Async •൴Β͸֎ͷ৘ใΛͨ͘͞Μಘ͍ͯΔ

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Why Python Async •൴Β͸֎ͷ৘ใΛͨ͘͞Μಘ͍ͯΔ $16DPSFT .$6T TFOTPST

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Why Python Async •ͨ͘͞Μͷηϯαʔ •Ո଒ܕϩϘοτʮLOVOTʯ •Ո΍ΦϑΟεͳͲͰ฻Β͢ •؀ڥΛೝࣝͨ͠ΓɺҙࢥܾఆΛ͢ΔͨΊ

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Ұॹʹ฻Β͢LOVOT

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೔ৗੜ׆ʹ͓͚Δେྔͷ Πϯϓοτ Ұॹʹ฻Β͢LOVOT

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೔ৗੜ׆ʹ͓͚Δେྔͷ Πϯϓοτ Ξ΢τϓοτ Ұॹʹ฻Β͢LOVOT

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೔ৗੜ׆ʹ͓͚Δେྔͷ Πϯϓοτ Ξ΢τϓοτ ͦΕΒΛಉ࣌ʹߦ͏ඞཁ Ұॹʹ฻Β͢LOVOT

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Why Python Async •1ͭ໨ͷཧ༝ - ฒߦॲཧ͕ඞཁ •ͨ͘͞Μͷ I/O Λಉ࣌ʹ

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Why Python Async •1ͭ໨ͷཧ༝ - ฒߦॲཧ͕ඞཁ •ͨ͘͞Μͷ I/O Λಉ࣌ʹ

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Why Python Async •1ͭ໨ͷཧ༝ - ฒߦॲཧ͕ඞཁ •2ͭ໨ͷཧ༝ •ͨ͘͞Μͷ I/O Λಉ࣌ʹ

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Why Python Async •ͨ͘͞ΜͷϚΠΫϩαʔϏε͕ಈ͍͍ͯΔ

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Why Python Async •ϋʔυ΢ΣΞ͔Βͷ৘ใɺΫϥ΢υ࿈ܞͳͲ΋ •ͨ͘͞ΜͷϚΠΫϩαʔϏε͕ಈ͍͍ͯΔ

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Why Python Async •ͦͯͦ͠ΕΒΛݶΒΕͨϦιʔεͰ •ϋʔυ΢ΣΞ͔Βͷ৘ใɺΫϥ΢υ࿈ܞͳͲ΋ •ͨ͘͞ΜͷϚΠΫϩαʔϏε͕ಈ͍͍ͯΔ

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Why Python Async •ͦͯͦ͠ΕΒΛݶΒΕͨϦιʔεͰ •ϋʔυ΢ΣΞ͔Βͷ৘ใɺΫϥ΢υ࿈ܞͳͲ΋ •ͨ͘͞ΜͷϚΠΫϩαʔϏε͕ಈ͍͍ͯΔ

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Why Python Async •1ͭ໨ͷཧ༝ - ฒߦॲཧ͕ඞཁ •2ͭ໨ͷཧ༝ •ͨ͘͞Μͷ I/O Λಉ࣌ʹ

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Why Python Async •ͨ͘͞Μͷ I/O Λಉ࣌ʹ •1ͭ໨ͷཧ༝ - ฒߦॲཧ͕ඞཁ •2ͭ໨ͷཧ༝ •ݶΒΕͨϦιʔε

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Why Python Async •ͨ͘͞Μͷ I/O Λಉ࣌ʹ •1ͭ໨ͷཧ༝ - ฒߦॲཧ͕ඞཁ •2ͭ໨ͷཧ༝ •ݶΒΕͨϦιʔε Python Async

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🤔

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なぜ asyncio でなく Trio? 🌷

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なぜ asyncio でなく Trio? asyncio Trio

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なぜ asyncio でなく Trio? asyncio Trio 標準ライブラリ

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なぜ asyncio でなく Trio? asyncio Trio 標準ライブラリ サードパーティ

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たとえば Urllib（純正シンプル） requests（使いやすい） みたいな違いはない

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Trio? ✋ ✋ ✋

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Trio? ✋ ✋ ✋ （🙈PyConUS2024 でもいなかった 🤫）

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なぜ asyncio でなく Trio? 🌷

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なぜ asyncio でなく Trio? 🌷 わざわざ選ぶ理由ないよね

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Why Trio? •Robust cancellation •Structured Concurrency •User-friendly API ·ͩߴϨϕϧAPIͳ͍࣌୅ 😢 •͜ΕΛܾఆͨ͠ͷ͸ 2017೥ౙ •Python3.6ͷ࣌୅

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🤔 Structured Concurrencyとキャンセル

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•Structured Concurrency ͬͯԿʁ •ߏ଄Խ͞Εͨฒߦੑ •Martin Sustrik ࢯ͕2016೥2݄ʹఏএͨ֓͠೦ Structured Concurrency | 250bpm.com : https://250bpm.com/blog:71/ Why Trio? - Structured Concurrencyとキャンセル

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•ඇಉظॲཧͷ։࢝ͱऴ͕ྃ໌֬ʹ ೖΕࢠʹͳΔ͜ͱ ͳͥೖΕࢠʹʁ Why Trio? - Structured Concurrencyとキャンセル •Structured Concurrency ͬͯ֓೦

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•՝୊͸ʮΩϟϯηϧʯ main() foo() bar() Why Trio? - Structured Concurrencyとキャンセル

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•՝୊͸ʮΩϟϯηϧʯ main() foo() bar() 👍 Why Trio? - Structured Concurrencyとキャンセル

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•՝୊͸ʮΩϟϯηϧʯ main() foo() bar() Why Trio? - Structured Concurrencyとキャンセル

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•՝୊͸ʮΩϟϯηϧʯ main() foo() bar() 🤔 Why Trio? - Structured Concurrencyとキャンセル

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•՝୊͸ʮΩϟϯηϧʯ main() foo() bar() Why Trio? - Structured Concurrencyとキャンセル 1. ଙεϨου͸ͦͷ··ॲཧ͢Δέʔε 2. Ωϟϯηϧͯ͠ཉ͍͠έʔε

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•՝୊͸ʮΩϟϯηϧʯ main() foo() bar() Why Trio? - Structured Concurrencyとキャンセル 1. ଙεϨου͸ͦͷ··ॲཧ͢Δέʔε 2. Ωϟϯηϧͯ͠ཉ͍͠έʔε

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•՝୊͸ʮΩϟϯηϧʯ main() foo() bar() TrioはStructured Concurrencyとキャンセルを2017時点で実現 Why Trio? - Structured Concurrencyとキャンセル

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•Structured Concurrency Why Trio? - Structured Concurrencyとキャンセル

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•Structured Concurrency IUUQTEFWFMPQFSBQQMFDPNWJEFPTQMBZXXED Why Trio? - Structured Concurrencyとキャンセル

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•Structured Concurrency IUUQTPQFOKELPSHKFQT Why Trio? - Structured Concurrencyとキャンセル

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•Structured Concurrency IUUQTLPUMJOMBOHPSHBQJLPUMJOYDPSPVUJOFTLPUMJOYDPSPVUJOFTDPSFLPUMJOYDPSPVUJOFTDPSPVUJOFTDPQF Why Trio? - Structured Concurrencyとキャンセル

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•Structured Concurrency Why Trio? - Structured Concurrencyとキャンセル

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•Structured Concurrency Async Rust can be a pleasure to work with (without `Send + Sync + 'static`) Why Trio? - Structured Concurrencyとキャンセル

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ೖࣾ ͯ͠ͳ͍

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ͭ·Γ

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બఆʹ ؔΘ͓ͬͯΓ·ͤΜ

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Why Trio? •Robust cancellation •Structured Concurrency •User-friendly API •Trioͷΰʔϧʮusability and correctnessʯ

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ͳͥϢʔβʔϑϨϯυϦʔͳAPI͕ඞཁʁ 🤔

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Why Trio? - User-friendly API Python Engineers

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Python Engineers Why Trio? - User-friendly API

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Python Engineers Why Trio? - User-friendly API

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Python Engineers Animators Why Trio? - User-friendly API

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Python Engineers Animators Why Trio? - User-friendly API

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Python Engineers Animators Kawaii Behavior Why Trio? - User-friendly API

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Kawaii Behavior Why Trio? - User-friendly API

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Why Trio? •Robust cancellation •Structured Concurrency •User-friendly API •Trioͷΰʔϧʮusability and correctnessʯ - Ξχϝʔλʔͱͷڠۀ

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なぜ asyncio でなく Trio? 🌷 👍

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Trioとasyncioの交えた 比 較 🌷 👍

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•Robust cancellation •Structured Concurrency •User-friendly API Trio asyncio 比 較 ͜ͷ3ͭͷ؍఺Ͱ APIΛݟͯΈ·͠ΐ͏

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🔍 GitHub jrfk talk

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🔍 GitHub jrfk talk PEP 723対応！

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🔍 GitHub jrfk talk PEP 723対応！

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trio asyncio ·ͱΊ࣮ͯߦ Nursery Taskgroup Nඵޙʹ λεΫऴྃ move_on_after Timeout ஋ͷมԽΛ଴ͭ trio-util.AsyncValue ʁ Trio asyncio 比 較

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 1PUFOUJBM"1*DIBOHFTUPIFMQVTFSTXIPEPOUSFBMJ[FQBSFOUJOHJTBGVMMUJNFKPCu*TTVF IUUQTHJUIVCDPNQZUIPOUSJPUSJPJTTVFT 4IPVMEXFSFOBNFOVSTFSJFT IUUQTHJUIVCDPNQZUIPOUSJPUSJPJTTVFT

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 1PUFOUJBM"1*DIBOHFTUPIFMQVTFSTXIPEPOUSFBMJ[FQBSFOUJOHJTBGVMMUJNFKPCu*TTVF IUUQTHJUIVCDPNQZUIPOUSJPUSJPJTTVFT 4IPVMEXFSFOBNFOVSTFSJFT IUUQTHJUIVCDPNQZUIPOUSJPUSJPJTTVFT •ίʔυΛݟͯΈ·͠ΐ͏

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async def child(): print("👶ࢠίϧʔνϯ ͜Μʹͪ͸") await grandchild() print("👶 ͞Α͏ͳΒ") async def grandchild(): print("👶👶ଙίϧʔνϯ ͜Μʹͪ͸") await trio.sleep(0.1) print("👶👶 ͞Α͏ͳΒ")

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async def main(): async with trio.open_nursery() as nursery: nursery.start_soon(child) nursery.start_soon(child) nursery.start_soon(child) nursery.start_soon(child) print("ดԂ")

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async def main(): async with trio.open_nursery() as nursery: nursery.start_soon(child) nursery.start_soon(child) nursery.start_soon(child) nursery.start_soon(child) print("ดԂ")

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async def main(): async with trio.open_nursery() as nursery: nursery.start_soon(child) nursery.start_soon(child) nursery.start_soon(child) nursery.start_soon(child) print("ดԂ")

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async def main(): async with trio.open_nursery() as nursery: nursery.start_soon(child) nursery.start_soon(child) nursery.start_soon(child) nursery.start_soon(child) print("ดԂ")

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$ uv run 1_trio_nursery.py … 👶ࢠίϧʔνϯ ͜Μʹͪ͸ 👶👶ଙίϧʔνϯ ͜Μʹͪ͸ … 👶👶 ͞Α͏ͳΒ 👶 ͞Α͏ͳΒ ดԂ

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$ uv run 1_trio_nursery.py … 👶ࢠίϧʔνϯ ͜Μʹͪ͸ 👶👶ଙίϧʔνϯ ͜Μʹͪ͸ … 👶👶 ͞Α͏ͳΒ 👶 ͞Α͏ͳΒ ดԂ

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$ uv run 1_trio_nursery.py … 👶ࢠίϧʔνϯ ͜Μʹͪ͸ 👶👶ଙίϧʔνϯ ͜Μʹͪ͸ … 👶👶 ͞Α͏ͳΒ 👶 ͞Α͏ͳΒ ดԂ

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$ uv run 1_trio_nursery.py … 👶ࢠίϧʔνϯ ͜Μʹͪ͸ 👶👶ଙίϧʔνϯ ͜Μʹͪ͸ … 👶👶 ͞Α͏ͳΒ 👶 ͞Α͏ͳΒ ดԂ

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async def main(): async with trio.open_nursery() as nursery: nursery.start_soon(child) nursery.start_soon(child) nursery.start_soon(child) nursery.start_soon(child) print("ดԂ")

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async def main(): async with trio.open_nursery() as nursery: nursery.start_soon(child) nursery.start_soon(child) nursery.start_soon(child) nursery.start_soon(child) print("ดԂ") •Structured Concurrency 🎉

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main 保育園 ：open_nursery

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main 保育園 ：open_nursery 子 ：

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main 保育園 ：open_nursery 子 ： 孫：

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main 保育園 ：open_nursery 子 ： 孫：

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main 保育園 ：open_nursery 子 ：

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main 保育園 ：open_nursery

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main ࣮ࡍʹtrio discussionͷͳ͔Ͱ ʮશͯͷࢠλεΫ͕ແࣄʹऴྃ͢Δ·ͰݟकΔʯ

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main ࣮ࡍʹtrio discussionͷͳ͔Ͱ ʮશͯͷࢠλεΫ͕ແࣄʹऴྃ͢Δ·ͰݟकΔʯ •ଓ͍ͯΩϟϯηϧʹ͍ͭͯɺΈͯΈ·͠ΐ͏

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async def main(): try: async with trio.open_nursery() as nursery: nursery.start_soon(coro_success) nursery.start_soon(coro_value_err) nursery.start_soon(coro_type_err) nursery.start_soon(triplet_nap) # ৸ͯΔ except* Exception as err: print(f"{err.exceptions=}") await trio.sleep(5) # 👶👶👶͕print͞Εͳ͍ print("ดԂ")

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async def main(): try: async with trio.open_nursery() as nursery: nursery.start_soon(coro_success) nursery.start_soon(coro_value_err) nursery.start_soon(coro_type_err) nursery.start_soon(triplet_nap) # ৸ͯΔ except* Exception as err: print(f"{err.exceptions=}") await trio.sleep(5) # 👶👶👶͕print͞Εͳ͍ print("ดԂ")

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async def main(): try: async with trio.open_nursery() as nursery: nursery.start_soon(coro_success) nursery.start_soon(coro_value_err) nursery.start_soon(coro_type_err) nursery.start_soon(triplet_nap) # ৸ͯΔ except* Exception as err: print(f"{err.exceptions=}") await trio.sleep(5) # 👶👶👶͕print͞Εͳ͍ print("ดԂ")

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async def main(): try: async with trio.open_nursery() as nursery: nursery.start_soon(coro_success) nursery.start_soon(coro_value_err) nursery.start_soon(coro_type_err) nursery.start_soon(triplet_nap) # ৸ͯΔ except* Exception as err: print(f"{err.exceptions=}") await trio.sleep(5) # 👶👶👶͕print͞Εͳ͍ print("ดԂ")

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async def triplet_nap(): print("௕͍ίϧʔνϯ ։࢝") await trio.sleep(3) print("👶👶👶") return "ดԂ͔ͩΒؼΓ·͠ΐ͏"

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async def triplet_nap(): print("௕͍ίϧʔνϯ ։࢝") await trio.sleep(3) print("👶👶👶") return "ดԂ͔ͩΒؼΓ·͠ΐ͏"

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async def triplet_nap(): print("௕͍ίϧʔνϯ ։࢝") await trio.sleep(3) print("👶👶👶") return "ดԂ͔ͩΒؼΓ·͠ΐ͏"

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•՝୊͸ʮΩϟϯηϧʯ main() foo() bar() Why Trio? - Structured Concurrencyとキャンセル

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$ uv run 2_trio_nursery_exceptiongroup.py ௕͍ίϧʔνϯ ։࢝ err.exceptions=(ValueError(), TypeError()) ดԂ

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$ uv run 2_trio_nursery_exceptiongroup.py ௕͍ίϧʔνϯ ։࢝ err.exceptions=(ValueError(), TypeError()) ดԂ 👶👶👶ͳ͍

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main 保育園 ：open_nursery

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main 保育園 ：open_nursery 子 ：

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main 保育園 ：open_nursery 子 ：

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•APIͱͯ͠ෆࢥٞͳ໊લ •nursery: อҭԂ trio.nursery 親：main 保育園 ：open_nursery 子 ： •Structured Concurrency •Ωϟϯηϧ

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trio asyncio ·ͱΊ࣮ͯߦ Nursery Taskgroup Nඵޙʹ λεΫऴྃ move_on_after Timeout ஋ͷมԽΛ଴ͭ trio-util.AsyncValue ʁ Trio asyncio 比 較

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•3.11Ͱ௥Ճ͞ΕͨAPI asyncio.Taskgroup

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•3.11Ͱ௥Ճ͞ΕͨAPI asyncio.Taskgroup

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•3.11Ͱ௥Ճ͞ΕͨAPI asyncio.Taskgroup

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•3.11Ͱ௥Ճ͞ΕͨAPI asyncio.Taskgroup

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async def child(): print("👶ࢠίϧʔνϯ ͜Μʹͪ͸") await grandchild() print("👶 ͞Α͏ͳΒ") async def grandchild(): print("👶👶ଙίϧʔνϯ ͜Μʹͪ͸") await trio.sleep(0.1) print("👶👶 ͞Α͏ͳΒ")

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async def main(): async with asyncio.TaskGroup() as g: g.create_task(child()) g.create_task(child()) g.create_task(child()) g.create_task(child(), name="Α͘৸ͯΔ") print("ดԂ")

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async def main(): async with asyncio.TaskGroup() as g: g.create_task(child()) g.create_task(child()) g.create_task(child()) g.create_task(child(), name="Α͘৸ͯΔ") print("ดԂ")

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$ uv run 1_asyncio_taskgroup.py … 👶ࢠίϧʔνϯ ͜Μʹͪ͸ 👶👶ଙίϧʔνϯ ͜Μʹͪ͸ … 👶👶 ͞Α͏ͳΒ 👶 ͞Α͏ͳΒ ดԂ

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async def main(): async with asyncio.TaskGroup() as g: g.create_task(child()) g.create_task(child()) g.create_task(child()) g.create_task(child(), name="Α͘৸ͯΔ") print("ดԂ")

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async def main(): async with asyncio.TaskGroup() as g: g.create_task(child()) g.create_task(child()) g.create_task(child()) g.create_task(child(), name="Α͘৸ͯΔ") print("ดԂ") •Structured Concurrency 🎉

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async def main(): async with asyncio.TaskGroup() as g: g.create_task(child()) g.create_task(child()) g.create_task(child()) g.create_task(child(), name="Α͘৸ͯΔ") print("ดԂ") •Structured Concurrency 🎉 •Ωϟϯηϧ΋ΈͯΈ·͠ΐ͏

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async def main(): try: async with asyncio.TaskGroup() as g: task1 = g.create_task(coro_success()) task2 = g.create_task(coro_value_err()) task3 = g.create_task(coro_type_err()) task4 = g.create_task(triplet_nap(), name="Α͘৸ͯΔ") results = [task1.result(), task2.result(), task3.result()] print(f"{results=}") except* Exception as err: print(f"{err.exceptions=}") await asyncio.sleep(5) # 👶👶👶͕print͞Εͳ͍͜ͱΛ֬ೝ print("ดԂ")

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async def main(): try: async with asyncio.TaskGroup() as g: task1 = g.create_task(coro_success()) task2 = g.create_task(coro_value_err()) task3 = g.create_task(coro_type_err()) task4 = g.create_task(triplet_nap(), name="Α͘৸ͯΔ") results = [task1.result(), task2.result(), task3.result()] print(f"{results=}") except* Exception as err: print(f"{err.exceptions=}") await asyncio.sleep(5) # 👶👶👶͕print͞Εͳ͍͜ͱΛ֬ೝ print("ดԂ")

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$ uv run 2_asyncio_taskgroup_exceptiongroup.py ௕͍ίϧʔνϯ ։࢝ err.exceptions=(ValueError(), TypeError()) ดԂ

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$ uv run 2_asyncio_taskgroup_exceptiongroup.py ௕͍ίϧʔνϯ ։࢝ err.exceptions=(ValueError(), TypeError()) ดԂ 👶👶👶ͳ͍

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Trio asyncio 交 比 較 trio asyncio ಛ௃ ·ͱΊ࣮ͯߦ Nursery Taskgroup Nඵޙʹ λεΫऴྃ move_on_after Timeout ஋ͷมԽΛ଴ͭ trio-util.AsyncValue ʁ

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Trio asyncio 交 比 較 trio asyncio ಛ௃ ·ͱΊ࣮ͯߦ Nursery Taskgroup ߏ଄Խ 🙆 Ωϟϯηϧ 🙆 ϑϨϯυϦ 🙆 Nඵޙʹ λεΫऴྃ move_on_after Timeout ஋ͷมԽΛ଴ͭ trio-util.AsyncValue ʁ

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Trio asyncio 交 比 較 trio asyncio ಛ௃ ·ͱΊ࣮ͯߦ Nursery Taskgroup ߏ଄Խ 🙆 Ωϟϯηϧ 🙆 ϑϨϯυϦ 🙆 Nඵޙʹ λεΫऴྃ move_on_after Timeout ஋ͷมԽΛ଴ͭ trio-util.AsyncValue ʁ

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async def main(): with trio.move_on_after(1) as cancel_scope: await triplet_nap() if cancel_scope.cancelled_caught: print("ͪΌΜͱ͓͖ͯͶ") print("͓ΘΓ")

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async def main(): with trio.move_on_after(1) as cancel_scope: await triplet_nap() if cancel_scope.cancelled_caught: print("ͪΌΜͱ͓͖ͯͶ") print("͓ΘΓ") 時間 設定

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async def main(): with trio.move_on_after(1) as cancel_scope: await triplet_nap() if cancel_scope.cancelled_caught: print("ͪΌΜͱ͓͖ͯͶ") print("͓ΘΓ")

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async def main(): with trio.move_on_after(1) as cancel_scope: await triplet_nap() if cancel_scope.cancelled_caught: print("ͪΌΜͱ͓͖ͯͶ") print("͓ΘΓ")

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async def main(): with trio.move_on_after(1) as cancel_scope: await triplet_nap() if cancel_scope.cancelled_caught: print("ͪΌΜͱ͓͖ͯͶ") print("͓ΘΓ") •Structured Concurrency 🎉

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async def triplet_nap(): print("௕͍ίϧʔνϯ ։࢝") await trio.sleep(3) print("👶👶👶") return "ดԂ͔ͩΒؼΓ·͠ΐ͏"

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async def triplet_nap(): print("௕͍ίϧʔνϯ ։࢝") await trio.sleep(3) print("👶👶👶") return "ดԂ͔ͩΒؼΓ·͠ΐ͏"

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$ uv run 3_trio_move_on_after_except.py … ௕͍ίϧʔνϯ ։࢝ ͪΌΜͱ͓͖ͯͶ ͓ΘΓ 👶👶👶ͳ͍

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Trio asyncio 交 比 較 trio asyncio ಛ௃ ·ͱΊ࣮ͯߦ Nursery Taskgroup ߏ଄Խ 🙆 Ωϟϯηϧ 🙆 ϑϨϯυϦ 🙆 Nඵޙʹ λεΫऴྃ move_on_after Timeout ஋ͷมԽΛ଴ͭ trio-util.AsyncValue ʁ

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async def main(): try: async with asyncio.timeout(1): await triplet_nap() except TimeoutError as err: print(f"{err=}") print("ͪΌΜͱ͓͖ͯͶ") print("͓ΘΓ")

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async def main(): try: async with asyncio.timeout(1): await triplet_nap() except TimeoutError as err: print(f"{err=}") print("ͪΌΜͱ͓͖ͯͶ") print("͓ΘΓ") 時間 設定

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async def main(): try: async with asyncio.timeout(1): await triplet_nap() except TimeoutError as err: print(f"{err=}") print("ͪΌΜͱ͓͖ͯͶ") print("͓ΘΓ") 時間 設定 •Structured Concurrency 🎉

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async def triplet_nap(): print("௕͍ίϧʔνϯ ։࢝") await asyncio.sleep(3) print("👶👶👶") return "ดԂ͔ͩΒؼΓ·͠ΐ͏"

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async def triplet_nap(): print("௕͍ίϧʔνϯ ։࢝") await trio.sleep(3) print("👶👶👶") return "ดԂ͔ͩΒؼΓ·͠ΐ͏"

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$ uv run 3_asyncio_timeout.py … ௕͍ίϧʔνϯ ։࢝ err=TimeoutError() ͪΌΜͱ͓͖ͯͶ ͓ΘΓ

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$ uv run 3_asyncio_timeout.py … ௕͍ίϧʔνϯ ։࢝ err=TimeoutError() ͪΌΜͱ͓͖ͯͶ ͓ΘΓ 👶👶👶ͳ͍

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Trio asyncio 交 比 較 trio asyncio ಛ௃ ·ͱΊ࣮ͯߦ Nursery Taskgroup ߏ଄Խ 🙆 Ωϟϯηϧ 🙆 ϑϨϯυϦ 🙆 Nඵޙʹ λεΫऴྃ move_on_after Timeout ஋ͷมԽΛ଴ͭ trio-util.AsyncValue ʁ

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Trio asyncio 交 比 較 trio asyncio ಛ௃ ·ͱΊ࣮ͯߦ Nursery Taskgroup ߏ଄Խ 🙆 Ωϟϯηϧ 🙆 ϑϨϯυϦ 🙆 Nඵޙʹ λεΫऴྃ move_on_after Timeout ߏ଄Խ 🙆 Ωϟϯηϧ 🙆 ϑϨϯυϦ 🙆 ஋ͷมԽΛ଴ͭ trio-util.AsyncValue ʁ

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🤔

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🤔

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Trio asyncio 交 比 較 Python >= 3.11 trio asyncio ಛ௃ ·ͱΊ࣮ͯߦ Nursery Taskgroup ߏ଄Խ 🙆 Ωϟϯηϧ 🙆 ϑϨϯυϦ 🙆 Nඵޙʹ λεΫऴྃ move_on_after Timeout ߏ଄Խ 🙆 Ωϟϯηϧ 🙆 ϑϨϯυϦ 🙆 ஋ͷมԽΛ଴ͭ trio-util.AsyncValue ʁ

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Trio asyncio 交 比 較 Python < 3.11 trio asyncio asyncioͷಛ௃ ·ͱΊ࣮ͯߦ Nursery gather ߏ଄Խ 🙅 Ωϟϯηϧ 🤔 ϑϨϯυϦ 🤔 Nඵޙʹ λεΫऴྃ move_on_after wait_for ߏ଄Խ 🙅 Ωϟϯηϧ 🤔 ϑϨϯυϦ 🤔 ஋ͷมԽΛ଴ͭ trio-util.AsyncValue ʁ 今 使 ！ ！

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🤔 🌷 👍

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🤔 🌷 👍

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🤔 🌷 👍

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🤔 🌷 👍

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Trio asyncio 交 比 較 Python >= 3.11 trio asyncio ಛ௃ ·ͱΊ࣮ͯߦ Nursery Taskgroup ߏ଄Խ 🙆 Ωϟϯηϧ 🙆 ϑϨϯυϦ 🙆 Nඵޙʹ λεΫऴྃ move_on_after Timeout ߏ଄Խ 🙆 Ωϟϯηϧ 🙆 ϑϨϯυϦ 🙆 ஋ͷมԽΛ଴ͭ trio-util.AsyncValue ʁ

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Trio asyncio 交 比 較 Python >= 3.11 trio asyncio ಛ௃ ·ͱΊ࣮ͯߦ Nursery Taskgroup ߏ଄Խ 🙆 Ωϟϯηϧ 🙆 ϑϨϯυϦ 🙆 Nඵޙʹ λεΫऴྃ move_on_after Timeout ߏ଄Խ 🙆 Ωϟϯηϧ 🙆 ϑϨϯυϦ 🙆 ஋ͷมԽΛ଴ͭ trio-util.AsyncValue ʁ

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大 量の 入力 に対して状態管理をする AsyncValue

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大 量の 入力 に対して状態管理をする AsyncValue trio_util.AsyncValue

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Handling Multiple Inputs •Event-Driven ͳΞϓϩʔνͷAPI܈ ΑΓϑϨϯυϦʔͳ֦ு •Trio-util 🔍HJUIVCUSJPVUJM IUUQTHJUIVCDPN HSPPWFYUSJPVUJM

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Handling Multiple Inputs •AsyncValue Class 👀

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Handling Multiple Inputs •AsyncValue Class 👀 •஋΍awaitable ΛҾ਺ʹ •val = AyncValue(2024) Έ͍ͨͳײ͡

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Handling Multiple Inputs •AsyncValue Class 👀 •஋΍awaitable ΛҾ਺ʹ •val = AyncValue(2024) Έ͍ͨͳײ͡ •ͦΕΛ·ͱΊΔ compose_event ΋͋Γ·͢

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Handling Multiple Inputs •AsyncValue Class 👀 •஋΍awaitable ΛҾ਺ʹ •val = AyncValue(2024) Έ͍ͨͳײ͡ •ओͳAPI͸3ͭ঺հ

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Handling Multiple Inputs •AsyncValue Class 👀 •஋΍awaitable ΛҾ਺ʹ •val.wait_value(஋ or ؔ਺) •Ҿ਺͕஋ͷ৔߹ɺvalue͕Ҿ਺ͷ஋ʹͳΔ·Ͱ଴ͭ

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Handling Multiple Inputs •AsyncValue Class 👀 •஋΍awaitable ΛҾ਺ʹ •val.wait_value(஋ or ؔ਺) •val.wait_transition(ۭ or ஋ or ؔ਺) •஋ͷભҠɾมԽɾؔ਺ͷঢ়ଶΛ଴ͭ

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Handling Multiple Inputs •AsyncValue Class 👀 •஋΍awaitable ΛҾ਺ʹ •val.wait_value(஋ or ؔ਺) •val.wait_transition(ۭ or ஋ or ؔ਺) •Val.eventual_value(ۭ or ஋ or ؔ਺) •৚݅Λຬͨͨ͠ΒloopΛճ͢

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Handling Multiple Inputs •AsyncValue Class 👀 •஋΍awaitable ΛҾ਺ʹ •val.wait_value(஋ or ؔ਺) •val.wait_transition(ۭ or ஋ or ؔ਺) •eventual_value(ۭ or ஋ or ؔ਺) •࣮ࡍʹͲ͏ಈ͔͘ΈͯΈ·͠ΐ͏

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Handling Multiple Inputs •४උ 👀

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Handling Multiple Inputs •४උ 👀 •ϥϯμϜͳ਺ࣈΛฦ͢WebSocketαʔό VWSVO@TJNQMF@XFCTPDLFU@TFSWFSQZ

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Handling Multiple Inputs •४උ 👀 •ϥϯμϜͳ਺ࣈΛฦ͢WebSocketαʔό VWSVO@TJNQMF@XFCTPDLFU@TFSWFSQZ •AsyncValueΛcompose_eventͰ·ͱΊɺͦΕΛ؂ࢹ͢Δ

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Handling Multiple Inputs •४උ 👀 •ϥϯμϜͳ਺ࣈΛฦ͢WebSocketαʔό VWSVO@TJNQMF@XFCTPDLFU@TFSWFSQZ •👶 ͕ ஋͕มԽ͢Δͨͼʹɺग़ྗ͠·͢ •AsyncValueΛcompose_eventͰ·ͱΊɺͦΕΛ؂ࢹ͢Δ

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async def main(): async with trio.open_nursery() as nursery: ws = await connect_websocket( nursery=nursery, host="localhost", port=8888, resource="/", ) event1 = AsyncValue("👶") event2 = AsyncValue("🍼") nursery.start_soon(fetch, ws, event1, event2) with compose_values(event1=event1, event2=event2) as composite_eve async for v in composite_event.eventual_values(): print(f"{v=}") •Continuously watch for value changes 👀

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async def main(): async with trio.open_nursery() as nursery: ws = await connect_websocket( nursery=nursery, host="localhost", port=8888, resource="/", ) event1 = AsyncValue("👶") event2 = AsyncValue("🍼") nursery.start_soon(fetch, ws, event1, event2) with compose_values(event1=event1, event2=event2) as composite_eve async for v in composite_event.eventual_values(): print(f"{v=}") •Continuously watch for value changes 👀

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async def main(): async with trio.open_nursery() as nursery: ws = await connect_websocket( nursery=nursery, host="localhost", port=8888, resource="/", ) event1 = AsyncValue("👶") event2 = AsyncValue("🍼") nursery.start_soon(fetch, ws, event1, event2) with compose_values(event1=event1, event2=event2) as composite_eve async for v in composite_event.eventual_values(): print(f"{v=}") •Continuously watch for value changes 👀

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async def main(): async with trio.open_nursery() as nursery: ws = await connect_websocket( nursery=nursery, host="localhost", port=8888, resource="/", ) event1 = AsyncValue("👶") event2 = AsyncValue("🍼") nursery.start_soon(fetch, ws, event1, event2) with compose_values(event1=event1, event2=event2) as composite_eve async for v in composite_event.eventual_values(): print(f"{v=}") •Continuously watch for value changes 👀

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async def main(): async with trio.open_nursery() as nursery: ws = await connect_websocket( nursery=nursery, host="localhost", port=8888, resource="/", ) event1 = AsyncValue("👶") event2 = AsyncValue("🍼") nursery.start_soon(fetch, ws, event1, event2) with compose_values(event1=event1, event2=event2) as composite_eve async for v in composite_event.eventual_values(): print(f"{v=}") •Continuously watch for value changes 👀

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async def main(): async with trio.open_nursery() as nursery: ws = await connect_websocket( nursery=nursery, host="localhost", port=8888, resource="/", ) event1 = AsyncValue("👶") event2 = AsyncValue("🍼") nursery.start_soon(fetch, ws, event1, event2) with compose_values(event1=event1, event2=event2) as composite_eve async for v in composite_event.eventual_values(): print(f"{v=}") •Continuously watch for value changes 👀

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async def main(): async with trio.open_nursery() as nursery: ws = await connect_websocket( nursery=nursery, host="localhost", port=8888, resource="/", ) event1 = AsyncValue("👶") event2 = AsyncValue("🍼") nursery.start_soon(fetch, ws, event1, event2) with compose_values(event1=event1, event2=event2) as composite_eve async for v in composite_event.eventual_values(): print(f"{v=}") •Continuously watch for value changes 👀

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•Continuously watch for value changes 👀

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大 量の 入力 に対して状態管理をする AsyncValue trio_util.AsyncValue

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Handling Multiple Inputs •Trio-util does not support anyio yet •There is no API that performs the same function. •asyncio-util IUUQTHJUIVCDPNKSGLBTZODJPVUJM Here is today's code

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•Python async ͱ ϩϘοτͰͷϢʔεέʔε •Why Python Async •Why Trio •Trio ͱ Trio-util, asyncio ͷAPIൺֱ •anyio ͦͯ͠ subinterpreter/free threading ͱasync

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anyio •asyncio ͱ trio Λܨ͙Χέϋγ •2018 2018೥10݄ Alex Grönholm ࢯ •࡞੒ͨ͠ओͳཧ༝ •Pythonͷඇಉظϓϩάϥϛϯάʹ͓͚Δॊೈੑͱ ߴϨϕϧͷந৅ԽΛఏڙ •ΑΓ࢖͍΍͘͢ɺΑΓҰ؏ੑͷ͋Δ ඇಉظϓϩάϥϛϯάͷܦݧΛఏڙ͔ͨͬͨ͠ #385: Higher level Python asyncio with AnyIO Transcript

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anyio •asyncio ͱ trio Λܨ͙Χέϋγ #385: Higher level Python asyncio with AnyIO Transcript •Global backend ͱ͍͏ߟ͑ํ •ଟ͘ͷඇಉظϥΠϒϥϦͰ࠾༻, FastAPI, HTTPX…

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if __name__ == "__main__": anyio.run(main, backend="asyncio") # ͜ΕΛtrioʹม͑Δ͚ͩͰಈ͘

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if __name__ == "__main__": anyio.run(main, backend="asyncio") # ͜ΕΛtrioʹม͑Δ͚ͩͰಈ͘ uv run 5_anyio_sample.py

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subinterpreter/free threading •subinterpreter/free threading

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subinterpreter/free threading •subinterpreter/free threading

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# αϒΠϯλϓϦλͰ࣮ߦ͢Δؔ਺ def run_sub_interpreter(): interp_id = interpreters.create() interpreters.run_string( interp_id, """ import asyncio async def async_task(): for i in range(5): ...

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# αϒΠϯλϓϦλͰ࣮ߦ͢Δؔ਺ def run_sub_interpreter(): interp_id = interpreters.create() interpreters.run_string( interp_id, """ import asyncio async def async_task(): for i in range(5): ... uv run 6_subinterpreters_asyncio.py

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•ΑΓշదͳඇಉظϥΠϑΛ •ͨ͘͞ΜͷIOͷ͋ΔඇಉظΞϓϦέʔγϣϯͰͷώϯτ •Trioͱasyncioͷҧ͍ͱʮstructured concurrencyʯͷ֓೦ •TrioΛ༻͍ͨϓϩμΫγϣϯϢʔεέʔεͷ۩ମྫ

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reference •Simplifying Python's Async with Trio •https://talkpython.fm/episodes/show/167/simplifying-pythons-async-with-trio •Higher level Python asyncio with AnyIO •https://talkpython.fm/episodes/show/385/higher-level-python-asyncio-with-anyio •groove-x / trio-util •https://github.com/groove-x/trio-util •Structured Concurrency - Martin Sústrik •https://250bpm.com/blog:71/

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ご静聴ありがとうございました 👋