Pythonでライブをしよう!FoxDotを使った新時代のPython活用法 / pyconjp-2019

PyCon JP 2019 の発表資料です

Transcript

1. PythonͰϥΠϒΛ͠Α͏ʂ FoxDotΛ࢖ͬͨ ৽࣌୅ͷPython׆༻๏ MFWFM
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   !@TJO@UBOBLB
   IBTIUBH
   QZDPOKQ
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2. ର৅ͷํ w 1ZUIPOॻ͚Δ
   w Իූ͸ಡΊͳ͍͚Ͳ1ZUIPO͸ಡΊΔ
   w ϓϩάϥϛϯάͰԻָΛͭ͘Δ͜ͱʹڵຯ͕͋Δ
   w ԻָϊίτνϣοτϫΧϧ
   w Իָ༻ޠͷղઆ౳͸ল͖·͢
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   ৻ଠ࿠ ʢגʣ೔ຊγεςϜٕݚ
   
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   ελοϑ Իָͱਂ໷ϥδΦ͕޷͖ !@TJO@UBOBLB
4. <"%>
   גࣜձࣾ೔ຊγεςϜٕݚ +4- • ࡢ೥ʹҾ͖͖ͭͮɺࠓ೥΋1Z$PO
   +1
   εϙϯαʔ
   • ࠓ೥͸ͳΜͱ(PME
   • ௕໺ݝ௕໺ࢢͷձࣾ
   • 1ZUIPO%KBOHPΛ࢖༻ͨ͠8FCΞϓϦέʔγϣϯͷडୗ։ൃٴͼɺαʔόʔϨε ΞʔΩςΫνϟΛ࢖༻ͨ͠ϑϩϯτΤϯυҊ݅΍*P5Ҋ݅ͱ͍ͬͨϓϩμΫτ։ൃ ΋΍ͬͯ·͢
   • ίϛϡχςΟεϖʔεʮ(&&,-"#/"("/0ʯͷӡӦ
   • ࠓ೥౓͔ΒϚείοτΩϟϥΫλʔ͕஀ੜ
 • ؔ౦ݍͷ͓٬༷Λத৺ʹϦϞʔτϫʔΫͰ͓࢓ࣄΛ΍Βͤͯ௖͍͍ͯΔ
5. 
   ϥΠϒίʔσΟϯά֓ཁ
   
   'PY%PUͷ࢖͍ํ
   
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   1ZUIPOͷจ๏ͰಡΈղ͘ ΞδΣϯμ
6. Ϟνϕʔγϣϯ w ΋ͱ΋ͱझຯͰ%5.
   w ϥΠϒίʔσΟϯάͷଘࡏ͸஌ͬͯͨ
   w ͱ͸͍͑ϓϩάϥϛϯά͢Δඞཁͳ͘ͳ͍ʁ!
   
7. Ϟνϕʔγϣϯ 4PVSDF
   IUUQTXJSFEKQBMHPSBWFTMJWFDPEJOHEKT
8. Ϟνϕʔγϣϯ 4PVSDF
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9. ϥΠϒίʔσΟϯάͱ͸
10. ϥΠϒίʔσΟϯάͬͯԿʁ > Live coding is a new direction in electronic music and video, and is getting somewhere interesting. Live coders expose and rewire the innards of software while it generates improvised music and/or visuals. All code manipulation is projected for your pleasure. ɹɹɹɹɹɹɹɹɹɹɹɹtoplap.org/about ΑΓҾ༻ w 0O
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11. ԿͰϥΠϒίʔσΟϯάʁ !
    %"8΍γʔέϯαͰ΋ಉ͜͡ͱͰ͖ΔͷͰ͸ʁ ΞϧΰϦζϛοΫͳΞϓϩʔν͕Մೳ ࠶ݱੑ
    ࡞ΓࠐΈ ۮવੑ
    ଈڵੑ ϧʔύʔΛ࢖ͬͨϥΠϒύϑΥʔϚϯε͕ํ޲ੑ͍͔ۙ΋ʁ
12. Ͳ͏΍ͬͯϥΠϒίʔσΟϯάʁ
13. Ͳ͏΍ͬͯϥΠϒίʔσΟϯάʁ ιϑτ໊ ݴޠ 'PY
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14. 'PY%PU w 4VQFS$PMJEFSΛ1ZUIPO͔Βૢ࡞Ͱ͖ΔϥΠϒϥϦ
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15. 'PY%PU 6TFS X
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16. 1 Clock.bpm = 120 2 Root.default = ‘C’ 3 Scale.default = ‘major’ 4 5 d1 >> play(“X-O-”) 6 d2 >> play(“#”, dur=32) 7 8 p1 >> pluck([0,1,2,3,4,3,2,1], dur=1/2, amp=1.5) 9 p2 >> blip(P[0,var([2,4])], dur=1/4, oct=6) 10 11 vo >> loop(‘some/path/file.wav’, dur=4)
17. 1 Clock.bpm = 120 2 Root.default = ‘C’ 3 Scale.default = ‘major’ 4 5 d1 >> play(“X-O-”) 6 d2 >> play(“#”, dur=32) 7 8 p1 >> pluck([0,1,2,3,4,3,2,1], dur=1/2, amp=1.5) 9 p2 >> blip(P[0,var([2,4])], dur=1/4, oct=6) 10 11 vo >> loop(‘some/path/file.wav’, dur=4) SynthDefs
18. 1 Clock.bpm = 120 2 Root.default = ‘C’ 3 Scale.default = ‘major’ 4 5 d1 >> play(“X-O-”) 6 d2 >> play(“#”, dur=32) 7 8 p1 >> pluck([0,1,2,3,4,3,2,1], dur=1/2, amp=1.5) 9 p2 >> blip(P[0,var([2,4])], dur=1/4, oct=6) 10 11 vo >> loop(‘some/path/file.wav’, dur=4) PlayerObject SynthDefs
19. 1 Clock.bpm = 120 2 Root.default = ‘C’ 3 Scale.default = ‘major’ 4 5 d1 >> play(“X-O-”) 6 d2 >> play(“#”, dur=32) 7 8 p1 >> pluck([0,1,2,3,4,3,2,1], dur=1/2, amp=1.5) 9 p2 >> blip(P[0,var([2,4])], dur=1/4, oct=6) 10 11 vo >> loop(‘some/path/file.wav’, dur=4) PatternObject PlayerObject SynthDefs
20. 1 Clock.bpm = 120 2 Root.default = ‘C’ 3 Scale.default = ‘major’ 4 5 d1 >> play(“X-O-”) 6 d2 >> play(“#”, dur=32) 7 8 p1 >> pluck([0,1,2,3,4,3,2,1], dur=1/2, amp=1.5) 9 p2 >> blip(P[0,var([2,4])], dur=1/4, oct=6) 10 11 vo >> loop(‘some/path/file.wav’, dur=4) TimeDependentVar PatternObject PlayerObject SynthDefs
21. 4ZOUI%FGT w 'PY%PUͷσϑΥϧτͰ༻ҙ͞Ε͍ͯΔԻ৭܈
     QMBZ
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    ࣗલͰ༻ҙͨ͠Ի੠ϑΝΠϧͷϧʔϓ
    w Ի੠ϑΝΠϧͷύεΛ౉͢
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    w MJTU
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22. 1MBZFS0CKFDU w 4ZOUI%FGTΛૢ࡞͢Δ
    w ଐੑΛฤू͢Δ͜ͱͰԻ৭΍Իߴɺ௕͞౳ΛมߋՄೳ 1 p9 >> pluck(dur=1) 2 3 # 音の長さ(default: play=1/2, other=1) 4 p9.dur = 2 5 6 # 音量(default: 1) 7 p9.amp = 2 8 9 # 音高 10 p9.degree = [0,1,2,3] 11 12 # オクターブ(default: 5) 13 p9.oct = 7
23. w ܁Γฦ͠Λදݱ͢ΔΦϒδΣΫτ
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    w ࢖͍͜ͳ͢ͱ৑௕ͳίʔυΛආ͚ΒΕΔ 1 # list 2 plain_list = [0,1,2,3] 3 4 # PatternObject 5 plain_pattern = P[0,1,2,3] 6 1BUUFSO0CKFDU
24. w 1ZUIPOͷMJTUͱ͸ҧ͏ڍಈ
    w ศརͳϝιου͕ੜ͑ͯΔ 1 plain_list = [0,1,2,3] 2 plain_pattern = P[0,1,2,3] 3 4 # add 5 plain_list + [4,5,6,7] # [0, 1, 2, 3, 4, 5, 6, 7] 6 plain_pattern + [4,5,6,7] # P[4, 6, 8, 10] 7 8 # mul 9 plain_list * 2 # [0, 1, 2, 3, 0, 1, 2, 3] 10 plain_pattern * 2 # P[0, 1, 4, 6] 11 12 plain_pattern.reverse() # P[3,2,1,0] 13 plain_pattern.shuffle() # P[3,1,2,0] 14 plain_pattern.trim(3) # P[0,1,2] 15 1BUUFSO0CKFDU
25. 5JNF%FQFOEFOU7BSJBCMFT w ࣌ؒͰมԽ͢Δ஋
    w $MPDLʹґଘ 1 # 4拍ごとに0→1→2→3のように変化 2 time_depend_var = var([0,1,2,3],4) 3 4 # 4拍ごとに0→1→2→3のように徐々に変化 5 time_depend_var_linear = linvar([0,1,2,3],4) 6 7 # Clockに依存するので実行ごとに結果が変わる 8 print(time_depend_var) 9 print(time_depend_var_linear) 10
26. DEMO
27. ͜Εͬͯ1ZUIPOͳͷ͔ɾɾɾʁ
28. 1ZUIPOͷจ๏ʹ౰ͯ͸ΊͯΈΔ
29. 1ZUIPOͷจ๏ͰಡΈղ͘'PY%PU 1 # 何をしているのか？ 2 d1 >> play(“X-O-”) 3 4 # シフト演算子? 5 x = 0b_0001_0001 6 7 # 左シフト演算子 8 bin(x << 3) # 0b_1000_1000 9 # 右シフト演算子 10 bin(x >> 3) # 0b_10 11
30. w ಛघϝιου
    w @@IPHF@@ TFMG 1 class OverrideCall: 2 """ 3 instanceを関数呼び出ししたときの挙動を上書きする 4 """ 5 def __call__(self): 6 return 'call' 7 8 foo = OverrideCall() 9 10 foo() # 'call' 1ZUIPOͷจ๏ͰಡΈղ͘'PY%PU
31. w γϑτԋࢉࢠͷಈ͖Λ্ॻ͖ 1 foo = '' 2 3 class OverrideShift: 4 def __rshift__(self, other): 5 return 'override shift' 6 7 bar = OverrideShift() 8 bar >> foo # override shift 9 1ZUIPOͷจ๏ͰಡΈղ͘'PY%PU
32. ú 1 plain_list = [0,1,2,3] 2 plain_pattern = P[0,1,2,3] 3 1ZUIPOͷจ๏ͰಡΈղ͘'PY%PU
33. w EJDUͷΑ͏ʹΞΫηεͨ͠ͱ͖ͷಈ͖Λ্ॻ͖ 1 class ExtDict: 2 def __getitem__(self, args): 3 return args 4 5 d = ExtDict() 6 d['foo', 'bar'] # ('foo', 'bar') 7 1ZUIPOͷจ๏ͰಡΈղ͘'PY%PU
34. ࠓ೔࿩ͨ͜͠ͱ·ͱΊ w ϥΠϒίʔσΟϯάͱ͍͏จԽ
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