ࢲͷ஌Βͳ͍
1ZUIPOͷੈք !NBTTZVV
1Z'VLVPLB

 ʙσίϨʔλʔΛͦ͑ͯʙ 

ࣗݾ঺հ !NBTTZVV
1ZUIPO͸झຯͰ࢖ͬͯ·͢
͔Β͋͛ΛࡇΓਸΊΔΤϯδχϟʔ
ϑϩϯτ͔ΒόοΫΤϯυ·Ͱ޿͘ઙ͘


4PTJBM







UXJUUFS

NBTT@TTO






DPOOQBTTɿNBTTZVV 

ࠓ೔ͷ͓࿩͸
1ZUIPOΛ࢖͍࢝Ίͯ
ʮ΄΄͏ʯ
ͱࢥͬͨ͜ͱΛ
5JQTతʹ·ͱΊ·ͨ͠ 

ࠓ೔ͷ͓࿩͸
1ZUIPOΛ࢖͍࢝Ίͯ
ʮ΄΄͏ʯ
ͱࢥͬͨ͜ͱΛ
5JQTతʹ·ͱΊ·ͨ͠ 

ࠓ೔ͷ͓࿩͸
ߴ֊ؔ਺ͬͯͳΜ͡Ό͍ʁ
σίϨʔλʔͬͯͳΜ͡Ό͍ʁ
ͱ͍͏͓࿩Ͱ͢ 

͓඼ॻ͖ ɾpMUFSɺNBQɺSFEVDF
ɾߴ֊ؔ਺
ɾσίϨʔλʔ
ɾδΣωϨʔλʔ
ɾ಺แදهͱ͔ͱ͔ 

஫ҙ ࠓճ͸1ZUIPOͰͷ͓࿩Ͱ͢
ʢ1ZUIPOͱ͸ॻ͖ํ͕ҟͳΔ৔߹͕͋Γ·͢ʣ 

pMUFS
NBQ ΠςϨʔλΛ౉͢ͱɺͦΕͧΕରԠͨ͠ॲཧΛߦͬͯ
ΠςϨʔλΛฦͯ͘͠ΕΔ
ʢิ଍ʣ
ɹɹɹ1ZUIPOɿΠςϨʔλΛฦ͢
ɹɹɹ1ZUIPOɿϦετΛฦ͢ 

pMUFS ৚݅ʹҰக͢ΔཁૉͷΈΛநग़͢Δ
ྫ
#ۮ਺Λฦ͢ def is_even(val): if val % 2 == 0: return val print(list(filter(is_even, range(1,10)))) >>>[2, 4, 6, 8] #LambdaΛ࢖ͬͯॻ͘ͱ print(list(filter(lambda x: x % 2 == 0, range(1, 10)))) >>>[2, 4, 6, 8] 

NBQ શͯͷཁૉʹॲཧΛߦͬͨ݁ՌΛฦ͢
ྫ
#ഒฦͩ͠ʂ def double(val): return val * 2 print(list(map(double, range(1,10)))) >>>[2, 4, 6, 8, 10, 12, 14, 16, 18] #LambdaΛ࢖ͬͯॻ͘ͱ print(list(map(lambda x: x * 2, range(1, 10)))) >>>[2, 4, 6, 8] 

SFEVDF શͯͷཁૉΛ·ͱΊΔ
ʢ1ZUIPȌͰ͸GVODUPPMTͷΠϯϙʔτ͕ඞཁʣ
ྫ
import functools #ͻͨ͢Β଍ͯ͠ฦ͢ def add(val1, val2): return val1 + val2 print(functools.reduce(add, range(1,10))) >>>45 #LambdaΛ࢖ͬͯॻ͘ͱ print(functools.reduce(lambda x, y:x + y, range(1,10))) >>>45 

ߴ֊ؔ਺ ߴ֊ؔ਺͸ؔ਺ΛҾ਺ʹͨ͠Γɺ͋Δ͍͸ؔ਺Λ໭Γ஋ͱ͢Δ΋ͷͰ͋Γɺ Ҿ਺΍໭Γ஋ͷؔ਺΋·ͨߴ֊ؔ਺ͱͳΓಘΔɻ 8JLJ1FEJBʹΑΔͱ 

ߴ֊ؔ਺ Ҿ਺ʹؔ਺Λ࣋ͭؔ਺
໭Γ஋͕ؔ਺ʹͳΔؔ਺
΄΄͏ɾɾɾʁ ߴ֊ؔ਺͸ؔ਺ΛҾ਺ʹͨ͠Γɺ͋Δ͍͸ؔ਺Λ໭Γ஋ͱ͢Δ΋ͷͰ͋Γɺ Ҿ਺΍໭Γ஋ͷؔ਺΋·ͨߴ֊ؔ਺ͱͳΓಘΔɻ 8JLJ1FEJBʹΑΔͱ 

ͨͱ͑͹͜Μͳߴ֊ؔ਺ PVUFS ͷҾ਺ʹIFMMP Λ౉͢
PVUFS ͷதͰJOOFS Λฦͯ͠Δ #࣮ߦલޙʹςΩετΛࠩ͠ࠐΉΑʂ def outer(func): def inner(): print("before execute") func() print("after execute") return inner() #͜Μʹͪ͸PyFukuoka def hello(): print ("Hello PyFukuoka!") #࣮ߦ outer(hello) >>> before execute >>> Hello PyFukuoka! >>> after execute 

࣮ߦ͞Ε͍ͯΔؔ਺ ࣮ߦ͍ͯ͠Δͷ͸PVUFS
ผ్IFMMP Λݺͼग़͢͜ͱ΋Մೳ #࣮ߦલޙʹςΩετΛࠩ͠ࠐΉΑʂ def outer(func): def inner(): print("before execute") func() print("after execute") return inner() #͜Μʹͪ͸PyFukuoka def hello(): print ("Hello PyFukuoka!") #࣮ߦ outer(hello) >>> before execute >>> Hello PyFukuoka! >>> after execute 

ݩͷؔ਺Λ௥Ճ͍͍ͯͪͪ͠ݺͼग़͢ͷʁ ʮ͜ͷؔ਺ΛݺͿͱ͖͸ઈରʹηοτͰݺͿॲཧʯ
ͬͯ͋Γ·ͤΜʁ
ͨͱ͑͹ɺ
ɾϩάΠϯ൑ఆ͸ඞͣ΍Βͳ͍ͱ͍͚ͳ͍
ɾ*O0VUͰϩάग़ྗ͕ඞཁʢࣗྗ4UBDL5SBDFʣ
ͳͲͳͲɾɾ
͍͍ͪͪ౉ͯ͠ݺͼग़͢ͷ໘౗Ͱ͢ΑͶʁ 

ͦ͜ͰσίϨʔλʔ ؆୯ʹ͍͏ͱɺߴ֊ؔ਺ͷϥούʔ
ؔ਺ఆٛ࣌ʹʮˏϚʔΫʯΛ͚ͭΔ͜ͱͰɺ
ఆٛ͞Εͨؔ਺Λ࣮ߦ͢Δͱ͖ʹࣗಈతʹߴ֊ؔ਺
Λݺͼग़͢͜ͱ͕Ͱ͖Δ 

ͨͱ͑͹ ઌ΄Ͳͷίʔυ #࣮ߦલޙʹςΩετΛࠩ͠ࠐΉΑʂ def outer(func): def inner(): print("before execute") func() print("after execute") return inner() #͜Μʹͪ͸PyFukuoka def hello(): print ("Hello PyFukuoka!") #࣮ߦ outer(hello) >>> before execute >>> Hello PyFukuoka! >>> after execute 

IFMMP Λϥοϐϯά σίϨʔλʔΛ࢖͏ͱ #࣮ߦલޙʹςΩετΛࠩ͠ࠐΉΑʂ def outer(func): def inner(): print("before execute") func() print("after execute") return inner() #͜Μʹͪ͸PyFukuoka @outer def hello(): print ("Hello PyFukuoka!") #࣮ߦ hello() >>> before execute >>> Hello PyFukuoka! >>> after execute IFMMP
Λݺͼग़ͯ͠΋݁Ռ͸มΘΒͣ 

IFMMP Λϥοϐϯά σίϨʔλʔΛ࢖͏ͱ #࣮ߦલޙʹςΩετΛࠩ͠ࠐΉΑʂ def outer(func): def inner(): print("before execute") func() print("after execute") return inner() #͜Μʹͪ͸PyFukuoka @outer def hello(): print ("Hello PyFukuoka!") #࣮ߦ hello() >>> before execute >>> Hello PyFukuoka! >>> after execute ΍ͬͯΔ͜ͱ͸
EFG
IFMMP 






QSJOU
lIFMMP
1Z'VLVPLBz
IFMMP

PVUFS IFMMP
IFMMP
ͱಉ͜͡ͱ 

࣮ߦ͞Ε͍ͯΔ໊લʹ஫ҙ ͜ͷ৔߹ɺPVUFSσίϨʔλʔΛద༻ͨ࣌͠఺Ͱ #࣮ߦલޙʹςΩετΛࠩ͠ࠐΉΑʂ def outer(func): def inner(): print("before execute") func() print("after execute") return inner() #͜Μʹͪ͸PyFukuoka @outer def hello(): print ("Hello PyFukuoka!") #࣮ߦ͞Ε͍ͯΔؔ਺໊ print(hello.__name__) >>> inner ࣮ࡍʹ࣮ߦ͞ΕΔؔ਺͕ೖΕସΘΔ 

΋ͱͷؔ਺৘ใΛอ͓࣋ͯͨ͘͠Ίʹ͸ GVODUPSTXSBQTσίϨʔλΛ࢖͏ 

GVODUPPMTXSBQTΛσίϨʔτ͢Δ ݩʑͷؔ਺৘ใΛͦͷ··දࣔ͢Δ͜ͱ͕Ͱ͖ΔΑ͏ʹͳͬͨʂ #࣮ߦલޙʹςΩετΛࠩ͠ࠐΉΑʂ def outer(func): @functools.wraps(func) def inner(): print("before execute") func() print("after execute") return inner() #͜Μʹͪ͸PyFukuoka @outer def hello(): print ("Hello PyFukuoka!") #࣮ߦ͞Ε͍ͯΔؔ਺໊ print(hello.__name__) >>> hello 

؆୯ʹ·ͱΊΔͱ ɾߴ֊ؔ਺͸Ҿ਺΍໭Γ஋ʹؔ਺͕͋Δؔ਺
ɾσίϨʔλʔΛ࢖͏ͱߴ֊ؔ਺ͷهड़͕؆୯ʹͳΔ
ɾݩؔ਺ͷ৘ใΛอ࣋͢Δʹ͸GVODUPPMTXSBQTΛ࢖͏ 

͓·͚ ࣮ߦݩͷؔ਺ʹҾ਺͕͋Δ৔߹ import functools def outer(func): @functools.wraps(func) def inner(*args, **kwargs): print("before execute") func(*args, **kwargs) print("after execute") return inner @outer() def hello(*args, **kwargs): print(args[0]) print(kwargs["kwargs1"]) #࣮ߦ hello("hello", kwargs1 = "PyFukuoka") >>> before execute >>> hello >>> PyFukuoka >>> after execute 

͓·͚ σίϨʔλʹ΋࣮ߦݩͷؔ਺ʹ΋Ҿ਺͕͋Δ৔߹ import functools def outer(*dec_args, **dec_kwargs): def middle(func): @functools.wraps(func) def inner(*args, **kwargs): print(dec_args[0]) print("before execute") func(*args, **kwargs) print("after execute") print(dec_kwargs["dec_kwargs1"]) return inner return middle #͜Μʹͪ͸PyFukuoka @outer("decorator args1", dec_kwargs1 = "decorator kwargs1") def hello(*args, **kwargs): print(args[0]) print(kwargs["kwargs1"]) #࣮ߦ hello("hello", kwargs1 = "PyFukuoka") >>> decorator args1 >>> before execute >>> hello >>> PyFukuoka >>> after execute >>> decorator kwargs1 

͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠