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HTTP/2 200 date: Sun, 26 Jul 2026 07:37:33 GMT content-type: text/html server: nginx vary: Accept-Encoding x-frame-options: SAMEORIGIN strict-transport-security: max-age=31536000 content-encoding: gzip ?mPython?N?C?Y?n?ċA?ŊK??v?Z?A?????Ƃł??Ă?H?@?ċA?֐??ōċN?s?\?H?FPython?X?e?b?v?A?b?v?N?C?Y - ??IT

?mPython?N?C?Y?n?ċA?ŊK??v?Z?A?????Ƃł??Ă?H?@?ċA?֐??ōċN?s?\?H?FPython?X?e?b?v?A?b?v?N?C?Y

?ċA?֐??͎??????g???֐??̓????ŌĂяo???֐??ł??BPython?ł????????g???܂??B?ł??A?????ɂ͂?????Ƃ?????????????܂???B?m???Ă܂??????H

» 2025?N03??11?? 05??00?? ???J

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???̋L???͉??????ł??B????o?^?i?????j????ƑS?Ă????????????܂??B

?A?ږڎ?

$1000?̊K??͕\???????H?@????Ȃ??H?@?ǂ????H$ 1000?̊K??͕\???????H?@????Ȃ??H?@?ǂ????H

?y???z

?@?ȉ??Ɏ???fact?֐??̓p?????[?^?[n?ɓn???ꂽ?????l?̊K???Ԃ??B?Ō?̍s?ł́A1000???w?肵?Ă??̊֐????Ăяo???Ă???B???̊֐???1000?̊K???Ԃ??i?????āAprint?֐????????\??????j???낤???H?@?Ԃ??Ȃ????낤???H?@?Ԃ??Ȃ??Ƃ????炻?̗??R?͉????낤?iPython?̎??s???̐ݒ?͓??ɕύX???Ă??Ȃ????̂Ƃ???j?B

def fact(n):
    if n == 0:
        return 1
    else:
        return n * fact(n-1)

print(fact(1000))

1000?̊K??͕\???????H?@????Ȃ??H?@?ǂ????H

?@?ǂ???HP???킳???ł??B

?@???A???ƂȂ???蕶??if-else???ɂ??Ă??܂????ǁA?ȉ??̂悤?ȏ??????̕????V???v???ł??ˁB

def fact(n):
    if n == 0:
        return 1
    return n * fact(n-1)

print(fact(1000))

else?߂ɓ???Ȃ??Ă??????񂶂?Ȃ?????

?@??x????????????̂ŁA????͖?蕶?̊????Ői?߂Ă??????Ƃɂ??܂??傤?B?Ƃ??????A?F????͂ǂ????̏????????D???Ȃ̂??ȁH

?y?????z

?@???̃R?[?h?????s???????ʂ??ȉ??Ɏ????܂??B

RecursionError??O??????????

?@?Ƃ????킯?ŁA?uRecursionError??O?????????A1000?̊K??͕Ԃ???Ȃ??v?Ƃ????̂??????i?̈ꕔ?j?ƂȂ?܂??B???̗??R?ɂ??Ă͉???p?[?g?Ō??Ă????܂??傤?B

?@?{???͂??킢???????R??2???ڂ̉摜?͂??????܂???B??ϐ\???󂠂?܂???B?????āA?ǂ?Ȋ????ɂ???΂????̂??A?v???t???Ȃ??????񂾂???B

?y????z

?@???ɂ?????fact?֐??͎??g???ċA?I?ɌĂяo?????ƂŊK????v?Z???܂??B

def fact(n):
    if n == 0:
        return 1
    else:
        return n * fact(n-1)

fact?֐??͍ċA?Ăяo???ɂ??K????v?Z????

?@?????āAPython?ł͍ċA?Ăяo???̉񐔂ɐ?????݂??Ă??܂??B?Ȃ????Ƃ????ƁA?֐??Ăяo?????????ɍċA???āA?֐??̌Ăяo???X?^?b?N???I?[?o?[?t???[???邱?Ƃ?????邽?߂ł??B?ő?񐔂𒴂????RecursionError??O?????????܂??B???̍ő?񐔂?sys???W???[????getrecursionlimit?֐??Ŏ擾???āA??????sys???W???[????setrecursionlimit?֐??Őݒ?\?ł??B

?@?ȉ???getrecursionlimit?֐??ōċA?̍ő?񐔂𒲂ׂ?R?[?h?̗?ł??B

import sys

print(sys.getrecursionlimit())

getrecursionlimit?֐??ōċA?̍ő?񐔂𒲂ׂ?

?@???s???????ʂ??ȉ??Ɏ????܂??B

CPython?ł?1000?񂪃f?t?H???g?l

?@?茳?̊??imacOS?AWindows 10?j?p??CPython?ł?getrecursionlimit?֐??̖߂?l??1000?ł??B?܂?A?ő?̍ċA?̉񐔂?1000??ɂȂ?܂??ˁB?u?ő?̍ċA?񐔂?1000?ŁA1000?̊K????v?Z???悤?Ƃ??Ă???񂾂???M?????Ƃ??Ȃ?񂶂?Ȃ??H?v?Ǝv???l?????邩??????܂???B???A???炭?A?Θb?????N??????܂łɃX?^?b?N?????ɏ????Ă???悤?ŁA?ufact(1000)?v?Ăяo???͕M?҂̎茳?̊??ł͂ǂ???ł?RecursionError??O?????????܂????B

?@?ł́Asetrecursionlimit?֐??ōő?̍ċA?񐔂?ݒ肵?Ă݂܂??傤?B

sys.setrecursionlimit(1010)

def fact(n):
    if n == 0:
        return 1
    else:
        return n * fact(n-1)

print(fact(1000))

?ċA?̍ő?񐔂?1010?ɂ?????1000?̊K?悪?o?͂???邩?ȁH

?@???s???ʂ͈ȉ??̒ʂ?ł??B

?v?Z???ꂽ?I

?@?Ƃ܂??A?????܂ł͂????ɕ????邨?b???ł??B???APython 3.10?ȑO??Python 3.11?ȍ~?ł͂?????Ƃ????f?₪????܂??B?ڂ?????python.jp?ɂ???uPython 3.11?̐V?@?\(????3?j?֐??Ăяo???̃C?????C?????v?Ȃǂ??Q?l?ɂ??Ăق????̂ł????APython 3.11?ł́iPython?Ŏ???????Ă???j?֐??̌Ăяo?????C?????C????????܂????B

?@?֐??Ăяo???̃C?????C?????????????ڍׂɏ????̂͂??̋L???ł͑?ςȂ̂ŏȗ????܂????A?ȒP?ɂ????΁A?C?????C?????̕???p?ɂ???āAPython?Ŏ???????Ă???֐??̍ċA?Ăяo?????i???ۂɂ́j????ł??s????悤?ɂȂ????Ƃ??????Ƃł??B????ł??Ȃ??A?ċA?̍ő吔??1000??ɐݒ肳??Ă???̂ŁA?ʏ?͍ċA???[???Ȃ??RecursionError??O?????????܂??B

?@Python 3.11?ōs??ꂽ?֐??Ăяo???̃C?????C?????͂????܂ł??APython?R?[?h?̎??s???????????邽?߂̂??̂ł??邱?Ƃɂ͒??ӂ??Ă????????BPython?R?[?h??]?????Ď??s????R?[?h??C????ŏ?????Ă??܂????i?????ceval?֐??ƌĂт܂??j?APython 3.10?܂ł͊֐????Ăяo????邽?тɁA???̕]???֐????ċA?I?ɌĂяo???Ă??܂????B???????APython 3.11?ł͂??̍ċA?Ăяo?????????ɂ??āAgoto???ɂ?郋?[?v?ŏ???????悤?ɂ????̂ł??B?֐??Ăяo???ł͂Ȃ??Agoto???ɂ?郋?[?v?Ȃ̂ŁA?֐??Ăяo???ɔ????X?^?b?N????Ȃ??Ȃ?A???̌??ʂƂ??čċA?Ăяo?????????I?ɂ͖????ɍs????悤?ɂȂ????ƕM?҂͗??????Ă??܂??B

?@?Ⴆ?΁A???̊֐????l???Ă݂܂??傤?B

import sys

def foo(n):
    if n == 0:
        print('recursion call finished')
        return
    else:
        foo(n-1)

sys.setrecursionlimit(1000000)
foo(100000)

?ċA?Ăяo?????邾???̊֐?

?@???̃R?[?h?͍ċA?̍ő?񐔂?100????ɐݒ肵?āA?ċA????񐔂?10??????w?肵??foo?֐????Ăяo?????̂ł??i?ő?񐔂̕???1???????j?B

?@?????Python 3.10???Ŏ??s????Ǝ??̂悤?ɂȂ?܂??iWindows?j?B

???????킸??Python???I?????Ă???i?v?????v?g???udeep?v?ɂȂ??Ă???_?ɒ??ځI?j

?@???????킸?ɁA?v?????v?g??Python?̑Θb???ł͂Ȃ??A?R?}???h?v?????v?g?̂??̂ɂȂ??Ă???_?ɒ??ڂ??Ă????????B????́Asetrecursionlimit?֐??Őݒ肵??????ɓ͂??????O?ɃX?^?b?N?̈???g???ʂ????Ă??܂??āA???̌??ʁAPython?????n???̂??̂??????Ă??邱?Ƃ????????Ă??܂??imacOS??UNIX?n????OS?Ȃ?segmentation fault??????????ł??傤?j?B

?@?΂??āAPython 3.11?ŏ?̃R?[?h?????s????Ƃǂ??Ȃ?ł??傤?iWindows?j?B

$?????Ƃ??Ȃ??v???O?????̎??s???I?????A?urecursion call finished?v?ƕ\?????ꂽ$ ?????Ƃ??Ȃ??v???O?????̎??s???I?????A?urecursion call finished?v?ƕ\?????ꂽ

?@Python?????n???????邱?Ƃ??Ȃ??A?ċA?Ăяo???????????āA?urecursion call finished?v?ƕ\??????Ă??܂??B

?@?Ƃ????悤?ɁAPython 3.11?ȍ~?ł͍ċA?Ăяo???ɑ΂??鐧??͊ɂ????̂ɂȂ??Ă??܂??B????ł??A?ċA?̉񐔂̍ő?l??1000??̂܂܂Ƃ????̂͌???݊????̈ێ??Ƃ????b??????ł??傤???A?u?ċA??????ł???????????ă????߂??Ȃ??悤?ɂˁI?v?Ƃ????J???`?[??????̃??b?Z?[?W????????܂???ˁB

?@Python????ōċA?֐??ɂ??ď????Ă???y?[?W???Љ?悤?Ǝv??????ł????A?????????ĂȂ??炵???ł??i?΁j?B????͍??????B?Ȃ?ŏ????Ă??Ȃ??񂾂낤?Ǝv???????ǁA?N?????R??m??܂??񂩁i?m??킯???Ȃ??j?B?܂??A?C??????????֐??????????L???̂ǂꂩ?ɒǋL???ĉ??????邱?Ƃɂ??܂??傤?B

?uPython?X?e?b?v?A?b?v?N?C?Y?v