[python] 대소 문자를 구분하지 않는 ‘입력’

난 당신이 비 침습적 수 있도록 래퍼를 만들 것 입니다. 최소한, 예를 들어 … :

class CaseInsensitively(object):
    def __init__(self, s):
        self.__s = s.lower()
    def __hash__(self):
        return hash(self.__s)
    def __eq__(self, other):
        # ensure proper comparison between instances of this class
        try:
           other = other.__s
        except (TypeError, AttributeError):
          try:
             other = other.lower()
          except:
             pass
        return self.__s == other

이제 if CaseInsensitively('MICHAEL89') in whatever:필요에 따라 동작해야합니다 (오른쪽이 목록, dict 또는 set인지 여부). (문자열 포함에 대해 비슷한 결과를 얻으려면 더 많은 노력이 필요할 수 있습니다 unicode.

답변

class NameList(object):
    def __init__(self, names):
        self.names = names

    def __contains__(self, name): # implements `in`
        return name.lower() in (n.lower() for n in self.names)

    def add(self, name):
        self.names.append(name)

# now this works
usernames = NameList(USERNAMES)
print someone in usernames

if 'MICHAEL89'.casefold() in (name.casefold() for name in USERNAMES):

if 'MICHAEL89'.casefold() in map(str.casefold, USERNAMES):

if string1.lower() in string2.lower():
    ...

if 'MICHAEL89' in map(lambda name: name.upper(), USERNAMES):
   ...

matcher = re.compile('MICHAEL89', re.IGNORECASE)
filter(matcher.match, USERNAMES) 

matcher = re.compile('MICHAEL89', re.IGNORECASE)
if any( ifilter( matcher.match, USERNAMES ) ):
    #your code here