下面是一个示例代码,演示如何忽略大小写进行字符检查: defcontains_char_ignore_case(string,char):string_lower=string.lower()char_lower=char.lower()ifchar_lowerinstring_lower:returnTrueelse:returnFalse# 调用函数进行测试print(contains_char_ig
正则表达式模块re提供了更强大的模式匹配功能。通过re.search(pattern,string)可进行模糊匹配，支持通配符、字符集等高级特性。例如检测是否存在数字：ifre.search(r’'̣, string)。当需要复杂模式匹配时首选，但正则表达式存在编译耗时，简单匹配时效率不如in关键字。对于需要同时检测多个子串的情况，可结合列表推导式...
a=102content ="this is a very long string contains: %s, %s"%(string.ascii_lowercase, string.ascii_uppercase)ifnot(len(content)==0):if( (1+2) % (4+3) ) ==1andaisnotNone:pass 使用flake8 检查后得到的结果将会是这样: $ flake8 main.py main.py:1:1: F401'os'imported but unused ...
) | S.isupper() -> bool | | Return True if all cased characters in S are uppercase and there is | at least one cased character in S, False otherwise. | | join(...) | S.join(iterable) -> str | | Return a string which is the concatenation of the strings in the | iterable....
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What's the recommended operator to check if a string contains a substring?Show/Hide How can you generalize a substring check to ignore case sensitivity?Show/Hide How can you count how often a substring appears in a string?Show/Hide How can you find the position of a substring within ...
4.6.__contains__(self, item) 成员运算符in/not in的行为 item in self或item not in self # 重写方法返回值会变成布尔值,当使用not in时,True会变成False,False会变成True 补充:描述器(Descriptor) 1.概念 描述器是具有“绑定行为”的对象属性,其属性访问已被描述器协议中的方法所重载,包括__get__(),...
Perform a string formatting operation. The format_string argument can contain literal text or replacement fields delimited by braces {}. Each replacement field contains either the numeric index of a positional argument, or the name of a keyword argument. Returns a copy of format_string where each...
一、string的方法 >>>dir(str) ['__add__', '__class__', '__contains__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__gt__', '__hash__', '__init__', '__init_...
The string is never truncated. """ pass def __add__(self, *args, **kwargs): # real signature unknown """ Return self+value. """ pass def __contains__(self, *args, **kwargs): # real signature unknown """ Return key in self. """ pass def __eq__(self, *args, **kwarg...