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python中字符串的内建函数如下:
可以通过 help( )函数去了解这些内建函数的具体用法,比如:
>>> help(str.strip)
Help on method_descriptor: strip(...) S.strip([chars]) -> string or unicode Return a copy of the string S with leading and trailing whitespace removed. If chars is given and not None, remove characters in chars instead. If chars is unicode, S will be converted to unicode before stripping >>>