str常用

def replace(self, *args, **kwargs):  # real signature unknown
        """
        替换字符串
          count
            Maximum number of occurrences to replace.
            -1 (the default value) means replace all occurrences.

        If the optional argument count is given, only the first count occurrences are
        replaced.
        """
        pass

def join(self, ab=None, pq=None, rs=None):  # real signature unknown; restored from __doc__
        """
        返回通过指定字符连接序列中元素后生成的新字符串。
        Concatenate any number of strings.

        The string whose method is called is inserted in between each given string.
        The result is returned as a new string.

        Example: '.'.join(['ab', 'pq', 'rs']) -> 'ab.pq.rs'
        """
        pass

def split(self, *args, **kwargs):  # real signature unknown
        """
        Return a list of the words in the string, using sep as the delimiter string.

          sep
            The delimiter according which to split the string.
            None (the default value) means split according to any whitespace,
            and discard empty strings from the result.
          maxsplit
            Maximum number of splits to do.
            -1 (the default value) means no limit.
        """
        pass

def find(self, sub, start=None, end=None):  # real signature unknown; restored from __doc__
        """
        在S中找到子字符串下标，
        在S[start:end]中包含子结点。可选
        参数开始和结束被解释为切片表示法。
        失败返回1。
        """
        return 0

def strip(self, *args, **kwargs):  # real signature unknown
        """
        返回带前导和后导空格的字符串副本。
        如果给定字符而不是None，则删除字符中的字符。
        """
        pass

def upper(self, *args, **kwargs):  # real signature unknown
        """ 返回转换为大写的字符串的副本。 """
        pass

def lower(self, *args, **kwargs):  # real signature unknown
        """ 返回转换为小写的字符串的副本。 """
        pass