docs: def addslashes(s, escaped_chars=None):
      """Add slashes for given characters. Default is for ``\`` and ``'``.
  
      :param s: string
      :param escaped_chars: list of characters to prefix with a slash ``\``
      :return: string with slashed characters
      :rtype: str
  
      :Example:
          >>> addslashes("'")
          "\\'"
      """
      if escaped_chars is None:
          escaped_chars = ["\\", "'", ]
  
      # l = ["\\", '"', "'", "\0", ]
      for i in escaped_chars:
          if i in s:
              s = s.replace(i, '\\' + i)
      return s