code: def url_quote_plus(string, charset='utf-8', errors='strict', safe=''):
      
      return url_quote(string, charset, errors, safe + ' ').replace(' ', '+')
docs: URL encode a single string with the given encoding and convert
      whitespace to "+".
  
      :param s: The string to quote.
      :param charset: The charset to be used.
      :param safe: An optional sequence of safe characters.