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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def PyParseJoinList(string, location, tokens):
 """Return a joined token from a list of tokens. This is a callback method for pyparsing setParseAction that modifies the returned token list to join all the elements in the list to a single token. Args: string (str):
 original string. location (int):
 location in the string where the match was made. tokens (list[str]):
 extracted tokens, where the string to be converted is stored. """

  join_list = []
  for token in tokens:
    try:
      join_list.append(str(token))
    except UnicodeDecodeError:
      join_list.append(repr(token))

  tokens[0] = ''.join(join_list)
  del tokens[1:]