original_docstring: 
          Parse an input string, returning an instance of the Action subclass 
          if the string was valid.
          
docstring: Parse an input string, returning an instance of the Action subclass
  if the string was valid.
docstring_tokens: Parse an input string returning an instance of the Action subclass if the string was valid .
code: def parse_action(input_str):
          """
          Parse an input string, returning an instance of the Action subclass 
          if the string was valid.
          """
          pass
code_tokens: def parse_action ( input_str ) : pass
short_docstring: Parse an input string, returning an instance of the Action subclass
  if the string was valid.
short_docstring_tokens: Parse an input string returning an instance of the Action subclass if the string was valid .
comment: """
          Parse an input string, returning an instance of the Action subclass 
          if the string was valid.
          """