parameters: ()
return_statement: return _state.filename()
docstring: Return the name of the file currently being read.
      Before the first line has been read, returns None.
docstring_summary: Return the name of the file currently being read.
      Before the first line has been read, returns None.
docstring_tokens: Return the name of the file currently being read . Before the first line has been read returns None .
function: def filename():
      """
      Return the name of the file currently being read.
      Before the first line has been read, returns None.
      """
      if not _state:
          raise RuntimeError, "no active input()"
      return _state.filename()
function_tokens: def filename ( ) : if not _state : raise RuntimeError , "no active input()" return _state . filename ( )