parameters: (self)
return_statement: return self.get_module().get_filename()
docstring: @rtype:  None or str
          @return: Filename of the main module.
              C{None} if the filename is unknown.
function: def get_filename(self):
          """
          @rtype:  None or str
          @return: Filename of the main module.
              C{None} if the filename is unknown.
          """
          return self.get_module().get_filename()
function_tokens: def get_filename ( self ) : return self . get_module ( ) . get_filename ( )