parameters: (self)
return_statement: return self.depth == 0
docstring: True if the included file is the input file.
docstring_summary: True if the included file is the input file.
docstring_tokens: True if the included file is the input file .
function: def is_input_file(self):
          """True if the included file is the input file."""
          return self.depth == 0
function_tokens: def is_input_file ( self ) : return self . depth == 0