parameters: (self, filename)
return_statement: return filename in self._files
docstring: Whether we have any warnings for the specified file.
docstring_summary: Whether we have any warnings for the specified file.
docstring_tokens: Whether we have any warnings for the specified file .
function: def has_file(self, filename):
          """Whether we have any warnings for the specified file."""
          return filename in self._files
function_tokens: def has_file ( self , filename ) : return filename in self . _files