def from_path(self):<EOL>
if self.req is None:<EOL><INDENT>return None<EOL><DEDENT>s = str(self.req)<EOL>if self.comes_from:<EOL><INDENT>if isinstance(self.comes_from, six.string_types):<EOL><INDENT>comes_from = self.comes_from<EOL><DEDENT>else:<EOL><INDENT>comes_from = self.comes_from.from_path()<EOL><DEDENT>if comes_from:<EOL><INDENT>s += '<STR_LIT>' + comes_from<EOL><DEDENT><DEDENT>return s<EOL>
Format a nice indicator to show where this "comes from"