Method _failure_header

Lib/doctest.py:1321–1338

(self, test, example)

            'Exception raised:\n' + _indent(_exception_traceback(exc_info)))

    def _failure_header(self, test, example):
        red, reset = (
            (ANSIColors.RED, ANSIColors.RESET) if can_colorize() else ("", "")
        )
        out = [f"{red}{self.DIVIDER}{reset}"]
        if test.filename:
            if test.lineno is not None and example.lineno is not None:
                lineno = test.lineno + example.lineno + 1
            else:
                lineno = '?'
            out.append('File "%s", line %s, in %s' %
                       (test.filename, lineno, test.name))
        else:
            out.append('Line %s, in %s' % (example.lineno+1, test.name))
        out.append('Failed example:')
        source = example.source
        out.append(_indent(source))
        return '\n'.join(out)

    #/////////////////////////////////////////////////////////////////
    # DocTest Running