Method format

Lib/test/test_peepholer.py:721–727

(fmt, *values)

    def test_format_misc(self):
        def format(fmt, *values):
            vars = [f'x{i+1}' for i in range(len(values))]
            if len(vars) == 1:
                args = '(' + vars[0] + ',)'
            else:
                args = '(' + ', '.join(vars) + ')'
            return eval(f'{fmt!r} % {args}', dict(zip(vars, values)))

        self.assertEqual(format('string'), 'string')
        self.assertEqual(format('x = %s!', 1234), 'x = 1234!')