def __call__(self, parser, namespace, value, option_string=None):
            try:
                # check destination and option string
                assert self.dest == 'spam', 'dest: %s' % self.dest
                assert option_string == '-s', 'flag: %s' % option_string
                # when option is before argument, badger=2, and when
                # option is after argument, badger=<whatever was set>
                expected_ns = NS(spam=0.25)
                if value in [0.125, 0.625]:
                    expected_ns.badger = 2
                elif value in [2.0]:
                    expected_ns.badger = 84
                else:
                    raise AssertionError('value: %s' % value)
                assert expected_ns == namespace, ('expected %s, got %s' %
                                                  (expected_ns, namespace))
            except AssertionError:
                e = sys.exc_info()[1]
                raise ArgumentParserError('opt_action failed: %s' % e)
            setattr(namespace, 'spam', value)
dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/test/test_argparse.py/TestActionUserDefined.OptionalAction.__call__/original