Django MultiValueField with RadioSelect example

@H@CHOICES = (('x', 'Choice x'), ('y', 'Choice y'))

class MyWidget(MultiWidget):
    def __init__(self, attrs=None):
        widgets = (RadioSelect(choices=CHOICES, attrs=attrs),
                   TextInput(attrs=attrs))
        super(MyWidget, self).__init__(widgets, attrs)

    def decompress(self, value):
        if value:
            return value
        return ['x', 'hello',]


class MyField(MultiValueField):
    def __init__(self, *args, **kwargs):
        fields = (
            ChoiceField(choices=CHOICES),
            CharField(max_length=100))
        super(MyField, self).__init__(fields=fields, *args, **kwargs)

    def compress(self, data_list):
        if data_list:
            return [data_list[0], data_list[1]]
        return [None, None]