Python django.forms 模块，MultiValueField() 实例源码

def __init__(self, field_items, skip_check=False, *args,
                 **kwargs):
        self.field_dict = OrderedDict(field_items)
        self.skip_check = skip_check
        # Make sure no subfield is named 'SKIP_CHECK_NAME'. If
        # skip_check is True this field will clash with the addtional
        # subfield added by the DictCharField constructor.  We perform
        # this check even if skip_check=False because having a field named
        # 'skip_check' that isn't used to actually skip the checks would be
        # very confusing.
        if SKIP_CHECK_NAME in self.field_dict:
            raise RuntimeError(
                "'%s' is a reserved name "
                "(it can't be used to name a subfield)." % SKIP_CHECK_NAME)
        # if skip_check: add a BooleanField to the list of fields, this will
        # be used to skip the validation of the fields and accept arbitrary
        # data.
        if skip_check:
            self.field_dict[SKIP_CHECK_NAME] = forms.BooleanField(
                required=False)
        self.names = [name for name in self.field_dict]
        # Create the DictCharWidget with init values from the list of fields.
        self.fields = list(self.field_dict.values())
        self.widget = DictCharWidget(
            [field.widget for field in self.fields],
            self.names,
            [field.initial for field in self.fields],
            [field.label for field in self.fields],
            skip_check=skip_check,
            )
        # Upcall to Field and not MultiValueField to avoid setting all the
        # subfields' 'required' attributes to False.
        Field.__init__(self, *args, **kwargs)