python裡textfield_python-django.forms中缺少TextField

from django import forms

class UserForm(forms.ModelForm):

first_name = forms.TextField(label=_(u'First name'), required=False)

last_name = forms.TextField(label=_(u'Last name'))

它給我一個“ AttributeError：'子產品'對象沒有屬性'TextField'。似乎一切正常，但缺少TextField：

ipdb> forms

ipdb> forms.

forms.BaseForm forms.EmailField forms.MultiWidget forms.TypedChoiceField

forms.BaseModelForm forms.Field forms.MultipleChoiceField forms.TypedMultipleChoiceField

forms.BooleanField forms.FileField forms.MultipleHiddenInput forms.URLField

forms.CharField forms.FileInput forms.NullBooleanField forms.ValidationError

forms.CheckboxInput forms.FilePathField forms.NullBooleanSelect forms.Widget

forms.CheckboxSelectMultiple forms.FloatField forms.PasswordInput forms.fields

forms.ChoiceField forms.Form forms.RadioSelect forms.fields_for_model

forms.ClearableFileInput forms.HiddenInput forms.RegexField forms.forms

forms.ComboField forms.IPAddressField forms.Select forms.formsets

forms.DEFAULT_DATETIME_INPUT_FORMATS forms.ImageField forms.SelectMultiple forms.model_to_dict

forms.DEFAULT_DATE_INPUT_FORMATS forms.IntegerField forms.SlugField forms.models

forms.DEFAULT_TIME_INPUT_FORMATS forms.Media forms.SplitDateTimeField forms.save_instance

forms.DateField forms.MediaDefiningClass forms.SplitDateTimeWidget forms.util

forms.DateInput forms.ModelChoiceField forms.TextInput forms.widgets

forms.DateTimeField forms.ModelForm forms.Textarea

forms.DateTimeInput forms.ModelMultipleChoiceField forms.TimeField

forms.DecimalField forms.MultiValueField forms.TimeInput

任何想法？