Django的forms表单组件批量设置字段样式

from django import forms
from . import models
class UserInfoModelForms(forms.ModelForm):
    class Meta:
        model = models.UserInfo
        fields = "__all__"

    def __init__(self,*args,**kwargs):
        super(UserInfoModelForms, self).__init__(*args,**kwargs)
        for name,field in self.fields.items():
            field.widget.attrs['class'] = 'form-control'