Python 如何使用WTForms验证Form表单中的字段 Python源码

from wtforms import Form, BooleanField, StringField, PasswordField from wtforms.validators import DataRequired,Length,Email,EqualTo class RegistrationForm(Form): username = StringField( '用户名', [DataRequired(),Length(min=4, max=25,message="请填写4-25位长度的用户名")], render_kw = {'class': 'form-control', 'placeholder': '请填写4-25位长度的用户名'} ) email = StringField( '邮箱', [DataRequired(),Email(message="请填写正确格式的邮箱")], render_kw={'class': 'form-control', 'placeholder': '请填写邮箱'} ) password = PasswordField( '密码', [DataRequired(),Length(min=6, max=20,message="请填写6-20位长度的用户名")], render_kw={'class': 'form-control', 'placeholder': '请填写密码'} ) confirm = PasswordField( '确认密码', [DataRequired(),EqualTo('password', message='2次输入密码必须匹配')], render_kw={'class': 'form-control', 'placeholder': '请再次确认密码'} ) accept_tos = BooleanField( '接收注册协议', [DataRequired()], )