16.登录功能完成 (1)front/forms.py class SigninForm(BaseForm): telephone = StringField(validators=[Regexp(r'1[3578]\d{9}', message='请输入正确格式的手机号码')]) password = StringField(validators=[Regexp(r'[0-9a-zA-Z_\.]{6,15}', message='请输入正确格式的密码')]) remember=StringFi…