验证

验证： 
import re
    from django.forms import Form
    from django.forms import widgets
    from django.forms import fields
    from django.core.exceptions import ValidationError
   def mobile_validate(value):
        mobile_re = re.compile(r'^(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$')
        if not mobile_re.match(value):
            raise ValidationError('手机号码格式错误')
    class PublishForm(Form):
        title = fields.CharField(max_length=20,
                                min_length=5,
                                error_messages={'required': '标题不能为空',
                                                'min_length': '标题最少为5个字符',
                                                'max_length': '标题最多为20个字符'},
                                widget=widgets.TextInput(attrs={'class': "form-control",
                                                              'placeholder': '标题5-20个字符'}))
        # 使用自定义验证规则
        phone = fields.CharField(validators=[mobile_validate, ],
                                error_messages={'required': '手机不能为空'},
                                widget=widgets.TextInput(attrs={'class': "form-control",
                                                              'placeholder': u'手机号码'}))
        email = fields.EmailField(required=False,
                                error_messages={'required': u'邮箱不能为空','invalid': u'邮箱格式错误'},
                                widget=widgets.TextInput(attrs={'class': "form-control", 'placeholder': u'邮箱'}))