from werkzeug.datastructures import MultiDict
from flaskext.wtf import FlaskForm, StringField, #....
class ContactForm(FlaskForm):
email = StringField('Email', [DataRequired(), Email()])
# ...
submit = SubmitField('Submit')
def reset(self):
data = MultiDict([ ('csrf', self.generate_csrf_token() ) ])
self.process(data)