python - Tornado and WTForms -

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i using wtforms first time. using wtforms validate post requests in tornado below forms forms.py

class userform(form):     user = textfield('user', [validators.length(min=23, max=23)])

in tonado handler have 

def post(self):     form = userform(self.request.body)

the error message is: formdata should multidict-type wrapper supports 'getlist' method"

how make work?

wtforms-tornado 0.0.1

wtforms extensions tornado.

pip install wtforms-tornado

wtforms-tornado


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