Flask WTForms example

References :
Reusing Flask-WTF forms. » BTHLabs
The Flask Mega-Tutorial, Part III: Web Forms - miguelgrinberg.com

ImportError: No module named flask.ext.wtf.Required

old : 

from flask.ext.wtf import Required

new :

from wtforms.validators import Required

References :
python - I'm not able to import Flask-WTF TextField and BooleanField - Stack Overflow

No module named flask.ext.wtf.TextField

Flask-WTF==0.8.3

from flask.ext.wtf import TextField

Flask-WTF==0.10.2

from wtforms import TextField

References :
python - Importing flask.ext.wtf - Stack Overflow