Geeks, please accept the hero post of 2021 Microsoft x Intel hacking contest>>> 
When using the form module, follow the code to type it, and run it without flash. Ext. this module finds a solution through Baidu
Original link https://stackoverflow.com/questions/20032922/no-module-named-flask-ext-wtf
It is mentioned as follows: after PY3, the introduction method has changed
The solution: change the introduction mode to:
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