Form Validation with WTForms — Flask Documentation (3.1.x)
Form Validation with WTForms¶ When you have to work with form data submitted by a browser view, code quickly becomes very hard to read. There are libraries out there designed to make this process easier to manage. One of them is WTForms which we will handle here. If you find yourself in the situation of having many forms, you might want to give it a try. When you are working with WTForms you have
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