wtforms內置的校驗器和自定義校驗器的三種方法總結

wtforms框架官方關於自定義校驗器的參考：https://wtforms.readthedocs.io/en/stable/validators.html#setting-flags-on-the-field-with-validators     wtforms內置的校驗器大全 Class wtforms.validators.DataRequired(message=None) 此驗證器將

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