錯誤代碼：
class RegistForm(Form): deposit = FloatField(validators=[InputRequired])
解決方法：
將InputRequired改為InputRequired()即可
正確代碼：
class RegistForm(Form): deposit = FloatField(validators=[InputRequired()])
{TypeError}__init__() takes from 1 to 2 positional arguments but 3 were given
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