向wtforms.widgets html5 NumberInput添加最小值和最大值

from wtforms.widgets.html5 import NumberInput

class CustomNumberInput(NumberInput):
    def __call__(self, field, **kwargs):
        if 'min' not in kwargs and field.min:
            kwargs['min'] = field.min
        if 'max' not in kwargs and field.max:
            kwargs['max'] = field.max
        return super().__call__(field, **kwargs)

from wtforms import Form, IntegerField
from wtforms.validators import NumberRange

class MyForm(Form):
    my_number = IntegerField('My Number', widget=CustomNumberInput(), validators=[NumberRange(min=0, max=100)])