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Python Django Forms Forms Create a Validator

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django forms custom validator not passing

I'm not sure why the attached custom validator isn't passing the test?

myproject/forms.py
from django import forms


def not_treehouse(email):
    domain = email.split('@')[1]
    domain = domain.lower()
    if domain == 'treehouse.com':
        raise forms.ValidationError('error')


class LeadShareForm(forms.Form):
    email = forms.EmailField()
    link = forms.URLField()
    honeypot = forms.CharField(widget=forms.HiddenInput, required=False)

    def clean_honeypot(self):
        honey = self.cleaned_data['honeypot']
        if len(honey):
            raise forms.ValidationError('Bad robot!')
        return honey

1 Answer