ValidationError doesn't get printed in my web

[MarcJuegos_YT]

I've been learning django for two weeks now and I'm currently learning raising forms.Errors such as forms.ValidationError.
Here's the code I've written:

def clean_email(self, *args, **kwargs):
    email = self.cleaned_data.get('email')
    if not email.endswith("gmail.com"):
        raise forms.ValidationError("This is not a valid email")
    return email

The problem I have is when I write an email that doesn't contain gmail.com, ValidationError doesn't get printed in the web.

[scidam]

What about your view? You probably forget to call yourform.is_valid() in your corresponding view function.