code: def get_context(self):
          
          if not self.is_valid():
              raise ValueError(
                  "Cannot generate Context from invalid contact form"
              )
          return dict(self.cleaned_data, site=get_current_site(self.request))
docs: Return the context used to render the templates for the email
          subject and body.
  
          By default, this context includes:
  
          * All of the validated values in the form, as variables of the
            same names as their fields.
  
          * The current ``Site`` object, as the variable ``site``.
  
          * Any additional variables added by context processors (this
            will be a ``RequestContext``).