Whats wrong with an assignment

what's wrong?

File "trunk/website/auth/user/emailchange/views.py" in email_change_view

102. context['form'] = form

File "/usr/local/lib/python2.6/dist-packages/django/template/context.py" in __setitem__

39. self.dicts[-1][key] = value

Exception Type: TypeError at /accounts/email/change/ Exception Value: 'SendUsernameForm' object does not support item assignment

Here is the Code

else:
    form = EmailChangeForm(username=request.user.username)

context = RequestContext(request, extra_context)
context['form'] = form

return render_to_response(template_name, context_instance=context)

HTML Code:

<开发者_如何学Pythonform method="post">{% csrf_token %}
            {{ form.as_p }}
            <p><input type="submit" value="Change email address" /></p>
</form>

Any ideas?

Add form to extra_context dic, not context.

The error is literally saying, context['form'] is invalid, so it's a good place to start wondering if RequestContext should be used in that fashion.

RequestContext docs: http://docs.djangoproject.com/en/dev/ref/templates/api/#django.template.RequestContext

else:
    form = EmailChangeForm(username=request.user.username)

extra_context['form'] = form
context = RequestContext(request, extra_context)