Simple way to add a ReCaptcha field to your admin login page.

1. Install django-captcha-admin from pypi:

   $> pip install django-captcha-admin

2. Add captcha_admin and captcha to your INSTALLED_APPS:

   INSTALLED_APPS = (
       ...
       'captcha_admin',
       'captcha',
   )

3. Add your captcha keys to your settings, the way django-recaptcha indicates:

   RECAPTCHA_PUBLIC_KEY = 'your-public-key'
   RECAPTCHA_PRIVATE_KEY = 'your-private-key'
   # If I'm not a Robot is required add:
   NOCAPTCHA = True

4. Edit your code so instead of importing admin from django.contrib, you import it from captcha_admin:

   from captcha_admin import admin
   
   # This should stay the same
   admin.autodiscover()
   
   urlpatterns = patterns(
       ...
       url(r'^admin/', include(admin.site.urls)),  # and this...
       ...
   )

That's it!