Mock example usage

test.py

def mocked_urlopen_side_effect(url, *args, **kwargs):
    "Returns string content in a file-like interface for a variety of possible URLs."
    
    #StringIO is a file-like object, much like we'd expect urlopen to return
    #responses is a dict (defined elsewhere) containing various string responses as the values for the keys.
    if 'http://search.twitter.com/search.json' in url:
        return StringIO(responses['twitter_success_1'])
    elif 'http://api.twitter.com/1/geo/search.json' in url:
        return StringIO(responses['twitter_geo_success_1'])
    elif 'http://api.flickr.com/services/rest/' in url:
        return StringIO(responses['flickr_success_1'])
    elif 'https://api.instagram.com/v1/media/search' in url or 'https://api.instagram.com/v1/tags/' in url:
        return StringIO(responses['instagram_success_1'])
    elif 'http://maps.googleapis.com/maps/api/geocode/json' in url:
        return StringIO(responses['google_maps'])
    raise Exception('URL unsupported by mocked function.')

def test():
    with mock.patch('urllib2.urlopen') as mocked_urlopen:
        mocked_urlopen.side_effect = mocked_urlopen_side_effect
        
        #call some code that makes a request using urllib2.urlopen
        import_social_media_data()