def open_unknown(self, fullurl, data=None):
        type, url = splittype(fullurl)
        raise IOError, ('url error', 'unknown url type', type)
Ensures that ModelAdmin.response_post_save_change() controls the
dataset/ETHPy150Open kleientertainment/ds_mod_tools/pkg/win32/Python27/Lib/urllib.py/URLopener.open_unknown--crossover with--dataset/ETHPy150Open django/django/tests/admin_custom_urls/tests.py/AdminCustomUrlsTest.test_post_save_change_redirect