Django utils dateparse.py + tests_dateparse.py ¶ See also https://github.com/django/django/blob/master/django/utils/dateparse.py https://github.com/django/django/blob/master/tests/utils_tests/test_dateparse.py django.utils.dateparse.py django.utils.dateparse.py django.utils.dateparse.parse_duration django.utils.dateparse.parse_datetime tests/utils_tests/test_dateparse.py tests/utils_tests/test_dateparse.py class DurationParseTests(unittest.TestCase)