问ValueError: source code string can't contain null？

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x000002AA59266510>

Traceback (most recent call last):

File "F:\Mfamily\venv\lib\site-packages\django\utils\autoreload.py", line 225, in wrappe

fn(*args, **kwargs)

File "F:\Mfamily\venv\lib\site-packages\django\core\management\commands\runserver.py", line 117, in inner_run

self.check(display_num_errors=True)

File "F:\Mfamily\venv\lib\site-packages\django\core\management\base.py", line 379, in check

include_deployment_checks=include_deployment_checks,

File "F:\Mfamily\venv\lib\site-packages\django\core\management\base.py", line 366, in _run_checks

return checks.run_checks(**kwargs)

File "F:\Mfamily\venv\lib\site-packages\django\core\checks\registry.py", line 71, in run_checks

new_errors = check(app_configs=app_configs)

File "F:\Mfamily\venv\lib\site-packages\django\core\checks\urls.py", line 40, in check_url_namespaces_unique

all_namespaces = _load_all_namespaces(resolver)

File "F:\Mfamily\venv\lib\site-packages\django\core\checks\urls.py", line 57, in _load_all_namespaces

url_patterns = getattr(resolver, 'url_patterns', [])

File "F:\Mfamily\venv\lib\site-packages\django\utils\functional.py", line 37, in __get__

res = instance.__dict__[self.name] = self.func(instance)

File "F:\Mfamily\venv\lib\site-packages\django\urls\resolvers.py", line 533, in url_patterns

patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)

File "F:\Mfamily\venv\lib\site-packages\django\utils\functional.py", line 37, in __get__

res = instance.__dict__[self.name] = self.func(instance)

File "F:\Mfamily\venv\lib\site-packages\django\urls\resolvers.py", line 526, in urlconf_module

return import_module(self.urlconf_name)

File "D:\python\lib\importlib\__init__.py", line 126, in import_module

return _bootstrap._gcd_import(name[level:], package, level)

File "<frozen importlib._bootstrap>", line 994, in _gcd_import

File "<frozen importlib._bootstrap>", line 971, in _find_and_load

File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked

File "<frozen importlib._bootstrap>", line 665, in _load_unlocked

File "<frozen importlib._bootstrap_external>", line 678, in exec_module

File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed

File "F:\Mfamily\Mfamily\urls.py", line 18, in <module>

from family import views

File "F:\Mfamily\family\views.py", line 3, in <module>

from family.models import TUse

ValueError: source code string cannot contain null bytes