Django- ModuleNotFoundError：没有名为“django.urls”的模块

Question

我是 python 和 Django 的新手。我正在学习使用 MDN 文本指南。 这就是我设置计算机的方法-https://developer.mozilla.org/en-US/docs/Learn/Server-side/Django/development_environment#Using_a_virtual_environment

这是我在尝试测试我的开发网络服务器时显示的命令提示符

(my_django_environment2) C:\Users\user\Desktop\django_gopal\mytestsite>py -3 manage.py runserver
Performing system checks...

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x000001FEB45AD8C8>
Traceback (most recent call last):
  File "C:\Python36\lib\site-packages\django-1.9-py3.6.egg\django\utils\autoreload.py", line 226, in wrapper
    fn(*args, **kwargs)
  File "C:\Python36\lib\site-packages\django-1.9-py3.6.egg\django\core\management\commands\runserver.py", line 116, in inner_run
    self.check(display_num_errors=True)
  File "C:\Python36\lib\site-packages\django-1.9-py3.6.egg\django\core\management\base.py", line 426, in check
    include_deployment_checks=include_deployment_checks,
  File "C:\Python36\lib\site-packages\django-1.9-py3.6.egg\django\core\checks\registry.py", line 75, in run_checks
    new_errors = check(app_configs=app_configs)
  File "C:\Python36\lib\site-packages\django-1.9-py3.6.egg\django\core\checks\urls.py", line 10, in check_url_config
    return check_resolver(resolver)
  File "C:\Python36\lib\site-packages\django-1.9-py3.6.egg\django\core\checks\urls.py", line 19, in check_resolver
    for pattern in resolver.url_patterns:
  File "C:\Python36\lib\site-packages\django-1.9-py3.6.egg\django\utils\functional.py", line 33, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Python36\lib\site-packages\django-1.9-py3.6.egg\django\core\urlresolvers.py", line 417, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "C:\Python36\lib\site-packages\django-1.9-py3.6.egg\django\utils\functional.py", line 33, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Python36\lib\site-packages\django-1.9-py3.6.egg\django\core\urlresolvers.py", line 410, in urlconf_module
    return import_module(self.urlconf_name)
  File "C:\Python36\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 "C:\Users\user\Desktop\django_gopal\mytestsite\mytestsite\urls.py", line 17, in <module>
    from django.urls import path
ModuleNotFoundError: No module named 'django.urls'

urls.py

"""mytestsite URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/2.1/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.urls import include, path
    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import path

urlpatterns = [
    path('admin/', admin.site.urls),
]

我最初确实让开发服务器正常工作，但是在遵循 MDN 教程的第二部分（https://developer.mozilla.org/en-US/docs/Learn/Server-side/Django/skeleton_website）并尝试测试我的骨架网站之后，我第一次开始遇到此错误。

此时我有django 1.9，但是在查看了这个问题之后-（ModuleNotFoundError: No module named 'django.urls'），我升级到了django 2.2。环境变量和项目都是在升级后创建的。但是，我仍然继续遇到同样的错误。然后，我再次尝试按照第一部分（MDN 文本指南）构建一个新的测试站点，但这次使用不同的虚拟环境，但再次遇到相同的错误。

感谢任何帮助

Answer 1

看起来py -3 似乎没有使用您的虚拟环境。激活虚拟环境后，只需使用python：

python manage.py runserver