Django 2.1 and Python 3.7: KeyError: 'django' when running Apache2 mod_wsgi and other issues
Django 2.1 and Python 3.7: KeyError: 'django' when running Apache2 mod_wsgi and other issues
经过这么多小时试图弄清楚为什么我的 django 设置不再工作，我来找你。我向上帝发誓，无论你想要什么，我昨晚都没有睡。
我想从 Python 3.5 切换到 Python 3.7，因为我开始使用 f-strings，并且此功能可从 Python 3.6，我想为什么不直接使用 Python 3.7。另外，我希望我的 2 个域（mywebsite.fr 和 mywebsite.com）指向同一个 Django 项目。直到现在只有 mywebsite.fr 没问题。
我将尽可能准确地向您解释我是如何获得下面这个可怕的代码的：
- 我的安装是 Ubuntu 16.04，
- 我在 Ubuntu 设置中原生安装的 Python 版本有些乱七八糟。终于安装成功了（我觉得）Python 3.7,
- 我真的很纠结configuring/making/installing合适mod_wsgi,
- 我将 venv 用于我的 django 设置（在下面称为 m2gvenvprod），
- 我正在使用 mod_wgsi 及其相关的守护进程模式，
- 根据我阅读的所有内容，我确信我在 apache2 中的每一个 website/domains 的配置都是正确的（在可用站点中），
- 我在这里，使用下面的 apache2 error.log，在尝试了我在互联网上找到的关于我的问题的所有内容的任意组合之后。我无法理解该日志。我不明白为什么 django 不是有效密钥。我现在什么都不知道……真的很绝望。
我注意到一件事可能很有趣：如果我转到 mywebsite.com：错误 500。但是如果我转到我的网站。com/admin，我将被重定向到我的网站。com/admin/ login/?next=/admin/: 所以，一定还有什么东西在工作，嗯？
Traceback (most recent call last):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 66, in __getitem__
return self._engines[alias]
KeyError: 'django'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 121, in get_package_libraries
module = import_module(entry[1])
File "/usr/local/lib/python3.7/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django_libs/templatetags/libs_tags.py", line 6, in <module>
from django.template.base import TOKEN_BLOCK, TOKEN_VAR
ImportError: cannot import name 'TOKEN_BLOCK' from 'django.template.base' (/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/base.py)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
response = get_response(request)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/base.py", line 156, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/base.py", line 154, in _get_response
response = response.render()
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/response.py", line 106, in render
self.content = self.rendered_content
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/response.py", line 81, in rendered_content
template = self.resolve_template(self.template_name)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/response.py", line 63, in resolve_template
return select_template(template, using=self.using)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/loader.py", line 38, in select_template
engines = _engine_list(using)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/loader.py", line 66, in _engine_list
return engines.all() if using is None else [engines[using]]
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 90, in all
return [self[alias] for alias in self]
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 90, in <listcomp>
return [self[alias] for alias in self]
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 81, in __getitem__
engine = engine_cls(params)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 25, in __init__
options['libraries'] = self.get_templatetag_libraries(libraries)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 43, in get_templatetag_libraries
libraries = get_installed_libraries()
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 108, in get_installed_libraries
for name in get_package_libraries(pkg):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 125, in get_package_libraries
"trying to load '%s': %s" % (entry[1], e)
django.template.library.InvalidTemplateLibrary: Invalid template library specified. ImportError raised when trying to load 'django_libs.templatetags.libs_tags': cannot import name 'TOKEN_BLOCK' from 'django.template.base' (/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/base.py)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 66, in __getitem__
return self._engines[alias]
KeyError: 'django'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 121, in get_package_libraries
module = import_module(entry[1])
File "/usr/local/lib/python3.7/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django_libs/templatetags/libs_tags.py", line 6, in <module>
from django.template.base import TOKEN_BLOCK, TOKEN_VAR
ImportError: cannot import name 'TOKEN_BLOCK' from 'django.template.base' (/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/base.py)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
response = get_response(request)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/utils/deprecation.py", line 91, in __call__
response = response or self.get_response(request)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
response = response_for_exception(request, exc)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/exception.py", line 90, in response_for_exception
response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/exception.py", line 129, in handle_uncaught_exception
return callback(request, **param_dict)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/utils/decorators.py", line 142, in _wrapped_view
response = view_func(request, *args, **kwargs)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/views/defaults.py", line 69, in server_error
template = loader.get_template(template_name)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/loader.py", line 12, in get_template
engines = _engine_list(using)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/loader.py", line 66, in _engine_list
return engines.all() if using is None else [engines[using]]
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 90, in all
return [self[alias] for alias in self]
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 90, in <listcomp>
return [self[alias] for alias in self]
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 81, in __getitem__
engine = engine_cls(params)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 25, in __init__
options['libraries'] = self.get_templatetag_libraries(libraries)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 43, in get_templatetag_libraries
libraries = get_installed_libraries()
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 108, in get_installed_libraries
for name in get_package_libraries(pkg):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 125, in get_package_libraries
"trying to load '%s': %s" % (entry[1], e)
django.template.library.InvalidTemplateLibrary: Invalid template library specified. ImportError raised when trying to load 'django_libs.templatetags.libs_tags': cannot import name 'TOKEN_BLOCK' from 'django.template.base' (/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/base.py)
提前感谢您给我的建议！
编辑 1
现在它根本不起作用。我试图让它像以前一样在 Python 3.5 上运行，但没有成功。
好吧，我从没想过 Django (2.1) 的正式发布会是问题所在，但我们来了！在 python 3.7 下创建我的新虚拟环境时，我没有立即关注新版本的 django。即使在之后，我也认为这是一个稳定的版本，仅此而已。所以也许我的 Ubuntu 安装有问题（但我真的看不出是什么），但是从 django 2.1 降级到 django 2.0 就解决了我的问题！即使我在这上面花了太多时间也很高兴。请注意，它与 Python 3.7 一起工作得很好（就像我最初的愿望一样）。
感谢阅读！
我在使用 apache 和 python 3.7.0.
时也遇到了问题
幸运的是，django 2.1.4 与 python 3.6.6.
结合使用时可以正常工作
经过这么多小时试图弄清楚为什么我的 django 设置不再工作，我来找你。我向上帝发誓，无论你想要什么，我昨晚都没有睡。
我想从 Python 3.5 切换到 Python 3.7，因为我开始使用 f-strings，并且此功能可从 Python 3.6，我想为什么不直接使用 Python 3.7。另外，我希望我的 2 个域（mywebsite.fr 和 mywebsite.com）指向同一个 Django 项目。直到现在只有 mywebsite.fr 没问题。
我将尽可能准确地向您解释我是如何获得下面这个可怕的代码的：
- 我的安装是 Ubuntu 16.04，
- 我在 Ubuntu 设置中原生安装的 Python 版本有些乱七八糟。终于安装成功了（我觉得）Python 3.7,
- 我真的很纠结configuring/making/installing合适mod_wsgi,
- 我将 venv 用于我的 django 设置（在下面称为 m2gvenvprod），
- 我正在使用 mod_wgsi 及其相关的守护进程模式，
- 根据我阅读的所有内容，我确信我在 apache2 中的每一个 website/domains 的配置都是正确的（在可用站点中），
- 我在这里，使用下面的 apache2 error.log，在尝试了我在互联网上找到的关于我的问题的所有内容的任意组合之后。我无法理解该日志。我不明白为什么 django 不是有效密钥。我现在什么都不知道……真的很绝望。
我注意到一件事可能很有趣：如果我转到 mywebsite.com：错误 500。但是如果我转到我的网站。com/admin，我将被重定向到我的网站。com/admin/ login/?next=/admin/: 所以，一定还有什么东西在工作，嗯？
Traceback (most recent call last):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 66, in __getitem__
return self._engines[alias]
KeyError: 'django'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 121, in get_package_libraries
module = import_module(entry[1])
File "/usr/local/lib/python3.7/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django_libs/templatetags/libs_tags.py", line 6, in <module>
from django.template.base import TOKEN_BLOCK, TOKEN_VAR
ImportError: cannot import name 'TOKEN_BLOCK' from 'django.template.base' (/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/base.py)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
response = get_response(request)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/base.py", line 156, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/base.py", line 154, in _get_response
response = response.render()
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/response.py", line 106, in render
self.content = self.rendered_content
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/response.py", line 81, in rendered_content
template = self.resolve_template(self.template_name)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/response.py", line 63, in resolve_template
return select_template(template, using=self.using)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/loader.py", line 38, in select_template
engines = _engine_list(using)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/loader.py", line 66, in _engine_list
return engines.all() if using is None else [engines[using]]
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 90, in all
return [self[alias] for alias in self]
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 90, in <listcomp>
return [self[alias] for alias in self]
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 81, in __getitem__
engine = engine_cls(params)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 25, in __init__
options['libraries'] = self.get_templatetag_libraries(libraries)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 43, in get_templatetag_libraries
libraries = get_installed_libraries()
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 108, in get_installed_libraries
for name in get_package_libraries(pkg):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 125, in get_package_libraries
"trying to load '%s': %s" % (entry[1], e)
django.template.library.InvalidTemplateLibrary: Invalid template library specified. ImportError raised when trying to load 'django_libs.templatetags.libs_tags': cannot import name 'TOKEN_BLOCK' from 'django.template.base' (/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/base.py)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 66, in __getitem__
return self._engines[alias]
KeyError: 'django'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 121, in get_package_libraries
module = import_module(entry[1])
File "/usr/local/lib/python3.7/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django_libs/templatetags/libs_tags.py", line 6, in <module>
from django.template.base import TOKEN_BLOCK, TOKEN_VAR
ImportError: cannot import name 'TOKEN_BLOCK' from 'django.template.base' (/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/base.py)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
response = get_response(request)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/utils/deprecation.py", line 91, in __call__
response = response or self.get_response(request)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/exception.py", line 36, in inner
response = response_for_exception(request, exc)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/exception.py", line 90, in response_for_exception
response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/core/handlers/exception.py", line 129, in handle_uncaught_exception
return callback(request, **param_dict)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/utils/decorators.py", line 142, in _wrapped_view
response = view_func(request, *args, **kwargs)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/views/defaults.py", line 69, in server_error
template = loader.get_template(template_name)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/loader.py", line 12, in get_template
engines = _engine_list(using)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/loader.py", line 66, in _engine_list
return engines.all() if using is None else [engines[using]]
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 90, in all
return [self[alias] for alias in self]
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 90, in <listcomp>
return [self[alias] for alias in self]
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/utils.py", line 81, in __getitem__
engine = engine_cls(params)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 25, in __init__
options['libraries'] = self.get_templatetag_libraries(libraries)
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 43, in get_templatetag_libraries
libraries = get_installed_libraries()
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 108, in get_installed_libraries
for name in get_package_libraries(pkg):
File "/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/backends/django.py", line 125, in get_package_libraries
"trying to load '%s': %s" % (entry[1], e)
django.template.library.InvalidTemplateLibrary: Invalid template library specified. ImportError raised when trying to load 'django_libs.templatetags.libs_tags': cannot import name 'TOKEN_BLOCK' from 'django.template.base' (/home/krazymax/django/M2Gproject/m2gvenvprod/lib/python3.7/site-packages/django/template/base.py)
提前感谢您给我的建议！
编辑 1
现在它根本不起作用。我试图让它像以前一样在 Python 3.5 上运行，但没有成功。
好吧，我从没想过 Django (2.1) 的正式发布会是问题所在，但我们来了！在 python 3.7 下创建我的新虚拟环境时，我没有立即关注新版本的 django。即使在之后，我也认为这是一个稳定的版本，仅此而已。所以也许我的 Ubuntu 安装有问题（但我真的看不出是什么），但是从 django 2.1 降级到 django 2.0 就解决了我的问题！即使我在这上面花了太多时间也很高兴。请注意，它与 Python 3.7 一起工作得很好（就像我最初的愿望一样）。
感谢阅读！
我在使用 apache 和 python 3.7.0.
幸运的是，django 2.1.4 与 python 3.6.6.