python - 当我运行 Flask 时，它显示错误 : ModuleNotFoundError: No module named 'werkzeug.contrib' . 谁能帮我解决这个问题？

Question

我得到的确切错误是:

flask.cli.NoAppException: While importing "application", an ImportError was raised:Traceback      (most recent call last):
File "/home/harshit/.local/lib/python3.6/site-packages/flask/cli.py", line 240, in     locate_app
__import__(module_name)
File "/home/harshit/Documents/project1/application.py", line 18, in <module>
Session(app)
File "/home/harshit/.local/lib/python3.6/site-packages/flask_session/__init__.py", line 54,    in __init__
self.init_app(app)
File "/home/harshit/.local/lib/python3.6/site-packages/flask_session/__init__.py", line 61, in init_app
app.session_interface = self._get_interface(app)
File "/home/harshit/.local/lib/python3.6/site-packages/flask_session/__init__.py", line 93, in _get_interface
config['SESSION_USE_SIGNER'], config['SESSION_PERMANENT'])
File "/home/harshit/.local/lib/python3.6/site-packages/flask_session/sessions.py", line 313, in __init__
from werkzeug.contrib.cache import FileSystemCache
ModuleNotFoundError: No module named 'werkzeug.contrib'

我正在尝试从 Flask 导入 session

Answer 1

Werkzeug 1.0.0 删除了弃用的代码，包括所有 werkzeug.contrib .您应该为新项目使用替代库。 werkzeug.contrib.session被提取到 secure-cookie .

如果您正在使用的现有项目需要来自 contrib 的东西，您需要降级到 Werkzeug<1:

pip3 install Werkzeug<1