Gunicorn ImportError：无法从 docker 中的“eventlet.wsgi”导入名称“ALREADY_HANDLED”

我有一个工作代码在 docker 中运行着带有gunicorn（eventlet工作人员）的flask。它也在生产中工作，但在我的机器上，它开始这样做。我在谷歌上找不到任何关于这件事的信息。可能是什么问题？

Error: class uri 'eventlet' invalid or not found:
web_1       |
web_1       | [Traceback (most recent call last):
web_1       |   File "/root/.local/lib/python3.7/site-packages/gunicorn/util.py", line 99, in load_class
web_1       |     mod = importlib.import_module('.'.join(components))
web_1       |   File "/usr/local/lib/python3.7/importlib/__init__.py", line 127, in import_module
web_1       |     return _bootstrap._gcd_import(name[level:], package, level)
web_1       |   File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
web_1       |   File "<frozen importlib._bootstrap>", line 983, in _find_and_load
web_1       |   File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
web_1       |   File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
web_1       |   File "<frozen importlib._bootstrap_external>", line 728, in exec_module
web_1       |   File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
web_1       |   File "/root/.local/lib/python3.7/site-packages/gunicorn/workers/geventlet.py", line 20, in <module>
web_1       |     from eventlet.wsgi import ALREADY_HANDLED as EVENTLET_ALREADY_HANDLED
web_1       | ImportError: cannot import name 'ALREADY_HANDLED' from 'eventlet.wsgi' (/root/.local/lib/python3.7/site-packages/eventlet/wsgi.py)
web_1       | ]

安装旧版本的 eventlet 解决了问题：pip install eventlet==0.30.2

EDIT:

您可以像这样使用较新的版本：pip install eventlet==0.33.0 https://github.com/benoitc/gunicorn/archive/refs/heads/master.zip#egg=gunicorn==20.1.0

see: https://github.com/benoitc/gunicorn/pull/2581#issuecomment-994198667 https://github.com/benoitc/gunicorn/pull/2581#issuecomment-994198667

谢谢@jmunsch