python - 导入错误 : cannot import name 'gen' from 'tornado' (unknown location)

Question

我正在尝试在我的 Mac 中重新安装 pip。但是，我仍然遇到以下错误。我试图通过删除 pip 来修复它，但即使我尝试重新安装它，同样的问题也会不断发生。

  python3 get-pip.py 

Traceback (most recent call last):
  File "get-pip.py", line 24298, in <module>
    main()
  File "get-pip.py", line 139, in main
    bootstrap(tmpdir=tmpdir)
  File "get-pip.py", line 115, in bootstrap
    monkeypatch_for_cert(tmpdir)
  File "get-pip.py", line 96, in monkeypatch_for_cert
    from pip._internal.commands.install import InstallCommand
  File "/var/folders/l1/1bh_mwmx7f18zxjcj0fpysm00000gn/T/tmpeubjpxiw/pip.zip/pip/_internal/commands/__init__.py", line 9, in <module>
  File "/var/folders/l1/1bh_mwmx7f18zxjcj0fpysm00000gn/T/tmpeubjpxiw/pip.zip/pip/_internal/cli/base_command.py", line 12, in <module>
  File "/var/folders/l1/1bh_mwmx7f18zxjcj0fpysm00000gn/T/tmpeubjpxiw/pip.zip/pip/_internal/cli/cmdoptions.py", line 23, in <module>
  File "/var/folders/l1/1bh_mwmx7f18zxjcj0fpysm00000gn/T/tmpeubjpxiw/pip.zip/pip/_internal/cli/parser.py", line 12, in <module>
  File "/var/folders/l1/1bh_mwmx7f18zxjcj0fpysm00000gn/T/tmpeubjpxiw/pip.zip/pip/_internal/configuration.py", line 27, in <module>
  File "/var/folders/l1/1bh_mwmx7f18zxjcj0fpysm00000gn/T/tmpeubjpxiw/pip.zip/pip/_internal/utils/misc.py", line 38, in <module>
  File "/var/folders/l1/1bh_mwmx7f18zxjcj0fpysm00000gn/T/tmpeubjpxiw/pip.zip/pip/_vendor/tenacity/__init__.py", line 523, in <module>
  File "/var/folders/l1/1bh_mwmx7f18zxjcj0fpysm00000gn/T/tmpeubjpxiw/pip.zip/pip/_vendor/tenacity/tornadoweb.py", line 23, in <module>
ImportError: cannot import name 'gen' from 'tornado' (unknown location)

也许任何人都有关于如何解决这个问题的解决方案。

Answer 1

我遇到了同样的问题，所以我卸载了 Python 并重新安装。但是，pip 的问题继续。
所以，我想出了一个额外的解决方案:

卸载 Python

转到安装了 python 的文件夹。您将看到文件保留在文件夹中；删除该文件夹中的所有文件。

重装 Python

检查您的环境变量是否已设置