>我最近将点数升级到19.3。当我这样做时，我无法使用任何pip命令。操作系统 - 苹果电脑
当我在谷歌上搜索和研究更多时，大多数建议都是降级 pip 包。但是，即使我尝试这样做，我也得到了相同的结果。事实上，强制安装或卸载或 sudo 命令不起作用。
Traceback (most recent call last):
File "/Users/.virtualenvs/myvenv/bin/pip", line 10, in <module>
sys.exit(main())
File "/Users/.virtualenvs/myvenv/lib/python3.7/site-packages/pip/_internal/main.py", line 45, in main
command = create_command(cmd_name, isolated=("--isolated" in cmd_args))
File "/Users/.virtualenvs/myvenv/lib/python3.7/site-packages/pip/_internal/commands/__init__.py", line 96, in create_command
module = importlib.import_module(module_path)
File "/Library/Frameworks/Python.framework/Versions/3.7/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 "/Users/.virtualenvs/myvenv/lib/python3.7/site-packages/pip/_internal/commands/install.py", line 24, in <module>
from pip._internal.cli.req_command import RequirementCommand
File "/Users/.virtualenvs/myvenv/lib/python3.7/site-packages/pip/_internal/cli/req_command.py", line 21, in <module>
from pip._internal.operations.prepare import RequirementPreparer
File "/Users/.virtualenvs/myvenv/lib/python3.7/site-packages/pip/_internal/operations/prepare.py", line 17, in <module>
from pip._internal.download import unpack_url
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 668, in _load_unlocked
File "<frozen importlib._bootstrap>", line 638, in _load_backward_compatible
File "/Users/.virtualenvs/myvenv/lib/python3.7/site-packages/wrapt/importer.py", line 158, in load_module
notify_module_loaded(module)
File "/Users/.virtualenvs/myvenv/lib/python3.7/site-packages/wrapt/decorators.py", line 443, in _synchronized
return wrapped(*args, **kwargs)
File "/Users/.virtualenvs/myvenv/lib/python3.7/site-packages/wrapt/importer.py", line 136, in notify_module_loaded
hook(module)
File "/Users/.virtualenvs/myvenv/lib/python3.7/site-packages/pip_system_certs/wrapt_pip.py", line 8, in apply_patches
override_ssl_handler(download)
File "/Users/.virtualenvs/myvenv/lib/python3.7/site-packages/pip_system_certs/wrapt_pip.py", line 17, in override_ssl_handler
class SslContextHttpAdapter(download.HTTPAdapter):
AttributeError: module 'pip._internal.download' has no attribute 'HTTPAdapter'
有人可以帮忙吗？
这似乎是因为您安装了pip-system-certs包，该包以从未支持的方式挂接到pip内部。一旦您更新pip并且pip-system-certs想要弄乱的东西被更改，这就会立即中断。
你至少需要摆脱pip-system-certs.看起来它被安装在虚拟环境中，所以你可能只是停用环境并制作一个新的......但如果是这样，您似乎已经尝试过了。如果您还没有尝试过，请务必下次尝试！如果你已经尝试过了，那么你可能破坏的东西比我们可以看到的要多，你可能需要更严厉的措施，比如完整的Python重新安装。
对我有用的是去<your conda environment>Libsite-packages并删除所有出现的pip-system-certs。就我而言，它是一个文件和两个文件夹。
pip-tools~=4.2.0与pip>=19.3兼容