降级Python时意外删除了我系统上的pip，现在pip赢了'；安装

我将Python从3.9降级到3.8，但降级后Pip仍在安装到3.9，所以我卸载了Pip。我尝试使用：

python get pip.py

和

pip install--upgrade--force pip

重新安装pip，两者都给出了相同的错误：

ERROR: Exception:
Traceback (most recent call last):
  File "/Users/Dan/Library/Python/3.8/lib/python/site-packages/pip/_internal/cli/base_command.py", line 180, in _main
    status = self.run(options, args)
  File "/Users/Dan/Library/Python/3.8/lib/python/site-packages/pip/_internal/cli/req_command.py", line 204, in wrapper
    return func(self, options, args)
  File "/Users/Dan/Library/Python/3.8/lib/python/site-packages/pip/_internal/commands/install.py", line 449, in run
    self._handle_target_dir(
  File "/Users/Dan/Library/Python/3.8/lib/python/site-packages/pip/_internal/commands/install.py", line 503, in _handle_target_dir
    shutil.rmtree(target_item_dir)
  File "/usr/local/Cellar/python@3.8/3.8.10/Frameworks/Python.framework/Versions/3.8/lib/python3.8/shutil.py", line 718, in rmtree
    _rmtree_safe_fd(fd, path, onerror)
  File "/usr/local/Cellar/python@3.8/3.8.10/Frameworks/Python.framework/Versions/3.8/lib/python3.8/shutil.py", line 675, in _rmtree_safe_fd
    onerror(os.unlink, fullname, sys.exc_info())
  File "/usr/local/Cellar/python@3.8/3.8.10/Frameworks/Python.framework/Versions/3.8/lib/python3.8/shutil.py", line 673, in _rmtree_safe_fd
    os.unlink(entry.name, dir_fd=topfd)
PermissionError: [Errno 13] Permission denied: 'RECORD'

当我在终端中运行

pip

时，我得到：

Traceback (most recent call last):
  File "/usr/local/bin/pip", line 5, in <module>
    from pip._internal.cli.main import main
ModuleNotFoundError: No module named 'pip'

---

你得到的PermissionError让我觉得你没有像sudo那样运行它，特别是因为它试图使用os.unlink。试试sudo，看看它是否有效

简单的回答是：试着建立一个虚拟环境，不要把自己挖得更深。更详细的回答：很难说问题出在自制版还是系统版的Python上，但我知道至少有两个人因为删除了重要的系统实用程序而不得不重新安装操作系统（你可能需要备份一些文件以防万一）。

/usr/local/bin/pip