Python 为什么pip安装会抛出此错误？

您应该首先尝试使用以下命令安装pip：

$ sudo easy_install pip ( on mac high sierra)

Traceback (most recent call last):
  File "/usr/bin/easy_install-2.7", line 11, in <module>
    load_entry_point('setuptools==18.5', 'console_scripts', 'easy_install')()
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 484, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 2707, in load_entry_point
    return ep.load()
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 2325, in load
    return self.resolve()
  File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 2331, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/setuptools/command/easy_install.py", line 46, in <module>
    from setuptools.archive_util import unpack_archive
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/setuptools/archive_util.py", line 15, in <module>
    from pkg_resources import ensure_directory, ContextualZipFile
ImportError: cannot import name ContextualZipFile


$ which python
/usr/bin/python

$ which pip
/usr/local/bin/pip

$ which python3
/usr/local/bin/python3

如果您是为python2安装它：

sudo apt update
sudo apt install python3-pip

然后，您可以使用以下方法验证版本：

sudo apt update
sudo apt install python-pip

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希望这能有所帮助。

在mac上安装了两个版本的python。 首先是Python2.x，它是默认的，Python3.x。 这是一个我以前也经常遇到的问题，所以我建议

pip3 --version

这将显式安装Python3.x的pip

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完成后使用虚拟环境。

您是否尝试过使用pip3，或者使用“sudo apt install python3 pip”安装pip？我也会尝试@andypaling1建议

$sudo apt install python3-pip