Mac默認安裝python2.7.
但是沒有pip2
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開始安裝：
sudo curl https://bootstrap.pypa.io/pip/2.7/get-pip.py -o get-pip.py
python2 get-pip.py
➜ site-packages python2 get-pip.py DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support pip 21.0 will remove support for this functionality. Defaulting to user installation because normal site-packages is not writeable Collecting pip<21.0 Downloading pip-20.3.4-py2.py3-none-any.whl (1.5 MB) |████████████████████████████████| 1.5 MB 167 kB/s Installing collected packages: pip WARNING: The scripts pip, pip2 and pip2.7 are installed in '/Users/dzq/Library/Python/2.7/bin' which is not on PATH. Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location. Successfully installed pip-20.3.4
從輸出日志可以看到幾個信息：
python2.7 已經過時了。
安裝了pip-20.3.4.
安裝路徑： /Users/dzq/Library/Python/2.7/bin
但是不在PATH環境
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為了讓pip命令生效，現在要做的事情
sudo cp ~/Library/Python/2.7/bin/pip /usr/local/bin/pip
在任意路徑下執行 pip -V
➜ ~ pip -V pip 20.3.4 from ~/Library/Python/2.7/lib/python/site-packages/pip (python 2.7)
pip2 至此安裝成功