解决mac中pip3对应python2（pip指向问题）

解决mac中pip3对应python2（pip指向问题）

同理可以解决pip对应Python3的问题。

一、问题

在mac中查看pip和pip3的版本，其中pip3对应的Python版本是2.7

正常情况下应该是：pip对应Python2，pip3对应Python3。

二、解决

使用which可以查看指令pip的绝对路径。

~ » which pip
/usr/local/bin/pip


在mac中使用easy_install安装pip会导致pip和pip3都变成pip

~ » sudo easy_install pip littlechieh6@bogon
Password:
Searching for pip
Best match: pip 20.2b1
Processing pip-20.2b1-py2.7.egg
pip 20.2b1 is already the active version in easy-install.pth
Installing pip script to /usr/local/bin
Installing pip3.8 script to /usr/local/bin
Installing pip3 script to /usr/local/binUsing /Library/Python/2.7/site-packages/pip-20.2b1-py2.7.egg
Processing dependencies for pip
Finished processing dependencies for pip
-------------------------------------------------------------
~ » pip3 --version littlechieh6@bogon
pip 20.2b1 from /Library/Python/2.7/site-packages/pip-20.2b1-py2.7.egg/pip (python 2.7)
-------------------------------------------------------------
~ » pip --version littlechieh6@bogon
pip 20.2b1 from /Library/Python/2.7/site-packages/pip-20.2b1-py2.7.egg/pip (python 2.7)


或者使用bootstrap.pypa.io网站的get-pip.py脚本安装pip3，会导致pip和pip3都变成pip3

~/Desktop » curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py% Total % Received % Xferd Average Speed Time Time Time CurrentDload Upload Total Spent Left Speed0 0 0 0 0 0 0 0 --:--:-- --:--: 1 1842k 1 20565 0 0 43294 0 0:00:43 --:--: 50 1842k 50 935k 0 0 626k 0 0:00:02 0:00:100 1842k 100 1842k 0 0 848k 0 0:00:02 0:00:02 --:--:-- 848k
-------------------------------------------------------------
~/Desktop » sudo python3 get-pip.py
-------------------------------------------------------------
~/Desktop » pip --version littlechieh6@bogon
pip 20.3.3 from /Library/Python/3.8/site-packages/pip (python 3.8)
-------------------------------------------------------------
~/Desktop » pip3 --version littlechieh6@bogon
pip 20.3.3 from /Library/Python/3.8/site-packages/pip (python 3.8)


查看Python2和Python3的执行位置

~ » which python3 littlechieh6@bogon
/usr/bin/python3
-------------------------------------------------------------
~ » which python littlechieh6@bogon
/usr/bin/python
-------------------------------------------------------------
~ » ls -al /usr/bin/python3 littlechieh6@bogon
-rwxr-xr-x 1 root wheel 31488 Sep 22 08:29 /usr/bin/python3
-------------------------------------------------------------
~ » ls -al /usr/bin/python littlechieh6@bogon
lrwxr-xr-x 1 root wheel 75 Jul 1 08:44 /usr/bin/python -> ../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7


查看pip的执行位置

~ » which pip littlechieh6@bogon
/usr/local/bin/pip
-------------------------------------------------------------
~ » which pip3 littlechieh6@bogon
/usr/local/bin/pip3
-------------------------------------------------------------
~ » ls -al /usr/local/bin/pip littlechieh6@bogon
-rwxr-xr-x 1 root admin 263 Dec 21 22:56 /usr/local/bin/pip
-------------------------------------------------------------
~ » ls -al /usr/local/bin/pip3 littlechieh6@bogon
-rwxr-xr-x 1 root admin 263 Dec 21 22:56 /usr/local/bin/pip3


原pip和pip3脚本，关键点在于#!代表执行脚本的路径。由于pip和pip3都是由python3执行，所以使用pip -V和pip3 -V

#!/Applications/Xcode.app/Contents/Developer/usr/bin/python3
# -*- coding: utf-8 -*-
import re
import sys
from pip._internal.cli.main import main
if __name__ == &＃39;__main__&＃39;:sys.argv[0] = re.sub(r&＃39;(-script\.pyw|\.exe)?$&＃39;, &＃39;&＃39;, sys.argv[0])sys.exit(main())


使用vim /usr/local/bin/pip将解释器指向Python2

#!/System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7
# -*- coding: utf-8 -*-
import re
import sys
from pip._internal.cli.main import main
if __name__ == &＃39;__main__&＃39;:sys.argv[0] = re.sub(r&＃39;(-script\.pyw|\.exe)?$&＃39;, &＃39;&＃39;, sys.argv[0])sys.exit(main())


三、效果

~ » pip -V littlechieh6@bogon
pip 20.2b1 from /Library/Python/2.7/site-packages/pip-20.2b1-py2.7.egg/pip (python 2.7)
-------------------------------------------------------------
~ » pip3 -V littlechieh6@bogon
pip 20.3.3 from /Library/Python/3.8/site-packages/pip (python 3.8)


参考教程：

1. https://blog.csdn.net/u014259820/article/details/100580970