Mac默认Python路径更改

Question

Hi I have a Mac and happen to have many different flavors of Python installed everywhere.

right now when I opened up python in terminal, type in

which python

the return result is:

//anaconda/bin/python

I am wondering what should I do to change the default python to a python that I like, so next time when I do:

which python

the path should be:

/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7

Thanks!

Answer 1

When you installed Anaconda it should have added a new item to your PATH variable, right at the front. You should see something like this in your *~/.bash_profile* file:

# added by Anaconda 1.8.0 installer
export PATH="//anaconda/bin:$PATH"

You can remove these lines, reopen any terminal window you have and your default Python should have been restored.

Answer 2

which command uses the directories listed in $PATH to search for the first occurrence of a command. If you want to list all instances of executables, use -a option.

which python2.7

Output:

/usr/bin/python2.7

This will display symbolic link to /System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7

to resolve symbolic link use

readlink $(which python2.7)  

output:

../../System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7

Answer 3

尝试创建符号链接

ln -s /anaconda/bin/python /Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7