Type open . bash_profile. In the text file that pops up, add this line at the end: export PYTHONPATH=$PYTHONPATH:foo/bar. Save the file, restart the Terminal, and you’re done.

How do I permanently set Pythonpath?

Setting PYTHONPATH more permanently

1. Open Terminal.app ;
2. Open the file ~/.bash_profile in your text editor – e.g. atom ~/.bash_profile ;
3. Add the following line to the end: export PYTHONPATH=”/Users/my_user/code”
4. Save the file.
5. Close Terminal.app ;
6. Start Terminal.app again, to read in the new settings, and type this:

How do I permanently set my PATH in Linux?

To make the change permanent, enter the command PATH=$PATH:/opt/bin into your home directory’s . bashrc file. When you do this, you’re creating a new PATH variable by appending a directory to the current PATH variable, $PATH .