Menu
Let's assume that I set PYTHONPATH in .bashrc as below:
export PYTHONPATH=$PYTHONPATH:/ver2packages
And when I check my python path in Python 3:
$ python3
>>> import sys
>>> print(sys.path)
['', '/home/user', '/ver2packages', '/usr/lib/python3.4', '/usr/lib/python3.4/plat-x86_64-linux-gnu', '/usr/lib/python3.4/lib-dynload', '/usr/local/lib/python3.4/dist-packages', '/usr/lib/python3/dist-packages']
In ver2packages, if there are packages having the same name with packages for version 3, there might be conflicts and errors.
Is there a way to set pythonpath for each version of Python?
243
Background. Setting the PYTHONPATH environment variable is an easy way to make Python modules available for import from any directory. This environment variable can list one or more directory paths which contain your own modules. On Windows, multiple paths are separated by semicolons.
If you want to use a different version, you can do so by inserting a special line at the top of your file, called a hashbang. You can also use a hashbang to run your script in a virtualenv that you've defined by pointing it at the python executable in the virtualenv.
PYTHONPATH is an environment variable which you can set to add additional directories where python will look for modules and packages. For most installations, you should not set these variables since they are not needed for Python to run. Python knows where to find its standard library.
For Linux, you can create a symbolic link to you library folder and place it in your aimed version:
ln -s /your/path /usr/local/lib/python3.6/site-packages
This is not about changing PYTHONPATH but an alternative solution.
84
You can set different sys.path for Python 2 and Python 3 using path configuration (.pth) files.
For instance, to add a directory to sys.path for Python 2, create a .pth file in any of Python 2 site-packages directories (i.e. returned by site.getsitepackages() or site.getusersitepackages()):
Python 2.7.11 (default, Dec 6 2015, 15:43:46)
[GCC 5.2.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import site
>>> site.getsitepackages()
['/usr/lib/python2.7/site-packages', '/usr/lib/site-python']
Then create a .pth file (as root):
echo "/ver2packages" > /usr/lib/python2.7/site-packages/ver2packages.pth
See site module documentation for more.
22
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
