I have done the following in the past: 1. pip install libfoo==1.x.x 2. pip install libfoo==2.x.x --target ~/libs/libfoo_v2 # vendor libfoo v2 3. import sys

I have done the following in the past: 1. pip install libfoo==1.x.x 2. pip install libfoo==2.x.x --target ~/libs/libfoo_v2 # vendor libfoo v2 3. import sys import libfoo original_sys_path = sys.path.copy() sys.path.insert(0, '~/libs/libfoo_v2') import libfoo as libfoo_v2 sys.path = original_sys_path There are caveats of course. But works for simple cases.