Pip install to custom target directory and exclude specific dependencies

Question

I\'m looking for a method to use pip or similiar to install a list of python packages to a custom target directory (ex./mypath/python/pkgs/ ), but also exclude/blacklist

Answer 1

I think this essentially can be achieved in several steps, assuming you're using virtualenv or similar...

• If you first do a normal pip freeze > requirements.txt you'll get all of the transitive dependencies (e.g. not excluding anything.)

• Now edit requirements.txt, remove the packages you want to exclude...

• Finally, in a new environment do pip install -r requirements.txt -t ... --no-deps. Voila: you've installed the dependencies you wanted while excluding specific ones.

Answer 2

An approach that takes into account sub-dependencies is to first install the exclude.txt environment, then the req.txt environment, then check the diff and finally install that into the target directory.

Example using virtualenv that will work on GNU/Linux:

virtualenv tmpenv
source tmpenv/bin/activate

pip install -r exclude.txt
pip freeze > exclude-with-deps.txt
pip install -r req.txt
pip freeze > req-with-deps.txt
comm -13 exclude-with-deps.txt req-with-deps.txt > final-req.txt

pip install -r final-req.txt --no-deps -t pypkgs

Answer 3

Faced with a similar problem, and using a running bash shell I managed to exclude specific packages with

pip install $(grep -ivE "pkg1|pkg2|pkg3" requirements.txt)

where pkg1 and so on are the names of the packages to exclude.