Hi all, I have a question on dependency management. In my repo there is a common requirements.txt at the root folder, and separate requirements.txt files under subfolders of each project. The common requirements.txt contains dependencies that are discoverable to all projects, whereas requirements.txt at the subfolders contain dependencies that may have conflicting versions. I have read (https://www.pantsbuild.org/docs/python-third-party-dependencies) on how to manage multiple requirements files, but it seems the only way to have conflicting versions of dependencies is to write "python_requirement_library()" for each of them. This makes the build script complex. Is there any better way to do this? What is the best practice in this case? Thanks!!

Hello!

but it seems the only way to have conflicting versions of dependencies is to write "python_requirement_library()" for each of them.

That wouldn't quite help. FYI, that

python_requirements()

macro is doing nothing more than reading your requirements.txt and creating

python_requirement_library()

for each entry Instead, what that warning is saying is that dependency inference won't work for those conflicting versions. You will need to explicitly add the requirement you want to the

dependencies

field wherever that requirement is used, e.g. add

dependencies=["3rdparty/python:Django"]

to the relevant

python_library

or

python_tests

target

You are right. It seems the only way is to write "python_requirement_library( name="old_requests", requirements=["requests==2.8.0"], )" for each of the conflicting requirements

Not quite - you should be able to have

requests>=3

in

project1/requirements.txt

and then

requests==2.8.0

in

project2/requirements.txt

. You could alternatively define those in BUILD files with

python_requirement_library

, but you can use

requirements.txt

instead Then, whenever you have

import requests

, you need to decide if you should add

project1:requests

or

project2:requests

to the

dependencies

field Does that make sense?

Ah - that is what I look for. Thanks!