Interesting. To me pip-tools seems like a better fit for this use case, in terms of letting you specify a requirements.in file that gets compiled to a requireme

Interesting. To me pip-tools seems like a better fit for this use case, in terms of letting you specify a requirements.in file that gets compiled to a requirement.txt file. This allows you to selectively pin dependencies of other packages if you have some use case for doing so. Something related that would be nice though is having pip list -o only output dependencies in the requirements.in file if it exists, or else that are primary dependencies.