`poetry show $DEPENDENCY` should also list the user defined dependencies that cause the inclusion of this `$DEPENDENCY`

[nicolassanmar]

• I have searched the issues of this repo and believe that this is not a duplicate.
• I have searched the FAQ and general documentation and believe that my question is not already covered.

Feature Request

Running poetry show with a particular dependency only shows the parent dependencies that require it, instead of showing the dependencies defined by the user in the pyproject.toml that introduced it.

For example, I would like to know why my package depends on aiohttp. Running poetry show aiohttp shows that datasets and ffspec require it, but I did not directly add those dependencies to my project, and they don't tell me too much about why aiohttp is in my project:

It would be very useful if it actually returned the packages that I explicitly included (flair, transformers, and a few more).

I created this workaround where I parse the result of poetry show --tree in order to get this information:
https://gist.github.com/nicolassanmar/ed7f2a0dcccb5fab21364d86ec960444

poetry show aiohttp --why --tree does not show top-level dependencies either

None of the options for the poetry show command actually acomplish what I want to do.

datasets is not defined in my top-level packages (neither is ffspec):

Related context:
This is the PR that added the option to poetry show on a dependency #2351

[dimbleby]

--why already does this

please close

[nicolassanmar]

🤦‍♂️I did not know about this, and I'm not sure how I missed the option when I checked the docs.
Thanks for the quick response!

[nicolassanmar]

@dimbleby Sorry to come back with this after a few days, but I just recently had time to give it a try.
From the documentation, I did think this would do what I wanted it to do (list top level packages that included aiohttp in my project).

Unfortunately, there is no combination of options I can pass to poetry show that actually lists them:

This still lists datasets and ffspec instead of the actual flair or transformers that I included in the pyproject.toml.

For this reason, I'm reopening this issue, as there is no feature to do this

[dimbleby]

well, poetry tree --show --why is clearly where this belongs.

I expect that a merge request making it do what you want would be welcome (I also expect that if you are hoping for someone else to do it: they probably won't)