pkg_resources merrily adds site-packages to the front of sys.path
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- Python
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Description
Originally reported by: ncoghlan (Bitbucket: ncoghlan, GitHub: ncoghlan)
If a requirement in __main__.__requires__ is met by a package in site-packages, pkg_resources will happily reinsert site-packages at the front of sys.path.
This breaks the world when working on software where a previous version is installed as a system package.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by tracing pkg_resources handling of main.requires and the code that modifies sys.path when a requirement is found in site-packages. Done means a satisfied requirement no longer moves site-packages ahead of the existing path in the reported scenario, with coverage for that behavior.
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Assessment
- Tech stack
- python
- Domain
- build-system
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100