Top pip issues

Different pip install behavior depending on usage underscore/dot/dash in package name

help wanted bug

`pip install -e` does not treat a conda environment like a proper virtualenv.

needs discussion bug

Behavior change between 8.1.2 and 9.0.1 of pip breaks --extra-index-url in requirements files

finder bug

Reopen of #3903: extras_require isn't honored if a package is already "discovered" without them

bug

pip install --user -e tries to uninstall system-wide version, unlike pip install --user

user scheme bug

Select file to download based on existing hashes when --require-hashes

auto-locked bug

pip freeze generating format that's incorrectly parsed by pip install -r

freeze vcs awaiting PR auto-locked bug

pip install --download throws error when used with setup.py file

download UX- error messages bug