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@@ -42,3 +42,99 @@
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No specific release it yet targeted to remove the `python3-nose` package.
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Users and packagers of dependent packages are encouraged to switch to `python3-pytest` or `python3-nose2`.
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+
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+ == Notes on migrating user-installed pip packages
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+
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+ When you upgrade from Fedora 30 or 31 to Fedora 32, the main Python interpreter version changes from 3.7 to 3.8.
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+ If you have any Python packages installed using `pip`, you must complete the following procedure to migrate them to the new version:
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+
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+ . Install the previously main Python version:
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+ +
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+ [source,bash]
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+ ----
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+ sudo dnf install python3.7
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+ ----
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+
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+ . Get `pip` for the previously main Python version:
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+ +
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+ [source,bash]
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+ ----
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+ python3.7 -m ensurepip --user
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+ ----
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+
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+ . Observe the installed packages:
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+ +
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+ [source,bash]
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+ ----
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+ python3.7 -m pip list
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+ ----
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+
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+ . Save the list with specific versions:
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+ +
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+ [source,bash]
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+ ----
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+ python3.7 -m pip freeze > installed.txt
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+ ----
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+
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+ . Install the same packages for the now default version:
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+ +
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+ [source,bash]
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+ ----
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+ python3 -m pip install --user -r installed.txt
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+ ----
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+
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+ . Uninstall user-installed packages for 3.7; this ensures proper removal of files in `~/.local/bin`:
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+ +
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+ [source,bash]
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+ ----
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+ python3.7 -m pip uninstall $(python3.7 -m pip list --user | cut -d" " -f1)
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+ ----
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+
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+ . Optionally, clean up the now empty directory structure:
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+ +
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+ [source,bash]
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+ ----
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+ rm -rf ~/.local/lib/python3.7/
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+ ----
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+
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+ . Optionally, remove the unneeded Python version:
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+ +
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+ [source,bash]
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+ ----
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+ sudo dnf remove python3.7
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+ ----
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+
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+ Additionally, if you have any `pip` packages installed using `sudo`, run the following commands _before running the final step above which removes `python3.7`_, or install it again temporarily:
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+
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+ . Get `pip` for the previously main Python version for `root`:
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+ +
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+ [source,bash]
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+ ----
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+ sudo python3.7 -m ensurepip
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+ ----
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+
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+ . Observe the system-installed packages:
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+ +
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+ [source,bash]
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+ ----
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+ sudo python3.7 -m pip list
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+ ----
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+
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+ . Uninstall installed packages for 3.7; this ensures proper removal of files in `/usr/local/bin`:
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+ +
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+ [source,bash]
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+ ----
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+ sudo python3.7 -m pip uninstall $(python3.7 -m pip list | cut -d" " -f1)
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+ ----
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+
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+ . Optionally, clean up now empty directory structure:
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+ +
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+ [source,bash]
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+ ----
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+ sudo rm -rf /usr/local/lib*/python3.7/
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+ ----
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+
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+ [IMPORTANT]
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+ ====
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+ If you followed the first procedure, the packages are already installed for your user account, which is the preferred option. Avoid using `sudo pip` in the future; these instructions are only intended to recover users who already used `sudo pip` in the past.
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+ ====
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Fixes #503