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cba3201ac2
Since these variables refer to the latest version of PyPy, compared to the similarly named `PYPY27` and `PYPY36` variables (ie same name except without the underscore) which refer to the major/minor version only. The similar names caused me to use the wrong one locally whilst working on another PR, which was caught by tests but demonstrates why we should rename them. Closes @W-7935256@. [skip changelog]
Python Buildpack Install Steps
TODO: Add context on Python install steps, such as why symlinking vs copying
Installing Python packages using Pip
Convention: Use python process to invoke Pip
We don't use this convention (yet) but this is an upcoming change being considered.
This is a bigger concern on Windows than it is in Linux environments, but an emerging convention in the Python community is to invoke pip using:
python3 -m pip [options]
Invoking pip this way ensures correct location - python knows where these packages are stored because it put them there (defaults to Python's pathing info).
All normal command line options are available using this method.