[issue33499] Environment variable to set alternate location for pycache tree

[Carl Meyer]

Carl Meyer <carl at oddbird.net> added the comment:

Can we have a named -X option that also takes a parameter? I don't see any existing examples of that. This option needs to take the path where bytecode should be written.

Are there strong use-cases for having a CLI arg for this? I don't mind doing the implementation work if there are, but right now I'm struggling to think of any case where it would be better to run `python -C /tmp/bytecode` than `PYTHONBYTECODEPATH=/tmp/bytecode python`. Our existing "takes a path" env variables (`PYTHONHOME` and `PYTHONPATH`) do not have CLI equivalents.

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<https://bugs.python.org/issue33499>
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