Per discussion on mailing list, I suggest adding a PYTHONLOGGING environment variable, and a matching -L cmdline argument.

When set to a logging level of choice, they will initiate basicConfig with the appropriate level.

For example, "py.exe -L info" will be equivalent to "logging.basicConfig(level='info')" on interpreter startup.

Sames as setting env var "PYTHONLOGGING=info".

This matches the current behavior of other settings, such as PYTHONWARNINGS and -W, allows to easily test programs without modifying them, and further completes the expected arguments available from the commandline.

Discussion on mailing list for reference:
https://mail.python.org/archives/list/python-ideas@python.org/thread/I74LVJWJLE2LUCCZGOF5A5JDSDHJ6WX2/