[issue34247] PYTHONOPTIMZE ignored in 3.7.0 when using custom launcher

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

On my PR, Nick Coghlan wrote:

"We may want to tweak the porting note in What's New, as I believe this may read more environment variables at init time than the interpreter did previously, so embedding applications that want more complete control may now need to set Py_IgnoreEnvironmentFlag when they could previously get by without it."

https://github.com/python/cpython/pull/8659#pullrequestreview-143397378

I'm not sure about this, since it's really a bug of Python 3.7.0 and it's now fixed.

I let you decide if the issue should be closed or not, I leave it open.

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