Support embeddable Python

[abergmeier-dsfishlabs]

Description of the problem / feature request / question:

Starting with Python 3.5, on Windows there is an embeddable Python variant, which is as isolated as possible. It does not however allow modifying by environment variables (e.g. PYTHONPATH). There are alternating control files for that variant, which are currently not supported.

Environment info

• Operating System: Windows

[abergmeier-dsfishlabs]

@meteorcloudy Not sure who other than you (for Windows) is invested in Python.

[abergmeier-dsfishlabs]

See this discussion about how to communicate with Python embeddable: https://bugs.python.org/issue29503

[abergmeier-dsfishlabs]

So the way to replace PYTHONPATH for embeddable would probably be to use:

args = [python_program, "-c", """\
import importlib
import sys
path=%s.rsplit(os.sep, 1)
sys.path.append(path[0])
sys.path.extend(python_path_list)
importlib.import_module(path[1])
""" % main_filename] + args

Would you guys consider taking patches for that?

[abergmeier]

I think it would perhaps also be a good idea to set -e when calling Python.

[abergmeier-dsfishlabs]

Closing since I will close account.