Configure julia options

[dpinol]

Hi,
with pyjulia it's possible to configure some julia options (see https://github.com/JuliaPy/pyjulia/blob/master/src/julia/options.py#L79)
Is it possible with PythonCall?
If not, I'm willing to create a PR if somebody could give me any hint on how to integrate it

related to #73

[cjdoris]

No, those options are not currently supported, but a PR to implement some would be welcome.

I guess you'd need to do something like this: https://github.com/JuliaPy/pyjulia/blob/56a739126d3fed0d24e548069ff216fea78fbe1b/src/julia/libjulia.py#L330

It would go just above here: https://github.com/cjdoris/PythonCall.jl/blob/6c07d4e4eadb8706b15c5a6fcde9efe116982c3f/pysrc/juliacall/__init__.py#L80

Were there particular options you had in mind?

I think for now use environment variables to set the options, such as PYTHON_JULIACALL_COMPILE=min. There isn't any other config mechanism in JuliaCall right now.

[cjdoris]

I have just pushed a change which parses some options into the CONFIG dict here: https://github.com/cjdoris/PythonCall.jl/blob/bb411e7015b9c22b3eba6417927630b3d96a1ff5/pysrc/juliacall/__init__.py#L89-L97

This allows you to set options either as environment variables as above or via the -X argument to python, such as python -X juliacall_compile=min.

A PR which uses these to actually set the options in Julia would be great.

[dpinol]

Cool, I'm working on it. Cheers!