Add PyCall extension

[codecov[bot]]

Codecov Report

Merging #502 (931449c) into master (75b1925) will increase coverage by 2.92%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #502      +/-   ##
==========================================
+ Coverage   53.37%   56.29%   +2.92%     
==========================================
  Files          50       51       +1     
  Lines        3798     3803       +5     
==========================================
+ Hits         2027     2141     +114     
+ Misses       1771     1662     -109     

Files	Coverage Δ
ext/PyCallExt.jl	100.00% <100.00%> (ø)

... and 24 files with indirect coverage changes

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[LilithHafner]

I'm not sure how to make sense of the test failures. The last merged PR had 55/72 successes, this has 54/71. Tests pass locally for me.

[ChrisRackauckas]

It's not you it's me 😅

We just did the v2 release yesterday, and this is package used by hundreds of other packages so the breaking update will take awhile to propagate through all of the downstream packages and pass.

[LilithHafner]

What's the status here? Is there anything I should do to help?

[ChrisRackauckas]

The tests are failing because it doesn't find pyjulia to be installed. Try moving the conda pip stuff to before the pycall is loaded? Somehow it needs to install that package on the Julia side to test it

[LilithHafner]

Ah, lovely! And I can use this CI failure as a guide, thanks!

[LilithHafner]

Here's a quote from the last CI failure: "Defaulting to user installation because normal site-packages is not writeable"

[LilithHafner]

Python tests pass! 🎉

[ChrisRackauckas]

Awesome, thanks for pushing through it!