generate type hints for python >= 3.5 about pythonocc-generator

[lalvarezt]

@jf--- Hi, I've been working on something similar. Check the code here https://github.com/lalvarezt/pythonocc-generator/commit/6e7fede28114c466ba5428242cb15ebefd02570d.

This generates the additional .pyi files that you referred to. It's not complete yet, I need to manage the overload cases, for now it only adds the first occurrence of an overload function. I checked gp and graphic3d module and it looks OK. I'm generating all the modules now. If you have the time check to see if the generated code is OK, I've tested it with PyCharm and it works for the selected modules.

Edit: I've updated the link with the latest changes

[jf---]

oh my @lalvarezt , that's super exciting 🚀

what about the more explicit way as how mypy handles type hinting for python 2?

perhaps having inlined type hints is preferable to .pyi files, since its valuable documentation / avoids having yet another file opened in your editor...

[lalvarezt]

@jf--- I've tried that already, the problem I found is that on the .i files you can only affect the GetObject and GetHandle functions, since they are explicitly on the code. Another thing is that swig generates the typing information using the c/c++ type and then writes it on the python generated file. So from what I saw the procedure is the following
-Edit .i
-Compile
-Edit .py to correct the type

Its much easier to generate the .pyi files, and copy them. Actually you would never have to open the .pyi because the only information on them is the type.