Why are these files names started with underscore?

[Stefan Behnel]

gmspro, 24.06.2012 10:42:
> I see there are some files here started with underscore(_) , is there any convention of something for it?
> 
> http://hg.python.org/cpython/file/3b7230997425/Modules
> 
> _bisectmodule.c
> [...]
> _winapi.c
> 
> Is there any convention or something?

Yes. Please read the CPython developer guide (click on "core development"
on the Python front page).

Stefan