Find location of module at import time

[kpeeters]

I have a pybind11 module which sets up docstrings using the m.doc(...) function call on the module, inside PYBIND11_MODULE. I want to read these docstrings from external files, which are located somewhere relative to the location of the pybind11 module. So I need to know where my module is installed at startup time. I tried m.attr("__file__") but that does not work, presumably because the __file__ attribute only gets set after all .def calls have completed.

So in short: is there any way to get the location at which a pybind11 module is installed at the time the .def functions run, so before the module has been completely registered with python?