Embedding Python calls in a multi-threaded Pybind11 extension module

[iSwapna]

I have a Pybind11 extension module with spawns multiple C++ threads. If the extension module is the Python thread A and a spawned C++ thread B, is there a way to import Pure Python modules in thread B?

It works when the same Python thread A calls imports and calls back into Python.
When the thread is B (C++), even though I have released the gil in thread A and acquired it in thread B, the import call silently fails.