about the .pyd file

hello everyone,

I am new to python so I need help about the .pyd file
I have a name.pyd file which basically is a merge of many .h5 data files.
I have to use this .pyd files(merge of simulations files) and compare it with one experiment data file which is also a .h5
So, my question are
what exactly is .pyd files?is it an executable file?
how i can use it for my purpose?

can someone help?
thanx in advance

re: about the .pyd file

The extension .pyd is used for Python extension modules. To use the code defined in an extension module, use the import statement just like you would any other Python module.