To open and Read .pyd Files

Is there any way to open and read the source code from .pyd files.
How can I decompile it or can convert it in .py file?

A .pyd file is a Windows DLL file that contains python code and DLL entry points to run it. While it’s theoretically possible to grab the bytecode out of that and decompile it, I know of no tool out there that has this ability. I’m pretty sure decompyle (the only decent python decompiler) is not able to handle .pyd files. Just to make things worse, .pyd files are typically created by Cython, which is fully compiled, and don’t contain python bytecode at all.

Without some serious wizardry on your part, I’d say you’re out of luck.