how to build .pyd files

CYBER मावळा


I am building a plugin for nvda using scons. i  am working with pyaudio in it 
my folder structure is as follows:
globalPlugins  # is the main script 
        modules  # is a folder, where i am putting all my depencies
 i m not able to import pyaudio, error is
C:\Users\sharangk\AppData\Roaming\nvda\addons\demo\globalPlugins\modules\pyaudio\", line 116, in <module>
    import _portaudio as pa
ModuleNotFoundError: No module named '_portaudio'

I have attached and sconstruct files as an attachment.
I am trying to solve this problem since 15 days, still not getting solution 

please help me.