handling of .pyc files

[Joe Lewis]

If I use PyInstaller to create an executable from python code that contains a binary (e.g. a .pyc file in a wheel package) how does the binary become a part of the exe that is created? For example in scipy.spatial  there is a python extension file named  qhull.cp38-winamd64.pyc. When I try to run the .exe created by PyInstaller,  attempting to execute the code:

from .qhull import *        

Will give error message "Importer:  DLL load failed. module qhull cannot be found".   The qhull module is the binary qhull.cp38-winamd64.pyc.