Get error when I use pyc instead py or ROS

Question

I am using ROS Noetic. I tried to use the pyc file instead py to hide the src file. But, always I got this error:

RuntimeError: Bad magic number in .pyc file

To compile my ROS node, the first step is to generate the file.pyc with

python3.8 -m compileall file.py

And I got a file.pyc with the magic number 550d which corresponds to the version of python 3.8 Now, I changed the line int CMakeLists.txt to:

catkin_install_python(PROGRAMS scripts/file.pyc
   DESTINATION ${CATKIN_PACKAGE_BIN_DESTINATION}
 )

Then, when I run the node I got the same error. I checked the magic number of file.py and /devel/lib/file_package/file.pyc, I found that have 2321 which does not match to any version, even when I added this option:

catkin_make -DPYTHON_EXECUTABLE=/usr/bin/python3.8

Also, the magic number of file.pyc will be changed to 2321 in /devel/lib/file_package/file.pyc after the compilation.

Any, help please?