Python is a scripting language. It is hard to protect python code from being copied. No 100% protection is required but at least slow down those who have bad intentions. Is it possible to minify/uglify python code the way javascript front-end code is being done today?
EDIT: The python code will be used in Raspberry Pi, not server. On raspberry pi, anyone can take out the SDcard and gain access to the python code.
python -m compileall .
$ cython helloworld.py -o helloworld.c
$ gcc -shared -pthread -fPIC -fwrapv -O2 -Wall -fno-strict-aliasing -I/usr/include/python3.7 -o helloworld.so helloworld.c
YMMV using this approach; I've run into various gotchas using different modules.