Is a “compiled” python program (i.e. *.pyc file created by CPython) a derivative product of CPython? In other words, does one need to comply the Python license in all the programs he or she writes?
Disclaimer: I know that the answers here do not qualify as legal consultation.
No, from a licensing standpoint “derivative” applies to a modified version of the Python interpreter or its standard libraries, not to programs you write that run on the interpreter. It doesn’t matter whether your programs are expressed as plain text or as compiled bytecode.