I'm trying to create a code object (Python 3.11) with modified co_code to another function, but I notice that the CodeType constructor seems to modify the inputted co_code. For example: import types import random def f(a): a = a + 1 return a codeobj = f.__code__ new_co_code = bytes([random.randint(0, 255) for _ in range(24)]) new_code = types.CodeType( codeobj.co_argcount, codeobj.co_posonlyargcount, codeobj.co_kwonlyargcount, codeobj.co_nlocals, codeobj.co_stacksize, codeobj.co_flags, new_co_code, codeobj.co_consts, codeobj.co_names, codeobj.co_varnames, codeobj.co_filename, codeobj.co_name, codeobj.co_qualname, codeobj.co_firstlineno, codeobj.co_lnotab, codeobj.co_exceptiontable, ) print(new_co_code) print(new_code.co_code) # this assertion will generally fail assert new_co_code == new_code.co_code """ example output: b'\xe6\x8f\xdb\xc8\xb8\xb86\xe6&a\x18\xfb\x11&\xbc\xce\xc0A\xedjg\x8a\xa4G' b'\x00\x8f\x00\xc8\x00\xb86\xe6\x8ca\xab\xfb\x00\x00\x00\x00\x00\x00\x00\x00g\x8a\xa4G' """ I would assume the newly created code objects co_code would be the same as the parameter I input, but there seems to be some modification done before hand. The resulting code object if you call it will segfault anyways so I dont understand why any modification is needed. Why does it modify it, and where can I see more documentation about it, the only documentation I see about CodeType is that its just defined as f.__code__ in types.py. Continue reading...
