Add two numbers in x86 assembly in Python

main.py

# -*- coding: utf-8 -*-
import mmap
import ctypes


def run():
    code_stream = mmap.mmap(-1, 4096, mmap.MAP_PRIVATE,
        mmap.PROT_EXEC | mmap.PROT_READ | mmap.PROT_WRITE)
    code_stream.write(b"\x01\xf7")  # add edi, esi
    code_stream.write(b"\x89\xf8")  # mov eax, edi
    code_stream.write(b"\xc3")  # ret

    code_address = ctypes.addressof(ctypes.c_void_p.from_buffer(code_stream))
    function_type = ctypes.CFUNCTYPE(ctypes.c_uint32, ctypes.c_int32, ctypes.c_int32)
    add_numbers = function_type(code_address)
    assert add_numbers(121, 27) == 148


if __name__ == "__main__":
    run()