def validate_function_code(request, response):
assert struct.unpack('<STR_LIT>', request[<NUM_LIT:7>:<NUM_LIT:8>])[<NUM_LIT:0>] ==struct.unpack('<STR_LIT>', response[<NUM_LIT:7>:<NUM_LIT:8>])[<NUM_LIT:0>]<EOL>
Validate if Function code in request and response equal.