[Tutor] int to bytes and the other way around

[Timo]

I have written a program that uses a C++ module as backend. Now I found 
out that I can use Python to call an underneath C lib. That's nice, so I 
don't need to Popen() the C++ module.

I have a problem though with some info that is returned (always an integer).
I'll try to explain a bit, this is what I found out so far.
There are 4 options in the program. The first 3 options go up to 18 and 
the fourth to 7.
If all options are set to 0, the returned int is 0.
If the first option is set from 1 to 18, this is what I get returned.
However, for option 2, I get 256, 512, 768, 1024, etc.
For option 3 I get 65536, 131072, 196608, etc, etc.
And for option 4: 16777216, 33554432, etc.

Ok, that's nice so far. But if option 1 is set to 4 and option 2 is set 
to 8 and option 3 is set to 10 (for example), I get this returned: 657412

The C++ module counts the bytes. First byte = option1, second byte = 
option2 etc.
        u8 *options = (u8 *)&result[1];
        option1 = options[0]
        option2 = options[1]
        option3 = options[2]
        option4 = options[3]

How will I approach this in Python?