How to modify bits in an integer?

Question

I have an integer with a value 7 (0b00000111) And I would like to replace it with a function to 13 (0b00001101). What is

Answer 1

You can use bitwise opertions. http://wiki.python.org/moin/BitwiseOperators

if you want to set a given bit to 1 you can use bitwise 'or' with 1 on given position:

0b00000111 | 0b00001000 = 0b00001111

to set a given bit to 0 you can use bitwise 'and'

0b00001111 & 0b11111011 = 0b00001011

Note that 0b prefix is for binary numbers and 0x is for hexadecimal.