Python includes exercises 54

Python 100 Li

Title: Take an integer from a right end of 4~7 bits.

Program Analysis: consider this:
(1) the right to make a four.
(2) set up a low-4 are all 1, the rest are all zero numbers. Available ~ (~ 0 << 4)
(3) both of the above will be the & operator.

Source Code:

#!/usr/bin/python
# -*- coding: UTF-8 -*-

if __name__ == '__main__':
    a = int(raw_input('input a number:\n'))
    b = a >> 4
    c = ~(~0 << 4)
    d = b & c
    print '%o\t%o' %(a,d)

The above example output is:

input a number:
9
11	0

Python 100 Li