Python Practice Example 54
Python 100 ExamplesProblem:Take the 4th to 7th bits from the right end of an integer a.
Program analysis:You can consider it this way:
(1) First shift a right by 4 bits.
(2) Set a number whose lower 4 bits are all 1 and the rest are all 0. You can use ~(~0<<4)
(3) Perform the & operation on the above two.
Example
#!/usr/bin/python
# -*- coding: UTF-8 -*-
if __name__ == '__main__':
a = int(input('input a number:\n'))
b = a >> 4
c = ~(~0 << 4)
d = b & c
print ('%o\t%o' %(a,d))
The output result of the above example is:
input a number: 9 11 0Other extensions