Understanding Python bitwise, arithmetic, and boolean operators

Question

I\'m new to Python and not able to understand this. Can someone help break down the statement for me?

Both n and parity are integers

n += parity != n &a         


        

Answer 1

Lets break this down:

(n += (parity != (n & 1)))

(n & 1) this is bitmask, and takes the value of the smallest (least significant bit) of n.

parity != this is true if parity is different from the result of (n & 1)

n += this increments n by whatever value the rest of the line returns.

n    parity    output(increment of n)
0      1         1
1      1         0
1      0         1
0      0         0

From the above table you can see that it functions like an XOR of n's LSB and parity.

Notes: Usually parity is the oddness(1) or evenness(0) of a data packet.

Hope this helps! Enjoy.