Easiest way to turn kth bit from right to zero in python 3

I have to change kth bit from right to 0. If it is already 0 I do not have to change anything.

For n = 37 and k = 3, the output should be 33.

37 = 100101 ~> 100001 = 33

For n = 37 and k = 4, the output should be 37. Since the bit is already 0.

I have seen a couple of answers on SO but, I was not able to figure out.

How to modify bits in an integer?

how to change 1 to 0 and 0 to 1 in binary(Python)

Python – Flipping Binary 1's and 0's in a String

>Solution :

use <<(shift left), & (bitwise and operator) and ~ (bitwise not operator) to achieve this

import sys

def changeBit(val,bit):
    flip = 1<<(bit-1)
    val = ~(flip) & val
    return val

print(changeBit(37,3))