nearest power of 2 of a number python

# Python3 program to find highest  
# power of 2 smaller than or  
# equal to n. 
def highestPowerof2(n): 
    res = 0; 
    for i in range(n, 0, -1):  
        # If i is a power of 2 
        if ((i & (i - 1)) == 0): 
            res = i; 
            break; 
    return res; 
# Driver code 
n = 10; 
print(highestPowerof2(n)); 
# This code is contributed by mits