human
Count total set bits in all numbers from 1 to n | Returns count of set bits present in all numbers from 1 to n.
initialize the result.
A utility function to count set bits in a number x.
Driver program"
How can the above be solved in Python?
assistant
#Here is code to count total set bits in all numbers from 1 to n and the other steps required.
 def countSetBits ( n ) :
	bitCount = 0
	for i in range ( 1 , n + 1 ) :
		bitCount += countSetBitsUtil ( i )
	return bitCount
def countSetBitsUtil ( x ) :
	if ( x <= 0 ) :
		return 0
	return ( 0 if int ( x % 2 ) == 0 else 1 ) + countSetBitsUtil ( int ( x / 2 ) )
if __name__ == ' _ _ main _ _ ' :
	n = 4
	print ( " Total ▁ set ▁ bit ▁ count ▁ is " , countSetBits ( n ) )