human
Can you provide a code to find the index of the left pointer after possible moves in the array and the other steps required given the following:
Find the index of the left pointer after possible moves in the array | Function that returns the index of the left pointer.
there 's only one element  in the array.
initially both are at end.
Driver code"
How can the above be solved in Python?
assistant
#Here is code to find the index of the left pointer after possible moves in the array and the other steps required.
 def getIndex ( a , n ) :
	if ( n == 1 ) :
		return 0
	ptrL = 0
	ptrR = n - 1
	sumL = a [ 0 ]
	sumR = a [ n - 1 ]
	while ( ptrR - ptrL > 1 ) :
		if ( sumL < sumR ) :
			ptrL += 1
			sumL += a [ ptrL ]
		elif ( sumL > sumR ) :
			ptrR -= 1
			sumR += a [ ptrR ]
		else :
			break
	return ptrL
if __name__ == " _ _ main _ _ " :
	a = [ 2 , 7 , 9 , 8 , 7 ]
	n = len ( a )
	print ( getIndex ( a , n ) )