human
Count maximum possible pairs from an array having sum K | Function to count the maximum number of pairs from given array with sum K.
Sort array in increasing order.
Stores the final result.
Initialize the left and right pointers.
Traverse array until start < end.
Decrement right by 1.
Increment left by 1.
Increment result and left pointer by 1 and decrement right pointer by 1.
Print the result.
Driver Code.
Function Call"
How can the above be solved in Python?

Can you provide a code to count maximum possible pairs from an array having sum K and the other steps required?
assistant
#Here is code to count maximum possible pairs from an array having sum K and the other steps required.
 def maxPairs ( nums , k ) :
	nums = sorted ( nums )
	result = 0
	start , end = 0 , len ( nums ) - 1
	while ( start < end ) :
		if ( nums [ start ] + nums [ end ] > k ) :
			end -= 1
		elif ( nums [ start ] + nums [ end ] < k ) :
			start += 1
		else :
			start += 1
			end -= 1
			result += 1
	print ( result )
if __name__ == ' _ _ main _ _ ' :
	arr = [ 1 , 2 , 3 , 4 ]
	K = 5
	maxPairs ( arr , K )