Swap Nodes in Pairs (Leetcode 24)

Problem Link: https://leetcode.com/problems/swap-nodes-in-pairs/

class Solution:
    def swapPairs(self, head: Optional[ListNode]) -> Optional[ListNode]:
        if(head is None):
            return None
        if(head.next is None):
            return head
        temphead=self.swapPairs(head.next.next)
        newhead=head.next
        head.next.next=head
        head.next=temphead
        
        return newhead