如何删除链表中的节点？

class ListNode:
    def __init__(self, val=0, next=None):
        self.val = val
        self.next = next

def deleteNode(head, val):
    # 判断头节点是否为要删除的节点
    if head.val == val:
        return head.next
    
    # 遍历链表，找到要删除节点的前一个节点
    prev = head
    curr = head.next
    while curr:
        if curr.val == val:
            prev.next = curr.next
            curr.next = None
            break
        prev = curr
        curr = curr.next
    
    return head