<qiyuangong>876_Middle_of_the_Linked_List_2.py
def middleNode( head):
    fast = slow = head
    while fast and fast.next:
        slow = slow.next
        fast = fast.next.next
    return slow
def sample_funcname ( var_0 ) :
    var_2 = var_1 = var_0
    while var_2 and var_2.next :
        var_1 = var_1.next
        var_2 = var_2.next.next
    return var_1
