liste-liee.py

class Node:
    def __init__(self, data = None, next = None):
        self.data = data
        self.next = next

class LinkedList:
    def __init__(self):
        self.head = None

    def listprint(self):
        printval = self.head
        while printval is not None:
            print(printval.dataval)
            printval = printval.nextval
    
    def push(self, n):
        if self.head is None:
            self.head = Node(n)
        else:
            node = self.head
            while node.next is not None:
                node = node.next
            node.next = Node(n)

    def detectLoop(self):
        s = set() 
        temp = self.head 
        while (temp):
            if (temp in s): 
                return True
            s.add(temp) 
            temp = temp.next
        return False