Method push

Data Structures/Stack/Python/Stack.py:14–19

(self, data)

        self.__size = 0

    def push(self, data):
        # adds an element at the beginning
        self.__size += 1
        new_node = Node(data)
        new_node.ref = self.__head
        self.__head = new_node

    def pop(self):
        # deletes element from beginning