"""
### Task 1 (A):
Using a Python create a Class named "**Stack**". 
The class should contain push and pop methods. The item to be stored 
in the stack should be and object of the the class "**Node**" for which
the class is given below:

class Node:
    def __init__ (self, _id, _value):
        self._id = _id
        self._value = _value
    
    def get_id(self):
        return self._id

    def get_value(self):
        return self._value
    
    def set_id(self, _id):
        self._id = _id

    def set_value(self, _value):
        self._value = _value
"""