#!/usr/bin/env python
# -*- coding: UTF-8 -*-
__author__ = 'Julio Tentor <jtentor@fi.unju.edu.ar>'


import numpy

class Stack(object):
    def __init__(self, capacity = 10):
        self.__capacity = capacity
        self.__datos = numpy.empty(self.__capacity, numpy.object)
        self.__count = 0

    def Push(self, x):
        if self.__count >= self.__capacity :
            raise ValueError("ERROR La pila está llena...")
        self.__datos[self.__count] = x
        self.__count += 1

    def Pop(self):
        if self.Empty :
            raise ValueError("ERROR La pila está vacía...")
        self.__count -= 1
        return self.__datos[self.__count]

    def Peek(self):
        if self.Empty :
            raise ValueError("ERROR La pila está vacía...")
        return self.__datos[self.__count - 1]

    def Top(self):
        return self.Peek()

    @property
    def Empty(self):
        return self.__count == 0

    @property
    def Count(self):
        return self.__count


if __name__ == "__main__":
    pass