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Stack.py
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Stack.py
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#!/usr/bin/python3
# -*- coding: utf-8 -*-
#
# © 2017 Syrian Programmer.
#
# Stack LIFO: Last In, First Out
#
# Coded in Date: 31/3/2017.
#
class Stack:
""" Python implementation the stack """
def __init__(self, items=None):
if items is None:
items = []
self.__items = items
def push(self, item):
self.__items.append(item)
def pop(self):
return self.__items.pop()
def peek(self):
return self.__items[-1]
def clear(self):
self.__items.clear()
def is_empty(self):
return self.__items == []
def get_items(self):
return self.__items
def size(self):
return len(self.__items)
def __len__(self):
return len(self.__items)
def __getitem__(self, item):
return self.__items[item]
# Sample inputs
if __name__ == '__main__':
x = [10, 20, 30, 40, 50, 60]
q = Stack(x)
q.push(70)
q.push(80)
print(q.get_items())
print(q.pop())
print(q.pop())
print(q.get_items())
print(len(q))
print(q.size())
print(q.is_empty())
print(q.get_items())
q.clear()
print(q.get_items())
q.push(70)
q.push(80)
print(q.get_items())
print(q.pop())
print(q.peek())
print(q.get_items())