def sPush(self, item):
return self.items.append(item)
def sPop(self):
return self.items.pop()
def sPeek(self):
return self.items[len(self.items) - 1]
def sSize(self):
return len(self.items)
s1 = Stack()
p1 = s1.sIsEmpty()
print p1
s1.sPush(3)
s1.sPush(4)
s1.sPush(-1)
s1.sPush(0)
s1.sPush(4)
s1.sPush(1)
s1.sPush(5)
print s1.items
s1.sPop()
print s1.items
print(s1.sPeek())
print(s1.sSize())
