stack.py

class Stack():
 def __init__(self):
 self.items = []
 
 def is_empty(self):
 return self.items == []
 
 def push(self, item):
 self.items.append(item)
 
 def pop(self):
 return self.items.pop()
 
 def get_stack(self):
 return self.items
 
s = Stack()
print(s.is_empty())
s.push("A")
s.push("B")
print(s.get_stack())
s.pop()
print(s.get_stack())
print(s.is_empty())