stack.py

class Stack:
 def __init__(self):
 self.stack = []

 def push(self, element):
 self.stack.append(element)

 def pop(self):
 del self.stack[self.size()-1]

 def printAll(self):
 print(self.stack)

 def size(self):
 return len(self.stack)

 def empty(self):
 return self.size() == 0


stack_instance = Stack()
stack_instance.push('a')
stack_instance.push('b')
stack_instance.push('c')
stack_instance.pop()
stack_instance.printAll()