Implementing Stack with Python

Question

I am trying to implement a simple stack with Python using arrays. I was wondering if someone could let me know what\'s wrong with my code.

class myStack:
            


        

Answer 1

class Stack:
   s =[]

   def push(self, num):
       self.s.append(num)

   def pop(self):
       if len(self.s) == 0: # erro if you pop an empty list
           return -1
       self.s.remove(self.s[-1])

   def isEmpty(self):
       if len(self.s) == 0:
           return True
       else:
           return False

   def display(self): # this is to display how a stack actually looks like
       if self.isEmpty():
           print("Stack is Empty")
    
       for i in range(len(self.s)-1,-1,-1): # I haven't used reversed() since it will be obv
           print(self.s[i])


obj = Stack()
obj.push(3)
print(obj.isEmpty())
obj.push(4)
obj.display()
print("----")
obj.pop()
obj.display()