stack.py

class Stack():
    def __init__(self):   
        self.items = []    ## Empty list intilize

    def push(self,item):
        self.items.append(item)  ## simple appending to list

    def pop(self):
        return self.items.pop()  ## Removing top element of the stack

    def is_empty(self):
        return self.items==[]  ### Checking whether the stack is empty or not

    def peek(self):
        if not self.is_empty():
            return self.items[-1]  ## returnign top element using [-1]=last element
 
    def show_stack(self):
        return self.items   ## Printing all the items
 
obj = Stack()  ## Creating obj for class stack

num = int(input("enter the number of commands"))   ## Taking number of commands     push 10
for i in range(num):        ## Running the loop till the length of commands
    command = input().split(" ")  ## Spliting the command with space 
    if command[0]=='push':  ## IF index 0 is push then call push method
        obj.push(int(command[1]))
        print(obj.show_stack())
    elif command[0]=='pop':
        obj.pop()
        print(obj.show_stack())
    elif command[0]=='peek':
        print(obj.peek())
    elif command[0]=='show':
        print(obj.show_stack())