arr = Stack() arr.push(4) print(arr) arr.push(5) print(arr) arr.push(7) print(arr) arr.push(8) print(arr) arr.push(10) print(arr) arr.__len__() print(arr.__len__()) arr.__str__() print(arr.__str__()) print(arr.size()) # arr.pop() # print(arr) # arr.pop() # print(arr) # arr.pop() # print(arr) # arr.pop() # print(arr) # arr.pop() # print(arr) # arr.pop() # print(arr) print(arr.peek())
