sequences ways to achieve the computation complexities outlined in this table either list or linked list will suffice the code in sect is an implementation of stack with list the implementation is pretty straight-forward the main program in sect tests the stack datatype with couple tests to make sure the code operates correctly the stack class code class stackdef __init__(self)self items [ def pop(self)if self isempty()raise runtimeerror("attempt to pop an empty stack" topidx len(self items)- item self items[topidxdel self items[topidxreturn item def push(self,item)self items append(item def top(self)if self isempty()raise runtimeerror("attempt to get top of empty stack" topidx len(self items)- return self items[topidx def isempty(self)return len(self items= def main() stack(lst list(range( )lst [ for in lsts push( if top(= print("test passed"elseprint("test failed" while not isempty()lst append( pop() lst reverse( if lst !lstprint("test failed"elseprint("test passed" this copy belongs to 'acha