For the below code I need to add a history list with below conditions, Objectives Extend the functionali of the the calculator to save and display the past results of the arithmetic operations Stage 2: Save and display calculation history of the calculator In this second stage of the assignment you will extend the given calculator program to record the calculations, and recall them as a list using an additional command '?'. Task 1: Study the given code in the answer box and extend it to save each executed operation in a Python List. Declare a list to store the previous operations Save the operator, operands and the results as a single string, for each operation after each calculation Task 2: implement a history() function to handle the operation '?' Display the complete saved list of operations (in the order of execution) using a new command ‘?’ If there are no previous calculations when the history '?' command is used, you can display the following message "No past calculations to show" Code: def add(a,b): return a+b def subtract(a,b): return a-b def multiply (a,b): return a*b def divide(a,b): try: return a/b except Exception as e: print(e) def power(a,b): return a**b def remainder(a,b): return a%b def select_op(choice): if (choice == '#'): return -1 elif (choice == '$'): return 0 elif (choice in ('+','-','*','/','^','%')): while (True): num1s = str(input("Enter first number: ")) print(num1s) if num1s.endswith('$'): return 0 if num1s.endswith('#'): return -1 try: num1 = float(num1s) break except: print("Not a valid number,please enter again") continue while (True): num2s = str(input("Enter second number: ")) print(num2s) if num2s.endswith('$'): return 0 if num2s.endswith('#'): return -1 try: num2 = float(num2s) break except: print("Not a valid number,please enter again") continue result = 0.0 last_calculation = "" if choice == '+': result = add(num1, num2) elif choice == '-': result = subtract(num1, num2) elif choice == '*': result = multiply(num1, num2) elif choice == '/': result = divide(num1, num2) elif choice == '^': result = power(num1, num2) elif choice == '%': result = remainder(num1, num2) else: print("Something Went Wrong") last_calculation = "{0} {1} {2} = {3}".format(num1, choice, num2, result) print(last_calculation ) else: print("Unrecognized operation") while True: print("Select operation.") print("1.Add : + ") print("2.Subtract : - ") print("3.Multiply : * ") print("4.Divide : / ") print("5.Power : ^ ") print("6.Remainder: % ") print("7.Terminate: # ") print("8.Reset : $ ") print("9.History : ? ") # take input from the user choice = input("Enter choice(+,-,*,/,^,%,#,$,?): ") print(choice) if(select_op(choice) == -1): #program ends here print("Done. Terminating") exit()

For the below code I need to add a history list with below conditions,

Objectives

• Extend the functionali of the the calculator to save and display the past results of the arithmetic operations

Stage 2: Save and display calculation history of the calculator

Code:

def add(a,b):
  return a+b
  
def subtract(a,b):
  return a-b
  
def multiply (a,b):
  return a*b

def divide(a,b):
  try:
    return a/b
  except Exception as e:
    print(e)
def power(a,b):
  return a**b
  
def remainder(a,b):
  return a%b
  
def select_op(choice):
  if (choice == '#'):
    return -1
  elif (choice == '$'):
    return 0
  elif (choice in ('+','-','*','/','^','%')):
    while (True):
      num1s = str(input("Enter first number: "))
      print(num1s)
      if num1s.endswith('$'):
        return 0
      if num1s.endswith('#'):
        return -1
        
      try:
        num1 = float(num1s)
        break
      except:
        print("Not a valid number,please enter again")
        continue
    
    while (True):
      num2s = str(input("Enter second number: "))
      print(num2s)
      if num2s.endswith('$'):
        return 0
      if num2s.endswith('#'):
        return -1
      try:  
        num2 = float(num2s)
        break
      except:
        print("Not a valid number,please enter again")
        continue
    
    result = 0.0
    last_calculation = ""
    if choice == '+':
      result = add(num1, num2)
    elif choice == '-':
      result = subtract(num1, num2)
    elif choice == '*':
      result = multiply(num1, num2)
    elif choice == '/':
      result =  divide(num1, num2)
    elif choice == '^':
      result = power(num1, num2)
    elif choice == '%':
      result = remainder(num1, num2)
    else:
      print("Something Went Wrong")
      
    last_calculation =  "{0} {1} {2} = {3}".format(num1, choice, num2, result) 
    print(last_calculation )
    
  else:
    print("Unrecognized operation")
    
while True:
  print("Select operation.")
  print("1.Add      : + ")
  print("2.Subtract : - ")
  print("3.Multiply : * ")
  print("4.Divide   : / ")
  print("5.Power    : ^ ")
  print("6.Remainder: % ")
  print("7.Terminate: # ")
  print("8.Reset    : $ ")
  print("9.History  : ? ")
  
  # take input from the user
  choice = input("Enter choice(+,-,*,/,^,%,#,$,?): ")
  print(choice)
  if(select_op(choice) == -1):
    #program ends here
    print("Done. Terminating")
    exit()