meka karaganna Code eka kohomada wenas karanna one 
Objectives
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.
history āļāˇāļēāļŊāˇ List Define āļāļģāļŊāˇ result ekata append āļāļģāˇ āļąāļ¸āˇ āˇāļģāˇ āļāˇāļēāļŊāˇ āˇāˇāļāļŊāˇ try āļāļģāļŊāˇ āļļāˇāļŊāˇāˇāˇ āˇāļģāˇ āļāˇāļēāˇ āļąāˇāˇāˇ.
Objectives
- Extend the functionali of the the calculator to save and display the past results of the arithmetic operations
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
- Display the complete saved list of operations (in the order of execution) using a new command â?â
- If there are no previous calculations when the history '?' command is used, you can display the following message "No past calculations to show"
Python:
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("8.History : ? ")
# take input from the user
choice = input("Enter choice(+,-,*,/,^,%,#,$,?): ")
print(choice)
if(select_op(choice) == -1):
#program ends here
print("Done. Terminating")
exit()history āļāˇāļēāļŊāˇ List Define āļāļģāļŊāˇ result ekata append āļāļģāˇ āļąāļ¸āˇ āˇāļģāˇ āļāˇāļēāļŊāˇ āˇāˇāļāļŊāˇ try āļāļģāļŊāˇ āļļāˇāļŊāˇāˇāˇ āˇāļģāˇ āļāˇāļēāˇ āļąāˇāˇāˇ.
