This project is representes calculator. It contains: Addition, Subtraction, Multiplication, Division.

a=("+:Addition",
   "-:Subtraction",
   "*:Multiplication",
   "/:Division",
   "**:Exponential")
print(a)
def calculate(a,b,choice):
   if choice == '+':
      result = a+b
   elif choice == '-':
      result = a-b
   elif choice == '*':
      result = a*b
   elif choice == '/':
      result = a/b
   elif choice == '^':
      result = a**b

   return result
continue_calculating = True
while continue_calculating is True:
     num1 = float(input('Enter a first number:'))
     choice = input('Enter an operator(+,-,*,/,**):')
     num2 = float(input('Enter a second number:'))
     print(num1,choice,num2)
     result=calculate(num1,num2,choice)
     print('=',result)
     yes_or_no = input('continue?(y/n):')
     if yes_or_no == 'n':
         continue_calculating = False