[Python] Small Python program applying Skeleton

This is an example of how to apply skeleton in the previous post.
This program is just the simplest calculator in the world. The purpose is just to prove how efficient to apply the skeleton into your project. It makes the project have a good look and well-organized.

--------------------
Chương trình máy tính python đơn giản. Cách áp dụng coding style ở bài trước
--------------------

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85

""" -------------------------------------------------- mathhoang (mathhoang.blogspot.com) -------------------------------------------------- Even this small segment of code does not cover all of the cases, it's still good for beginner to start learning Python There are still some cases not been covered in this small program, you still have room to impove it. This is left for you as exercises. Improvements needed:+ adding more operation + check the case when users input some special keys such as: Enter, space,.... + optimize the code to make it shorter and more readable + modify to make it have a friendly interaction with user + improve code structure + etc..... """ import sys # print the calculation result def print_result(op1,op2,result,operator): print("{0} {2} {1} = {3}".format(op1,op2,operator,result)) # display the guildine def print_guide(): print("1: addition") print("2: subtraction") print("3: multiplication") print("4: division") print("5: power") print("6: guidline") print("7: exit program") # display the message in case users input the invalid key def print_no_operation(): print("You have entered incorrect operator"); print("Please press 6 for help") # main control flow def main(): print_guide() while(1): print("---------------------------------------") operator = int(input("Enter operation: ")) if(int(operator) >= 1 and int(operator) <= 5): """ get the input """ op1 = int(input("Enter the 1st operand: ")) op2 = int(input("Enter the 2nd operand: ")) """Just to make the interpreter happy""" result = "undefined" str_op = "undefined" if(operator == 1): result = op1 + op2 str_op = '+' #addition elif(operator == 2): result = op1 - op2 str_op = '-' #subtraction elif(operator == 3): result = op1 * op2 str_op = '*' #multiplication elif(operator == 4): result = op1/op2 str_op = '/' #division elif(operator == 5): result = op1**op2 str_op = '^' #exponent """Pint out the result""" print_result(op1,op2,result,str_op) elif(operator == 6): print_guide() #Print out the guidline elif(operator == 7): print("you are about existing the program! Thanks for giving a try!!") break; #Exit program else: print_no_operation(); #invalid operation # call the main function if __name__ == '__main__': sys.exit(main())