Validating data types

Posted by / 10-Sep-2020 16:08

Validating data types

If the REQUEST_METHOD is POST, then the form has been submitted - and it should be validated.

If it has not been submitted, skip the validation and display a blank form.

When input validation fails, the data is not published to the repository.

I want to make it so that if the value is a string type, it would print "Value must be an integer or decimal - Please enter a valid number", and then loop it back to asking for the user input until the user gives a valid entry. So here is my code so far: keep Program Running = True print ("Welcome to the Calculator Application!

") good = True while keep Program Running: print ("1: Addition") print ("2: Subtraction") print ("3: Multiplication") print ("4: Division") print ("5: Quit Application") choice = input("Please choose what you would like to do: ") if choice == "1": n1 = float(input ("Enter your first number: ")) n2 = float(input ("Enter your second number: ")) print ("Your result is: ", n1 n2) elif choice == "2": n1 = float(input ("Enter your first number: ")) n2 = float(input ("Enter your second number: ")) print ("Your result is: ", n1 - n2) elif choice == "3": n1 = float(input ("Enter your first number: ")) n2 = float(input ("Enter your second number: ")) print ("Your result is: ", n1 * n2) elif choice == "4": n1 = float(input ("Enter your first number: ")) n2 = float(input ("Enter your second number: ")) try: print ("Your result is: ", n1 / n2) except: if n2 == 0: print ("Zero Division Error - Enter Valid Number") while good: n2 = float(input ("Enter your second number: ")) if n2!

Data validation is a checking procedure that a computer carries out automatically to help reduce input errors in data.

A common type of data validation is the spell-checker function, which is used to check for spelling and grammar errors when typing in a word processing document.

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=0: good =False print ("Your result is: ", n1 / n2) elif choice == "5": print ("Thank you for using the calculator. ") keep Program Running = False else: print ("Please choose a valid option.") while True: try: n1 = float(input ("Enter your first number: ")) n2 = float(input ("Enter your second number: ")) except Value Error: print("When I ask for a number, give me a number. ") else: print ("Your result is: ", n1 n2) break def get_two_floats(): while True: try: n1 = float(input ("Enter your first number: ")) n2 = float(input ("Enter your second number: ")) except Value Error: print("When I ask for a number, give me a number. ") else: return n1, n2 def get_float(): while True: try: return float(input ("Enter your second number: ")) except Value Error: print("When I ask for a number, give me a number.

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