Python program not asking for input

Question

I am trying to teach myself python by writing a simple program to test if a number is prime or not. It seems to me like the code should work but when I run it I am not getting asked to input a number even though I am using raw_input() like it says to do here, Python: user input and commandline arguments. What should I do to fix this?

class PrimeTester:

    def primeTest(number):
        if number == 2:
            print("prime")

        if number % 2 == 0:
            print("not prime")

        highesttestnum = number ** 0.5 + 1
        count = 3
        while count <= highesttestnum:
            if number % count == 0:
                print("not prime")
            count += 2

        print("prime")

    def __init__(self):
        x = int(raw_input('Input a number to test if prime:'))
        print("The number " + x + " " + primeTest(x))

I'd suggest if you going to use a class here, that you pass the number_to_test as an argument to the constructor. — Steven Keith, Feb 07 '14 at 15:41

score 1 · Answer 1 · answered Feb 07 '14 at 03:57

1

You need to create an object of this class after your code.

 x = PrimeTester()

You can also create the object in function and then call this function.

answered Feb 07 '14 at 03:57

doptimusprime

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score 1 · Accepted Answer · answered Feb 07 '14 at 06:33

class PrimeTester:
    def __init__(self):
        x = int(raw_input('Input a number to test if prime:'))
        result = self.primeTest(x)
        print("The number " + str(x) + " is " + result)


    def primeTest(self, number):
        if number == 2:
            result = "prime"

        if number % 2 == 0:
            result = "not prime"

        highesttestnum = number ** 0.5 + 1
        count = 3
        while count <= highesttestnum:
            if number % count == 0:
                result = "not prime"
            count += 2

            result= "prime"

        return result

if __name__ == '__main__':
    obj = PrimeTester()

When ever you call a method inside another use 'self' which refers to the current object. Please read python doc. http://docs.python.org/2/tutorial/classes.html .

While printing you have to convert your integer value to string for concatenating them.
And try to return something from method instead of printing that is more pythonic.

Python program not asking for input

2 Answers2