Python program not asking for input [duplicate]

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
– Steven Keith, Commented Feb 7, 2014 at 15:41

Tanveer Alam · Accepted Answer · 2014-02-07 06:33:17Z

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.

doptimusprime · Accepted Answer · 2014-02-07 03:57:17Z

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.

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