Programming Forums > Script Programming > Python

bulio · Jun 4th, 2006, 10:47 AM

Hey everyone,

I'm currently learning Python, and I have two quick questions.

The first one is, when defining an object inside of a class why do we use (self)?

ie:

(Toggle Plain Text)

 
class Person
    def bulio(self): 
        print "Bulio says hi." #Use self so it will do this?

Is it because self will make the object run what is inside of it? (And therefore use the print?)

Secondly, would it be wise for a Python newbie to start learning pygame right away? I know my basic loops, if statements, functions, and classes.

Thanks!

megamind5005 · Jun 4th, 2006, 10:59 AM

The only way you're gonna find out whether it's wise or not is to actually look at some example code and read/do some starters' tutorials. If you've learnt enough to be asking about objects and definition, I don't think you're far from reaching the point where you'll want to/should learn things like PyGame, PyMedia, BeautifulSoup etc.

Get some source code for the simpler games like Tetris from the PyGame website and look at them. That's how I kinda started

Arevos · Jun 4th, 2006, 11:14 AM

Quote:

Originally Posted by bulio

Is it because self will make the object run what is inside of it? (And therefore use the print?)

I'm not quite sure what you mean here.

In Python, the first argument of a method belonging to a function is a reference to the object the function is contained within. This argument is, by convention, called "self".

Thus:

(Toggle Plain Text)

x = MyClass()
x.foobar()

Is the same as:

(Toggle Plain Text)

x = MyClass()
MyClass.foobar(x)

The "self" argument allows a method to access the object in which it is contained.

e.g.:

(Toggle Plain Text)

class Test:
    def __init__(self):
        self.x = 10
        self.y = 5

t = Test()
print t.x, t.y

Prints out:

(Toggle Plain Text)

10 5

bulio · Jun 4th, 2006, 11:36 AM

Thanks guys, I think I understand it now.

Jun 4th, 2006, 10:47 AM	#1
bulio Hobbyist Programmer Join Date: Jul 2004 Location: Location Posts: 138 Rep Power: 5	Two quick questions Hey everyone, I'm currently learning Python, and I have two quick questions. The first one is, when defining an object inside of a class why do we use (self)? ie: (Toggle Plain Text) class Person def bulio(self): print "Bulio says hi." #Use self so it will do this? class Person def bulio(self): print "Bulio says hi." #Use self so it will do this? Is it because self will make the object run what is inside of it? (And therefore use the print?) Secondly, would it be wise for a Python newbie to start learning pygame right away? I know my basic loops, if statements, functions, and classes. Thanks!

Jun 4th, 2006, 10:59 AM	#2
megamind5005 Programmer Join Date: Dec 2004 Location: UK Posts: 53 Rep Power: 4	The only way you're gonna find out whether it's wise or not is to actually look at some example code and read/do some starters' tutorials. If you've learnt enough to be asking about objects and definition, I don't think you're far from reaching the point where you'll want to/should learn things like PyGame, PyMedia, BeautifulSoup etc. Get some source code for the simpler games like Tetris from the PyGame website and look at them. That's how I kinda started __________________ Tetris is so unrealistic

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Jun 4th, 2006, 11:36 AM	#4
bulio Hobbyist Programmer Join Date: Jul 2004 Location: Location Posts: 138 Rep Power: 5	Thanks guys, I think I understand it now.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Programming Forums > Script Programming > Python

Two quick questions