object creation

[BiraRai]

for record in roll:
x = box()
x.createSomethi ng(record)
do something ....


Can anyone tell me why python keeps return the original object x that
was created in the FOR loop. I want to instantiate a new x object for
each iteration of the FOR loop

[George Sakkis]

Re: object creation

On Nov 14, 5:16 pm, BiraRai <bira...@gmail. comwrote:

for record in roll:
    x = box()
    x.createSomethi ng(record)
    do something ....
>
Can anyone tell me why python keeps return the original object x that
was created in the FOR loop.  I want to instantiate a new x object for
each iteration of the FOR loop

What is box()? Pasting its definition would help.

George

[BiraRai]

Re: object creation

On Nov 14, 5:44 pm, George Sakkis <george.sak...@ gmail.comwrote:

On Nov 14, 5:16 pm, BiraRai <bira...@gmail. comwrote:
>

for record in roll:
    x = box()
    x.createSomethi ng(record)
    do something ....

>

Can anyone tell me why python keeps return the original object x that
was created in the FOR loop.  I want to instantiate a new x object for
each iteration of the FOR loop

>
What is box()? Pasting its definition would help.
>
George

class box:
a = int()
b = int()

def createSomething (self,x):

[Jerry Hill]

Re: object creation

On Fri, Nov 14, 2008 at 6:10 PM, BiraRai <birarai@gmail. comwrote:

class box:
a = int()
b = int()
>
def createSomething (self,x):

At a guess, x = box() does create a new instance of your box class,
but since you've declared a and b to be class variables instead of
instance variables, it doesn't look that way to you.

Try adding the line:
print id(x)
after you call x = box(), and you should see that.

Then add
def __init__(self):
a = 0
b = 0

to your box class to make a and b instance variables.

--
Jerry

[Joe Strout]

Re: object creation

On Nov 14, 2008, at 4:33 PM, Jerry Hill wrote:

Then add
def __init__(self):
a = 0
b = 0
>
to your box class to make a and b instance variables.

Doesn't that have to be "self.a" and "self.b"?

Best,
- Joe

[Steven D'Aprano]

Re: object creation

On Fri, 14 Nov 2008 16:38:15 -0700, Joe Strout wrote:

On Nov 14, 2008, at 4:33 PM, Jerry Hill wrote:
>

>Then add
>def __init__(self):
> a = 0
> b = 0
>>
>to your box class to make a and b instance variables.

>
Doesn't that have to be "self.a" and "self.b"?

Only if you want it to work :)




--
Steven

[Jerry Hill]

Re: object creation

On Fri, Nov 14, 2008 at 6:38 PM, Joe Strout <joe@strout.net wrote:

On Nov 14, 2008, at 4:33 PM, Jerry Hill wrote:
>

>Then add
>def __init__(self):
> a = 0
> b = 0

>
Doesn't that have to be "self.a" and "self.b"?

Yes, that should indeed have been self.a and self.b! Sorry about that.

--
Jerry