[Tutor] advice on global variables

[James Reynolds]

On Tue, Jul 10, 2012 at 4:32 PM, Prasad, Ramit <ramit.prasad at jpmorgan.com>wrote:

> > You should avoid using the global statement.
> >
> > In your case, I would think you could just add an argument to the method:
> >
> > class MyObj(object):
> >     def __init__(self, arg):
> >         self.arg = arg
> >     def my_func(self, new_arg):
> >         self.arg = new_arg
> >
> > to call it:
> >
> > arg = 1
> >
> > m = MyObj(arg)
> > print m.arg
> > new_arg = 2
> > m.my_func(new_arg)
> > print m.arg
>
> Just as a note, this would not really work if the variable needs to be
> changed and read from several places when the value is an immutable
> type such as numbers / strings. In that case, then you could use
> the same logic but instead place the value in a list and pass that
> and always check/update the first element of the list.
>
>
> Ramit
>
>
> Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology
> 712 Main Street | Houston, TX 77002
> work phone: 713 - 216 - 5423
>
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In this case, you can read the attribute of MyObj and you just pass an
instantiated MyObj around to where it is needed.
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