[Tutor] advice on global variables

[Prasad, Ramit]

> 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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