RE: [Jython-users] Jython variable scope

[brian z. <bz...@zi...>]

Paolo,

The problem is you have not defined Count to be global in set() so a lccal variable called Count is being set with the value of
newrc, not the top level variable as you expected.  To fix it:

def set(newc):
	global Count
	Count = newc

However, this is considered very bad practice.  Instead, try to build a class which contains the state, such as:

class Counter:
	def __init__(self):
		self.count = 0

c = Counter()
print c.count
c.count = 5
print c.count

While this is a bit bigger step conceptually, it will pay dividends as the scoping will be much easier to maintain.

hope this helps,

brian

>
> Hi.
>
> I have some problem to set a moduel variable into a function.
>
> I worte the following python module:
>
> ##Module mymodule.py
>
> Count = 0
>
> def get():
>      return Count
>
> def set(newc):
>      Count = newc
>
>
> >From prompt I type:
> >>> import mymodule
> >>> mymodule.get()
> 0
> >>> mymodule.set(5)
> >>> mymodule.get()
> 0
>
> I was expecting 5 !
>
> Anyone knows my mistake ?
>
> Thank you in advance.
> Paolo.