access to generator state

[Kent Johnson]

Neal D. Becker wrote:
> Only one problem.  Is there any way to access the state of a generator
> externally?  In other words, the generator saves all it's local variables. 
> Can an unrelated object then query the values of those variables?  (In this
> case, to get at intermediate results)
> 

You could make the generator a method of a class and store the generator state in instance variables 
instead of local variables:

 >>> class Gen:
...   def __init__(self):
...     self.i = 0
...   def __call__(self):
...     while True:
...       yield self.i
...       self.i += 1
...
 >>> g=Gen()
 >>> g.i
0
 >>> iter=g()
 >>> iter.next()
0
 >>> g.i
0
 >>> iter.next()
1
 >>> g.i
1

HTH
Kent