Big time WTF with generators - bug?

[Paul Rubin]

Peter Otten <__peter__ at web.de> writes:
> > Â  Â for s_name, series in serialized:
> > Â  Â  Â grouped = groupby(series, keyfunc)
> > Â  Â  Â regrouped = ((k, (v[1] for v in g)) for (k,g) in grouped)
> > Â  Â  Â serieses.append((s_name, regrouped))
> 
> You are trying to store a group for later consumption here. 

Good catch, the solution is to turn that loop into a generator,
but then it has to be consumed very carefully.  This stuff
maybe presses the limits of what one can do with Python iterators
while staying sane.