On 2/1/2014 9:12 AM, andrea crotti wrote:
I'm giving a talk tomorrow @Fosdem about generators/iterators/iterables..
The slides are here (forgive the strange Chinese characters):
https://dl.dropboxusercontent.com/u/3183120/talks/generators/index.html#3
and the code I'm using is:
https://github.com/AndreaCrotti/generators/blob/master/code/generators.py
and the tests:
https://github.com/AndreaCrotti/generators/blob/master/code/test_generators.py
If anyone has any feedback or want to point out I'm saying something
stupid I'd love to hear it before tomorrow (or also later I might give
this talk again).
Comments:
The use is assert in the first slide seem bad in a couple of different
respects.
The use of 'gen_even' before it is defined.
A generator expression evaluates (better than 'yields') to a generator,
not just an iterator.
The definition of 'generator' copies the wrong and confused glossary
entry. Generator functions return generators, which are iterators with
extra behavior.
I would leave out For loop(2). The old pseudo-getitem iterator protocol
is seldom explicitly used any more, in the say you showed.
In 'Even numbers', I have no idea what the complication of next_even()
is about.
'Lazyness drawbacks' overflow_list is bizarre and useless. overflow_gen
is bizarre and buggy. If you are intentionally writing buggy code to
make a point, label it as such on the slide.
Iterators just produce values. Generators can consume as well as produce
values, which is why they can act as both iterators and coroutines.
@monocle
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Terry Jan Reedy
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