On Mon, Nov 14, 2016 at 6:25 AM, Serhiy Storchaka wrote:
> On 14.11.16 02:40, Steve D'Aprano wrote:
>>
>> I'm surprised that the inspect module doesn't appear to have isiterable
>> and isiterator functions. Here's my first attempt at both:
>
> Just use isinstance() with collections ABC classes.
E
On 14.11.16 02:40, Steve D'Aprano wrote:
I'm surprised that the inspect module doesn't appear to have isiterable and
isiterator functions. Here's my first attempt at both:
Just use isinstance() with collections ABC classes.
--
https://mail.python.org/mailman/listinfo/python-list
On Monday 14 November 2016 16:04, Chris Angelico wrote:
> True, but ISTR there being a possibility that __iter__ could raise to
> indicate that this isn't actually iterable. Maybe I'm recalling wrong.
If __iter__ raises, that's a bug :-)
Raising an exception from __iter__ appears to just fall th
On Mon, Nov 14, 2016 at 3:54 PM, Steven D'Aprano
wrote:
>> Any particular reason to write it that way, rather than:
>>
>> def isiterable(obj):
>> try:
>> iter(obj)
>> return True
>> except TypeError:
>> return False
>
>
> class BadIterable:
> def __iter__(self):
On Monday 14 November 2016 11:59, Chris Angelico wrote:
> On Mon, Nov 14, 2016 at 11:40 AM, Steve D'Aprano
> wrote:
>> def isiterable(obj):
>> """Return True if obj is an iterable, and False otherwise.
>>
>> Iterable objects can be iterated over, and they provide either
>> an __iter__
On Mon, Nov 14, 2016 at 11:40 AM, Steve D'Aprano
wrote:
> def isiterable(obj):
> """Return True if obj is an iterable, and False otherwise.
>
> Iterable objects can be iterated over, and they provide either
> an __iter__ method or a __getitem__ method.
>
> Iteration over an object
On Mon, 14 Nov 2016 07:02 am, Antoon Pardon wrote:
>
> Some time ago I read a text or saw a video on iterators and one thing
> I remember from it, is that you should do something like the following
> when working with iterators, to avoid some pitt falls.
>
> def bar(iterator):
> if iter(iter
On Mon, Nov 14, 2016 at 8:57 AM, Gregory Ewing
wrote:
> Antoon Pardon wrote:
>
>> def bar(iterator):
>> if iter(iterator) is iterator:
>> ...
>
>
> That's a way of finding out whether you can safely iterate
> over something more than once. If the object is already an
> iterator, applyi
Antoon Pardon wrote:
def bar(iterator):
if iter(iterator) is iterator:
...
That's a way of finding out whether you can safely iterate
over something more than once. If the object is already an
iterator, applying iter() to it will return the same
object, and iterating over it will c
On Mon, Nov 14, 2016 at 7:02 AM, Antoon Pardon
wrote:
> Some time ago I read a text or saw a video on iterators and one thing
> I remember from it, is that you should do something like the following
> when working with iterators, to avoid some pitt falls.
>
> def bar(iterator):
> if iter(itera
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