range and span_range with interval size

[richard-engineering]

It would be good to have a parameter for interval size for arrow.Arrow.range and arrow.Arrow.span_range.

Eg I want a range across 5 days between some start and end date, or 2 weeks, etc.

[andrewelkins]

Can you give us a code example?

[richard-engineering]

Here's an example of how I ended up implementing the code for my own use. Uses funcy. Also I ended up returning a dictionary instead of a list of tuples but that can be easily changed.

    from funcy import flatten, chunks
    import arrow

    def _split_time_range(span_type, start_time, end_time, **kwargs):
        time_range = arrow.Arrow.range(span_type, arrow.get(start_time), arrow.get(end_time))
        start_times = flatten(chunks(1, kwargs.get('interval', 1), time_range))
        start_end_times = {
            c_start_time: start_times[index + 1]
            if index + 1 < len(start_times) else end_time
            for index, c_start_time in enumerate(start_times)
        }
        return start_end_times

The idea is for me to be able to do something like this:

for r in arrow.Arrow.span_range('hour', start, end, interval=2):
    print r
(<Arrow [2013-05-05T12:00:00+00:00]>, <Arrow [2013-05-05T13:59:59.999999+00:00]>)
(<Arrow [2013-05-05T14:00:00+00:00]>, <Arrow [2013-05-05T15:59:59.999999+00:00]>)
(<Arrow [2013-05-05T16:00:00+00:00]>, <Arrow [2013-05-05T17:59:59.999999+00:00]>)
(<Arrow [2013-05-05T18:00:00+00:00]>, <Arrow [2013-05-05T19:59:59.999999+00:00]>)
(<Arrow [2013-05-05T20:00:00+00:00]>, <Arrow [2013-05-05T21:59:59.999999+00:00]>)

[andrewelkins]

Got it appreciate the example. I wonder if it would be more expressive to use a new method called "interval" for this purpose.

[richard-engineering]

Having a new method called interval sounds fine. Could probably use arrow.range and arrow.span_range underneath like the example.

[andrewelkins]

Exactly. No need to duplicate code.

…

On Thu, Dec 1, 2016 at 1:09 PM rhan-mentad ***@***.***> wrote: Having a new method called interval sounds fine. Could probably use arrow.range and arrow.span_range underneath like the example. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#362 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AG69mQ-n3cnEm3BM_javsLsL0QpHz9MYks5rDzdugaJpZM4KUNB3> .

[systemcatch]

Done in #386 so closing.

[dongli]

It seems interval corresponds to span_range. What about range, when I just need one single value of time, not a tuple?

[systemcatch]

@dongli something like this?

(arrow) chris@ThinkPad:~/arrow$ python
Python 3.7.4 (default, Sep 19 2019, 11:01:37) 
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import arrow
>>> right_now=arrow.utcnow()
>>> five_hours_ago=right_now.shift(hours=-5)
>>> right_now
<Arrow [2020-03-06T20:12:27.474979+00:00]>
>>> five_hours_ago
<Arrow [2020-03-06T15:12:27.474979+00:00]>
>>> list(arrow.Arrow.range("minute", five_hours_ago, right_now, limit=1))
[<Arrow [2020-03-06T15:12:27.474979+00:00]>]