date and time range checking

[Maksim Kasimov]

there are few of a time periods, for example:
2005-06-08 12:30 -> 2005-06-10 15:30,
2005-06-12 12:30 -> 2005-06-14 15:30

and there is some date and time value:
2005-06-11 12:30

what is the "pythonic" way to check is the date/time value in the given periods range?

something like xrange:[color=blue][color=green][color=darkred]
>>> a = xrange(1,5)
>>> b = 3
>>> if b in a:[/color][/color][/color]
.... print "OK"


thanks

--
Best regards,
Maksim Kasimov
mailto: kasimov@i.com.u a

[Peter Hansen]

Re: date and time range checking

Maksim Kasimov wrote:[color=blue]
> what is the "pythonic" way to check is the date/time value in the given
> periods range?[/color]

Something like this, though I won't make strong claims of
"pythonicne ss". If you want to use the "in" keyword you'll want a
custom class and overriding of __contains__.

import time
from datetime import datetime

def make_datetime(s , fmt='%Y-%m-%d %H:%M'):
'''convert string to datetime'''
ts = time.mktime(tim e.strptime(s, fmt))
return datetime.fromti mestamp(ts)


def inRange(s, ranges):
dt = make_datetime(s )
for begin,end in ranges:
if begin <= dt <= end:
return True
else:
return False


ranges = [(make_datetime( b), make_datetime(e )) for (b,e) in [
('2005-06-08 12:30', '2005-06-10 15:30'),
('2005-06-12 12:30', '2005-06-14 15:30'),
]]

print inRange('2005-06-11 12:30', ranges)

[Andrew Dalke]

Re: date and time range checking

Maksim Kasimov wrote:[color=blue]
> there are few of a time periods, for example:
> 2005-06-08 12:30 -> 2005-06-10 15:30,
> 2005-06-12 12:30 -> 2005-06-14 15:30
>
> and there is some date and time value:
> 2005-06-11 12:30[/color]


[color=blue]
> what is the "pythonic" way to check is the date/time value in the given periods range?[/color]

[color=blue][color=green][color=darkred]
>>> import datetime
>>> t1 = datetime.dateti me(2005, 6, 8, 12, 30)
>>> t2 = datetime.dateti me(2005, 6, 10, 15, 30)
>>> t = datetime.dateti me(2005, 6, 9, 14, 00)
>>> if t1 < t < t2:[/color][/color][/color]
.... print "In range"
....
In range[color=blue][color=green][color=darkred]
>>> t = datetime.dateti me(2005, 6, 8, 14, 00)
>>> if t1 < t < t2:[/color][/color][/color]
.... print "In range"
....
In range[color=blue][color=green][color=darkred]
>>> t = datetime.dateti me(2005, 6, 7, 14, 00)
>>>
>>> if t1 < t < t2:[/color][/color][/color]
.... print "In range"
....[color=blue][color=green][color=darkred]
>>>[/color][/color][/color]

If you want to use the "in" syntax
[color=blue][color=green][color=darkred]
>>> class InRange:[/color][/color][/color]
.... def __init__(self, low, high):
.... self.low = low
.... self.high = high
.... def __contains__(se lf, obj):
.... return self.low < obj < self.high
....[color=blue][color=green][color=darkred]
>>> r = InRange(t1, t2)
>>> datetime.dateti me(2005, 6, 7, 14, 00) in r[/color][/color][/color]
False[color=blue][color=green][color=darkred]
>>> datetime.dateti me(2005, 6, 8, 14, 00) in r[/color][/color][/color]
True[color=blue][color=green][color=darkred]
>>> datetime.dateti me(2005, 6, 9, 14, 00) in r[/color][/color][/color]
True[color=blue][color=green][color=darkred]
>>> datetime.dateti me(2005, 6, 9, 18, 00) in r[/color][/color][/color]
True[color=blue][color=green][color=darkred]
>>> datetime.dateti me(2005, 6, 10, 18, 00) in r[/color][/color][/color]
False[color=blue][color=green][color=darkred]
>>>[/color][/color][/color]

Andrew
dalke@dalkescie ntific.com