CODEWITHSUNDEEP
python
makkasi
makkasi

Reputation: 7288

How to get only the seconds offset from timezone

Might seem very easy for others but I couldn't find a way to get only the seconds from the timezone

>>> import datetime
>>> dstr = '2017-06-20T19:40+02:00'
>>> from dateutil.parser import parse
>>> dt = parse(dstr)
>>> dt
datetime.datetime(2017, 6, 20, 19, 40, tzinfo=tzoffset(None, 7200))

How to get only the 7200 (with - sign as well for negative, if it is negative) from the tzoffset object? I couldn't find the documentation for the tzoffset in python.

Upvotes: 1

Views: 1581

Answers (3)

Martijn Pieters
Martijn Pieters

Reputation: 1121216

The timezone is a separate object from the dateutil project, see dateutil.tz.offset:

>>> dt.tzinfo
tzoffset(None, 7200)
>>> type(dt.tzinfo)
<class 'dateutil.tz.tz.tzoffset'>

The official API is to use the tzinfo.utcoffset() method, passing in the datetime instance:

>>> dt.tzinfo.utcoffset(dt)
datetime.timedelta(0, 7200)
>>> dt.tzinfo.utcoffset(dt).seconds
7200

The documentation doesn't specify any attributes for the dateutil.tz.offset object; it is not designed for direct interrogation. If you don't want to use the tzinfo.utcoffset() method, then dir() reveals what we can access:

>>> from pprint import pprint
>>> pprint(dir(dt.tzinfo))
['__class__',
 '__delattr__',
 '__dict__',
 '__dir__',
 '__doc__',
 '__eq__',
 '__format__',
 '__ge__',
 '__getattribute__',
 '__gt__',
 '__hash__',
 '__init__',
 '__init_subclass__',
 '__le__',
 '__lt__',
 '__module__',
 '__ne__',
 '__new__',
 '__reduce__',
 '__reduce_ex__',
 '__repr__',
 '__setattr__',
 '__sizeof__',
 '__str__',
 '__subclasshook__',
 '__weakref__',
 '_name',
 '_offset',
 'dst',
 'fromutc',
 'is_ambiguous',
 'tzname',
 'utcoffset']

The _offset attribute is a datetime.timedelta() object:

>>> dt.tzinfo._offset
datetime.timedelta(0, 7200)
>>> dt.tzinfo._offset.seconds
7200

The attribute is an implementation detail, so be careful not to rely too much on it.

Upvotes: 4

CoMartel
CoMartel

Reputation: 3591

This seems to work as well : 

dt.tzinfo.utcoffset(dt).total_seconds()
Out[23]: 7200.0

Upvotes: 2

Cheney
Cheney

Reputation: 980

import datetime
dstr = '2017-06-20T19:40+02:00'
from dateutil.parser import parse
dt = parse(dstr)
print(dt.timetz().utcoffset().seconds)
7200

detail see: time.tzinfo

Upvotes: 0

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