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converting datetime object in UTC to local time

Hi all,

So a lot of digging on doing this and still not a fabulous solution:

import time

# this takes the last_modified_date naive datetime, converts it to a
# UTC timetuple, converts that to a timestamp (seconds since the
# epoch), subtracts the timezone offset (in seconds), and then
converts
# that back into a timetuple... Must be an easier way...
mytime = time.localtime(time.mktime(last_modified_date.utct imetuple())
- time.timezone)

lm_date_str = time.strftime("%m/%d/%Y %I:%M %p %Z", mytime)

last_modified_date is a naive datetime.datetime object
A previous version gave me something like:

mytime =
datetime.datetime.fromtimestamp(time.mktime(last_m odified_date.utctimetuple())
- time.timezone)

lm_date_str = mytime.strftime("%m/%d/%Y %I:%M %p %Z")

But this gave me no timezone since the datetime object is still
naive. And I'm going from a datetime to a timetuple to a timestamp
back to a datetime...

All this seems like a lot of monkeying around to do something that
should be simple -- is there a simple way to do this without requiring
some other module?

thx

Matt

Jul 4 '07 #1
1 4051
How about subclass datetime.tzinfo? That way you can use asttimezone
to transfer utc to localtime. It requires an aware object though not
naive. A bit more coding, but a lot less converting...

Jim

On Jul 3, 5:16 pm, Matt <m...@vazor.comwrote:
Hi all,

So a lot of digging on doing this and still not a fabulous solution:

import time

# this takes the last_modified_date naivedatetime, converts it to a
# UTC timetuple, converts that to a timestamp (seconds since the
# epoch), subtracts the timezone offset (in seconds), and then
converts
# that back into a timetuple... Must be an easier way...
mytime = time.localtime(time.mktime(last_modified_date.utct imetuple())
- time.timezone)

lm_date_str = time.strftime("%m/%d/%Y %I:%M %p %Z", mytime)

last_modified_date is a naivedatetime.datetimeobject

A previous version gave me something like:

mytime =datetime.datetime.fromtimestamp(time.mktime(last_ modified_date.utctimetuple())
- time.timezone)

lm_date_str = mytime.strftime("%m/%d/%Y %I:%M %p %Z")

But this gave me no timezone since thedatetimeobject is still
naive. And I'm going from adatetimeto a timetuple to a timestamp
back to adatetime...

All this seems like a lot of monkeying around to do something that
should be simple -- is there a simple way to do this without requiring
some other module?

thx

Matt

Jul 6 '07 #2

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