動的にtzinfoサブクラスを作ってdatetimeオブジェクトを異なるタイムゾーンに変換する

create_tzinfo.py

#!/usr/bin/env python
from datetime import *

def create_tzinfo(name, offset_hours=0, offset_dst=0):
    my_tzinfo = type(name, (tzinfo, ), {})
    my_tzinfo.utcoffset = lambda self, dt: timedelta(hours=offset_hours)
    my_tzinfo.dst = lambda self, dt: timedelta(offset_dst)
    my_tzinfo.tzname = lambda self, dt: name

    return my_tzinfo

def to_jst():
    # tzinfoのサブクラスを生成
    UTC = create_tzinfo('UTC', 0)
    JST = create_tzinfo('JST', 9)

    # UTC -> JSTに変換
    utc_datetime = datetime.now(UTC())
    jst_datetime = utc_datetime.astimezone(JST())
    print('from(UTC): %s \nto(JST):   %s' % (utc_datetime, jst_datetime))


if __name__ == '__main__':
    to_jst()