python time now other timezone
#as an aware datetime
from datetime import datetime, timezone
utc_dt = datetime.now(timezone.utc) # UTC time
dt = utc_dt.astimezone() # local time
#or from pytz database
import pytz
tz = pytz.timezone('Europe/Berlin')
berlin_now = datetime.now(tz)convert timezone python
import pytz
from dateutil import tz
from datetime import datetime, timedelta
# must read source link else Bug:
NYC_p = pytz.timezone('America/New_York') # 1.53 µs
NYC_d = tz.gettz('America/New_York') # 863 ns
# tz Awareness
dt_p = NYC_p.localize(datetime(2018, 11, 1)) # 35.4 µs
dt_d = datetime(2018, 11, 1, tzinfo=NYC_d) # 1.38 µs
dt_p.utcoffset() # 655 ns
dt_d.utcoffset() # 13.9 µs
LA_p = pytz.timezone('America/Los_Angeles')
LA_d = tz.gettz('America/Los_Angeles')
# tz Conversion
NYC_p.localize(datetime(2018, 11, 1)).astimezone(LA_p) # 44.8 µs
datetime(2018, 11, 1, tzinfo=NYC_d).astimzone(LA_d) # 32.8 µs
# ~~~~~ Date Arithmetic
dt_winter = datetime(2018, 2, 14, 12, tzinfo=NYC_d)
dt_spring = dt_winter + timedelta(days=60)
print(dt_spring)
# 2018-04-15 12:00:00-04:00 # correct
dt_winter = NYC_p.localize(datetime(2018, 2, 14, 12)) # potential Bug vector1
dt_spring = dt_winter + timedelta(days=60)
print(dt_spring)
# 2018-04-15 12:00:00-05:00 # incorrect. subtle gotcha!
print(NYC_p.normalize(dt_spring)) # potential Bug vector2
# 2018-04-15 13:00:00-04:00 # correctCopyright © 2021 Codeinu
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