How to check if date is in UTC format using pytz or datetime?

Question

I'm using the pytz module to translate a date from America/Los_Angeles timezone to UTC using the code below:

TZ = 'America/Los_Angeles'
from = pytz.timezone(TZ)
utc = from.localize(original_date).astimezone(pytz.utc)

Now, I want to test if the UTC value is actually in UTC format or not. How to do that with pytz or datetime ?

Answer 1

utc.tzinfo == pytz.utc # returns True if utc in UTC

Example:

now = datetime.datetime.now(pytz.utc)
now.tzinfo == pytz.utc # returns True

now = now.astimezone(pytz.timezone('America/Los_Angeles'))
now.tzinfo == pytz.utc # returns False