I have an object of <class 'datetime.datetime'>.
obj = datetime.datetime(2021, 6, 28, 2, 15, tzinfo=<FixedOffset '-07:00'>)
The time zone is PDT(offset -7:00). I need to convert it to UTC.
So if the object has datetime as 2021-05-02 10:00:00.000 -07:00.
It should be changed to 2021-05-02 17:00:00.000 +00:00.
How to achieve this in python?