attribute 'tzinfo' of 'datetime.datetime' objects is not writable

Question

How do I set the timezone of a datetime instance that just came out of the datastore?

When it first comes out it is in UTC. I want to change it to EST.

I\'m try

Answer 1

datetime's objects are immutable, so you never change any of their attributes -- you make a new object with some attributes the same, and some different, and assign it to whatever you need to assign it to.

I.e., in your case, instead of

book.creationTime.tzinfo = EST

you have to code

book.creationTime = book.creationTime.replace(tzinfo=EST)