datetime.datetime. or datetime. ?

[NiklasRTZ]

Hello, my basic question is which recommendation is after slight
restructuring datetime.datetime to datetime
Both works but only one should be chosen probably adjust my package to
comply to dependencies.
Spec integrated code where datetime.datetime.now() refactored to
datetime.now()
set rather
from datetime import datetime, timedelta
than
import datetime
or no matter and completely flexible (then why gae error that
datetime.datetime wasn't datetime?)
Naturally better not to customize external dependencies but seemingly
impossible to use both for a little xmpp project.
Thanks with best regards