You are confusing the module with the type.
Use either:
import datetime
datetime.datetime.utcnow()
or use:
from datetime import datetime
datetime.utcnow()
e.g. either reference the datetime type in the datetime module, or import that type into your namespace from the module. If you use the latter form and need other types from that module, don’t forget to import those too:
from datetime import date, datetime, timedelta
Demo of the first form:
>>> import datetime
>>> datetime
<module 'datetime' from '/Users/mj/Development/venvs/stackoverflow-2.7/lib/python2.7/lib-dynload/datetime.so'>
>>> datetime.datetime
<type 'datetime.datetime'>
>>> datetime.datetime.utcnow()
datetime.datetime(2013, 10, 4, 23, 27, 14, 678151)