Python: Very simple strptime() call throws error

Some very simple code leads to a mystifying error, and Google gives me nothing... Code: ``` import sys import datetime for line in sys.stdin: date = datetime.datetime.strptime(line, '%Y%m%dT%H%M%S') print date ``` First few input lines on stdin: ``` 20101119T141500 20101119T164500 20110310T081500 20110310T113000 20100218T113000 ... ``` Error: ``` Traceback (most recent call last): File "time.py", line 5, in <module> date = datetime.datetime.strptime(line, '%Y%m%dT%H%M%S') File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_strptime.py", line 13, in <module> import time File "<path>", line 5, in <module> date = datetime.datetime.strptime(line, '%Y%m%dT%H%M%S') AttributeError: _strptime ``` Platform: Mac OS X 10.7.3, Python 2.7.1