django unittest bug

[freewave@…]

enviroment: python2.7 + django1.3
with the steps below:

• 1 django-admin.py startproject myapp
• 2 cd myapp
• 3 manage.py startapp foo
• 4 manage.py test

error occurs:

File "C:\Python27\lib\site-packages\django\test\simple.py", line 237, in setup_test_environment
	unittest.installHandler()
AttributeError:'module' object has no attribute 'installHandler'

problem?:
the file “site-packages\django\utils\unittest” contains the code

try:
    # check the system path first
    from unittest2 import *
except ImportError:
    if sys.version_info >= (2,7):
        # unittest2 features are native in Python 2.7
        from unittest import *
    else:
        ...

but unittest2 features are native in Python 2.7?

[Bernhard Essl]

I can't reproduce this error on my Windows XP virtual machine.

[Aymeric Augustin]

Fixed formatting, just to be able to read the bug report — please use the preview before submitting a bug.

[Aymeric Augustin]

It looks like there's an obsolete or invalid version of unittest2 installed on your machine. Can you determine which version of unittest is actually loaded by Django?

For instance, in ./manage.py shell, what's the output of:

>>> import unittest2
>>> unittest2.__file__
>>> unittest2.__version__

>>> import unittest
>>> unittest.__file__
>>> unittest.__version__

>>> from django.utils import unittest
>>> unittest.__version__

[freewave@…]

Sorry!
My prev python version is "Python 2.7a1 (r27a1:76691, Dec 6 2009, 19:41:06) on win32". The problem exists in this version.
Problem is gone when I reinstall python "Python 2.7.2 (default, Jun 12 2011, 15:08:59) [MSC v.1500 32 bit (Intel)] on win32".