Environment info:
$ which python /usr/bin/python $ python Python 2.6.1 (r261:67515, Jul 7 2009, 23:51:51) [GCC 4.2.1 (Apple Inc. build 5646)] on darwin $ echo $PATH /opt/local/bin:/opt/local/sbin:/sw/bin:/sw/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/usr/X11R6/bin:/opt/local/bin:/Developer/Platforms/ $ which easy_install /usr/bin/easy_install Specifically, let's try the simplejson module (I know it's the same thing as import json in 2.6, but that isn't the point)
$ sudo easy_install simplejson Searching for simplejson Reading Reading Best match: simplejson 2.1.0 Downloading Processing simplejson-2.1.0.tar.gz Running simplejson-2.1.0/setup.py -q bdist_egg --dist-dir /tmp/easy_install-Ojv_yS/simplejson-2.1.0/egg-dist-tmp-AypFWa The required version of setuptools (>=0.6c11) is not available, and can't be installed while this script is running. Please install a more recent version first, using 'easy_install -U setuptools'. (Currently using setuptools 0.6c9 (/System/Library/Frameworks/)) error: Setup script exited with 2 Okay, so I'll update setuptools...
$ sudo easy_install -U setuptools Searching for setuptools Reading Best match: setuptools 0.6c11 Processing setuptools-0.6c11-py2.6.egg setuptools 0.6c11 is already the active version in easy-install.pth Installing easy_install script to /usr/local/bin Installing easy_install-2.6 script to /usr/local/bin Using /Library/Python/2.6/site-packages/setuptools-0.6c11-py2.6.egg Processing dependencies for setuptools Finished processing dependencies for setuptools I'm not going to speculate, but this could have been caused by any number of environment changes like the Leopard -> Snow Leopard upgrade, MacPorts or Fink updates, or multiple Google App Engine updates.
2 Answers
I followed the directions on the website below, which solved the issue for me:
Namely, download the appropriate Python version and then run:
sh ./setuptools-0.6c11-py2.7.egg By default OSX uses /usr/bin/easy_install for third party package installs. This script is hardcoded to use a version of setuptools that is older than the version required by pymongo for python2.7 support. You can work around it like this:
$ easy_install -U setuptools $ python -m easy_install pymongo To upgrade do:
$ python -m easy_install -U pymongo 
