I installed the newer version of python (3.2.3) than the one available in Fedora16 (python2.7)
And now yum stops working. It shows the following error.
[root@localhost yum-3.4.3]# yum
File "/usr/bin/yum", line 30
except KeyboardInterrupt, e:
^
Because yum dose not support Python3. You can run command vi /usr/bin/yum, change /usr/bin/python to /usr/bin/python2 in first line. Thus you can run the command yum by Python2 instead of Python3.