Log Message:
Changes 2.7.3:
* An ordered dictionary type
* New unittest features including test skipping, new assert methods, and test
  discovery
* A much faster io module
* Automatic numbering of fields in the str.format() method
* Float repr improvements backported from 3.x
* Tile support for Tkinter
* A backport of the memoryview object from 3.x
* Set literals
* Set and dictionary comprehensions
* Dictionary views
* New syntax for nested with statements
* The sysconfig module