pypa/pip — pull request #660 by garrypolley (2012-09-05 20:55:46+00:00)
Title: Fixing import error for tempfile

A change was made to add extra logging whenever pip log files cannot be added.

Here is the changeset that caused the issue: https://github.com/pypa/pip/commit/8ebc7a316016c4eb01cb77c8df1fe538c7bddf2a#pip/basecommand.py