Kelsey Hightower's patch to issue #34 (in github) -- Issue when trying to remove from list twice.

patch_issue_34.patch

# HG changeset patch -- Bitbucket.org
# Project pip
# URL https://bitbucket.org/khightower/pip/overview
# User Kelsey Hightower <kelsey.hightower@gmail.com>
# Date 1296943694 18000
# Node ID 384c3784a22c449e80b58d5ba159f637e84f5cc7
# Parent  0542924d062debf8a4b9a8c83da8241411955139
Fixing #205 -- Issue when trying to remove from list twice.

--- a/pip/req.py
+++ b/pip/req.py
@@ -269,12 +269,13 @@ execfile(__file__)
                         if dir in dirs:
                             dirs.remove(dir)
                     for dir in dirs:
-                        # Don't search in anything that looks like a virtualenv environment
-                        if (os.path.exists(os.path.join(root, dir, 'bin', 'python'))
-                            or os.path.exists(os.path.join(root, dir, 'Scripts', 'Python.exe'))):
-                            dirs.remove(dir)
-                        # Also don't search through tests
-                        if dir == 'test' or dir == 'tests':
+                        # Don't search in anything that looks like a
+                        # virtualenv environment or test suite.
+                        if (os.path.exists(os.path.join(
+                                root, dir, 'bin', 'python')) or
+                            os.path.exists(os.path.join(
+                                root, dir, 'Scripts', 'Python.exe')) or
+                            dir == 'test' or dir == 'tests'):
                             dirs.remove(dir)
                     filenames.extend([os.path.join(root, dir)
                                      for dir in dirs])