Merge branch 'release/1.1'1.1

1 files changed, 10 insertions, 0 deletions

diff --git a/pip/exceptions.py b/pip/exceptions.py
index 1ad1a616d..22f554a76 100644
--- a/pip/exceptions.py
+++ b/pip/exceptions.py
@@ -13,5 +13,15 @@ class DistributionNotFound(InstallationError):
     """Raised when a distribution cannot be found to satisfy a requirement"""
 
 
+class BestVersionAlreadyInstalled(Exception):
+    """Raised when the most up-to-date version of a package is already
+    installed.
+    """
+
+
 class BadCommand(Exception):
     """Raised when virtualenv or a command is not found"""
+
+
+class CommandError(Exception):
+    """Raised when there is an error in command-line arguments"""