From cb2d751cea12bc701f88e381f47b773867e180f4 Mon Sep 17 00:00:00 2001
From: Ryan Leckey <rleckey@concordusapps.com>
Date: Wed, 10 Jul 2013 01:03:01 -0700
Subject: [PATCH] Add an ImproperlyConfigured exception.

 - To be used to signal when a type is being used without a
   required library.
---
 sqlalchemy_utils/__init__.py   | 2 ++
 sqlalchemy_utils/exceptions.py | 8 ++++++++
 2 files changed, 10 insertions(+)
 create mode 100644 sqlalchemy_utils/exceptions.py

diff --git a/sqlalchemy_utils/__init__.py b/sqlalchemy_utils/__init__.py
index f18b14e..cf659af 100644
--- a/sqlalchemy_utils/__init__.py
+++ b/sqlalchemy_utils/__init__.py
@@ -1,3 +1,4 @@
+from .exceptions import ImproperlyConfigured
 from .functions import (
     sort_query, defer_except, escape_like, primary_keys, table_name
 )
@@ -26,6 +27,7 @@ __version__ = '0.14.4'
 
 
 __all__ = (
+    ImproperlyConfigured,
     coercion_listener,
     sort_query,
     defer_except,
diff --git a/sqlalchemy_utils/exceptions.py b/sqlalchemy_utils/exceptions.py
new file mode 100644
index 0000000..6744366
--- /dev/null
+++ b/sqlalchemy_utils/exceptions.py
@@ -0,0 +1,8 @@
+"""Global SQLAlchemy-Utils exception classes.
+"""
+
+class ImproperlyConfigured(Exception):
+    """
+    SQLAlchemy-Utils is improperly configured; normally due to usage of
+    a utility that depends on a missing library.
+    """