Import _psycopg as the first module in the package

Failing to do so, the real cause of the _psycopg import failed may get
hidden and people may get a misleading error such as "cannot import name
tz" instead.

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/__init__.py b/lib/__init__.py
index 4b9e22a..48a9847 100644
--- a/lib/__init__.py
+++ b/lib/__init__.py
@@ -62,7 +62,9 @@ if sys.version_info[0] >= 2 and sys.version_info[1] >= 4:
             RuntimeWarning)
 del sys, warnings
 
-from psycopg2 import tz
+# Note: the first internal import should be _psycopg, otherwise the real cause
+# of a failed loading of the C module may get hidden, see
+# http://archives.postgresql.org/psycopg/2011-02/msg00044.php
 
 # Import the DBAPI-2.0 stuff into top-level module.
 
@@ -78,6 +80,9 @@ from psycopg2._psycopg import NotSupportedError, OperationalError
 from psycopg2._psycopg import connect, apilevel, threadsafety, paramstyle
 from psycopg2._psycopg import __version__
 
+from psycopg2 import tz
+
+
 # Register default adapters.
 
 import psycopg2.extensions as _ext