Version 3.3.3. Accomodate Python 2.7.x versions < 2.7.9.3.3.3

The SSL module includes in Python versions < 2.7.9 does not include
the SSLWantReadError or SSLWantWriteError exceptions. As such we can't
assume they are present just because the ssl module happens to be installed.

Fixes #1197

3 files changed, 6 insertions, 3 deletions

diff --git a/CHANGES b/CHANGES
index 8c29266..53786d0 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+* 3.3.3
+    * The SSL module in Python < 2.7.9 handles non-blocking sockets
+      differently than 2.7.9+. This patch accomodates older versions. #1197
 * 3.3.2
     * Further fixed a regression introduced in 3.3.0 involving SSL and
       non-blocking sockets. #1197
diff --git a/redis/__init__.py b/redis/__init__.py
index 234bd65..2d586c6 100644
--- a/redis/__init__.py
+++ b/redis/__init__.py
@@ -29,7 +29,7 @@ def int_or_str(value):
         return value
 
 
-__version__ = '3.3.2'
+__version__ = '3.3.3'
 VERSION = tuple(map(int_or_str, __version__.split('.')))
 
 __all__ = [
diff --git a/redis/connection.py b/redis/connection.py
index 46d3b20..e753bcb 100755
--- a/redis/connection.py
+++ b/redis/connection.py
@@ -34,9 +34,9 @@ try:
 except ImportError:
     ssl_available = False
 
-if ssl_available:
+if ssl_available and hasattr(ssl, 'SSLWantReadError'):
     # note that when using nonblocking sockets over ssl, the ssl module
-    # raises its own exceptions rather than the normal BlockingIOError
+    # in python > 2.7.9 raises its own exceptions rather than BlockingIOError
     blocking_exceptions = (
         BlockingIOError,
         ssl.SSLWantReadError,