Uppercase global constants (#238)

This is a massive patch essentially upper-casing global/class attributes
that mean to be constants.

Some previously exposed constants have been preserved for compatibility
reasons (notably, in `hlapi`), though the rest might break user code relying
on pysnmp 4.

1 files changed, 3 insertions, 1 deletions

diff --git a/pysnmp/carrier/twisted/dispatch.py b/pysnmp/carrier/twisted/dispatch.py
index def16f6f..cacc20b4 100644
--- a/pysnmp/carrier/twisted/dispatch.py
+++ b/pysnmp/carrier/twisted/dispatch.py
@@ -34,9 +34,11 @@ class TwistedDispatcher(AbstractTransportDispatcher):
         if not reactor.running:
             try:
                 reactor.run()
+
             except KeyboardInterrupt:
                 raise
-            except:
+
+            except Exception:
                 raise PySnmpError('reactor error: %s' % ';'.join(traceback.format_exception(*sys.exc_info())))
 
     # jobstarted/jobfinished might be okay as-is