refactor: remove string interpolation in favour of exception chaining

2 files changed, 9 insertions, 9 deletions

diff --git a/kazoo/protocol/connection.py b/kazoo/protocol/connection.py
index d672497..6ed5cde 100644
--- a/kazoo/protocol/connection.py
+++ b/kazoo/protocol/connection.py
@@ -806,11 +806,11 @@ class ConnectionHandler(object):
             try:
                 response = sasl_cli.process(challenge=challenge)
             except puresasl.SASLError as err:
-                raise SASLException("library error: %s" % err) from err
-            except puresasl.SASLProtocolException as err:
-                raise AuthFailedError("protocol error: %s" % err) from err
-            except Exception as err:
-                raise AuthFailedError("Unknown error: %s" % err) from err
+                raise SASLException("library error") from err
+            except puresasl.SASLProtocolException as exc:
+                raise AuthFailedError("protocol error") from exc
+            except Exception as exc:
+                raise AuthFailedError("Unknown error") from exc
 
             if sasl_cli.complete and not response:
                 break
@@ -824,9 +824,9 @@ class ConnectionHandler(object):
 
             try:
                 header, buffer, offset = self._read_header(timeout)
-            except ConnectionDropped as ex:
+            except ConnectionDropped as exc:
                 # Zookeeper simply drops connections with failed authentication
-                raise AuthFailedError("Connection dropped in SASL") from ex
+                raise AuthFailedError("Connection dropped in SASL") from exc
 
             if header.xid != xid:
                 raise RuntimeError(
diff --git a/kazoo/recipe/lock.py b/kazoo/recipe/lock.py
index 5eb66d4..59c6d8f 100644
--- a/kazoo/recipe/lock.py
+++ b/kazoo/recipe/lock.py
@@ -190,12 +190,12 @@ class Lock(object):
                 )
             except RetryFailedError:
                 pass
-            except KazooException as ex:
+            except KazooException:
                 # if we did ultimately fail, attempt to clean up
                 if not already_acquired:
                     self._best_effort_cleanup()
                     self.cancelled = False
-                raise ex
+                raise
             if gotten:
                 self.is_acquired = gotten
             if not gotten and not already_acquired: