diff --git a/.pylintrc b/.pylintrc
index 5ccfad7fc0848370e39a45fec845f10ef2d99ef3..f7cf0588ac8976a6c4e613cd85992542541d576b 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -1,3 +1,8 @@
+[VARIABLES]
+# TODO(https://github.com/PyCQA/pylint/issues/1345): How does the inspection
+# not include "unused_" and "ignored_" by default?
+dummy-variables-rgx=^ignored_|^unused_
+
 [MESSAGES CONTROL]
 
 #TODO: Enable missing-docstring
@@ -15,7 +20,6 @@
 #TODO: Enable wrong-import-order
 #TODO: Enable no-value-for-parameter
 #TODO: Enable cyclic-import
-#TODO: Enable unused-variable
 #TODO: Enable redefined-outer-name
 #TODO: Enable too-many-instance-attributes
 #TODO: Enable broad-except
@@ -29,4 +33,4 @@
 #TODO: Enable too-many-nested-blocks
 #TODO: Enable super-init-not-called
 
-disable=missing-docstring,too-few-public-methods,too-many-arguments,no-init,duplicate-code,invalid-name,suppressed-message,locally-disabled,protected-access,no-name-in-module,unused-argument,fixme,wrong-import-order,no-value-for-parameter,cyclic-import,unused-variable,redefined-outer-name,too-many-instance-attributes,broad-except,too-many-locals,too-many-lines,redefined-variable-type,next-method-called,import-error,useless-else-on-loop,too-many-return-statements,too-many-nested-blocks,super-init-not-called
+disable=missing-docstring,too-few-public-methods,too-many-arguments,no-init,duplicate-code,invalid-name,suppressed-message,locally-disabled,protected-access,no-name-in-module,unused-argument,fixme,wrong-import-order,no-value-for-parameter,cyclic-import,redefined-outer-name,too-many-instance-attributes,broad-except,too-many-locals,too-many-lines,redefined-variable-type,next-method-called,import-error,useless-else-on-loop,too-many-return-statements,too-many-nested-blocks,super-init-not-called
diff --git a/src/python/grpcio/grpc/_channel.py b/src/python/grpcio/grpc/_channel.py
index e602f39aeb09d61eb5dc68b7ff4b420fa25421f3..36dfc0d7b2db1a61a9d17b3984c09221670d0d21 100644
--- a/src/python/grpcio/grpc/_channel.py
+++ b/src/python/grpcio/grpc/_channel.py
@@ -200,7 +200,7 @@ def _consume_request_iterator(request_iterator, state, call,
                 request = next(request_iterator)
             except StopIteration:
                 break
-            except Exception as e:
+            except Exception:
                 logging.exception("Exception iterating requests!")
                 call.cancel()
                 _abort(state, grpc.StatusCode.UNKNOWN,
diff --git a/src/python/grpcio/grpc/_server.py b/src/python/grpcio/grpc/_server.py
index b8e7ea17f708b3252514e51174e125343505ed1c..8dc956a374951e96ee6cc05347f1df0e9c89c1e5 100644
--- a/src/python/grpcio/grpc/_server.py
+++ b/src/python/grpcio/grpc/_server.py
@@ -342,7 +342,7 @@ def _unary_request(rpc_event, state, request_deserializer):
             if state.client is _CANCELLED or state.statused:
                 return None
             else:
-                start_server_batch_result = rpc_event.operation_call.start_server_batch(
+                rpc_event.operation_call.start_server_batch(
                     cygrpc.Operations(
                         (cygrpc.operation_receive_message(_EMPTY_FLAGS),)),
                     _receive_message(state, rpc_event.operation_call,
diff --git a/src/python/grpcio/grpc/framework/foundation/logging_pool.py b/src/python/grpcio/grpc/framework/foundation/logging_pool.py
index 7ee37373fa185fb41eacdbcd754dd22ca4160f9a..0912fba13941c063dbe92a17c4dd459828cc0f02 100644
--- a/src/python/grpcio/grpc/framework/foundation/logging_pool.py
+++ b/src/python/grpcio/grpc/framework/foundation/logging_pool.py
@@ -39,7 +39,7 @@ def _wrap(behavior):
     def _wrapping(*args, **kwargs):
         try:
             return behavior(*args, **kwargs)
-        except Exception as e:
+        except Exception:
             logging.exception(
                 'Unexpected exception from %s executed in logging pool!',
                 behavior)