Fix linting

Author: eht16

logstash_async/database.py

@@ -11,6 +11,7 @@
 from logstash_async.constants import constants
 from logstash_async.utils import ichunked
 
+
 DATABASE_SCHEMA_STATEMENTS = [
     '''
     CREATE TABLE IF NOT EXISTS `event` (

logstash_async/worker.py

@@ -14,7 +14,7 @@
 from limits.strategies import FixedWindowRateLimiter
 
 from logstash_async.constants import constants
-from logstash_async.database import DatabaseCache, DatabaseLockedError, DatabaseDiskIOError
+from logstash_async.database import DatabaseCache, DatabaseDiskIOError, DatabaseLockedError
 from logstash_async.memory_cache import MemoryCache
 from logstash_async.utils import safe_log_via_print
 

tests/database_test.py

@@ -3,11 +3,11 @@
 # This software may be modified and distributed under the terms
 # of the MIT license.  See the LICENSE file for details.
 
+from stat import S_IREAD, S_IRGRP, S_IROTH, S_IWUSR
 import os
 import sqlite3
 import time
 import unittest
-from stat import S_IREAD, S_IRGRP, S_IROTH, S_IWUSR
 
 from logstash_async.constants import constants
 from logstash_async.database import DATABASE_SCHEMA_STATEMENTS, DatabaseCache, DatabaseDiskIOError
@@ -64,7 +64,7 @@ def close_connection(cls):
         cls._connection = None
 
     # ----------------------------------------------------------------------
-    def testIOException(self):
+    def test_disk_io_exception(self):
         self.cache.add_event("message")
         with self.assertRaises(DatabaseDiskIOError):
             # change permissions to produce error