Fix linter errors

Author: afurche

dynatrace_extension/sdk/callback.py

@@ -149,7 +149,6 @@ def get_next_execution_timestamp(self) -> float:
         """
         Get the timestamp for the next execution of the callback
         This is done using execution total, the interval and the start timestamp
-        :return: datetime
+        :return: float
         """
         return self.start_timestamp_monotonic + self.interval.total_seconds() * (self.iterations or 1)
-

dynatrace_extension/sdk/extension.py

@@ -778,7 +778,7 @@ def _parse_args(self):
         parser.add_argument("--secrets", required=False, default="secrets.json")
         parser.add_argument("--no-print-metrics", required=False, action="store_true")
 
-        args, unknown = parser.parse_known_args()
+        args, _ = parser.parse_known_args()
         self._is_fastcheck = args.fastcheck
         if args.dsid is None:
             # DEV mode

tests/sdk/test_extension.py

@@ -1,7 +1,7 @@
 import threading
 import time
 import unittest
-from datetime import datetime, timedelta
+from datetime import timedelta
 from unittest.mock import MagicMock, mock_open, patch
 
 import pytest
@@ -387,15 +387,15 @@ def test_fastcheck_exception(self):
         extension._client = MagicMock()
 
         fastcheck = MagicMock()
-        fastcheck.side_effect = Exception("SomeException")
+        fastcheck.side_effect = ImportError("SomeException")
         extension.register_fastcheck(fastcheck)
-        self.assertRaises(Exception, extension._run_fastcheck)
+        self.assertRaises(ImportError, extension._run_fastcheck)
 
         fastcheck.assert_called_once()
         extension._client.send_status.assert_called_once()
         self.assertEqual(extension._client.send_status.call_args[0][0].status, StatusValue.GENERIC_ERROR)
         self.assertIn(
-            "Python datasource fastcheck error: Exception('SomeException')",
+            "Python datasource fastcheck error: ImportError('SomeException')",
             extension._client.send_status.call_args[0][0].message,
         )