update type hint in SignalAnalyzerInterface

scos_actions/hardware/sigan_iface.py

@@ -1,8 +1,9 @@
 import logging
 import time
 from abc import ABC, abstractmethod
-from typing import Optional
+from typing import Dict, Optional
 
+from its_preselector.web_relay import WebRelay
 from scos_actions.calibration.calibration import Calibration
 from scos_actions.hardware.utils import power_cycle_sigan
 from scos_actions.utils import convert_string_to_millisecond_iso_format
@@ -26,7 +27,7 @@ def __init__(
         self,
         sensor_cal: Optional[Calibration] = None,
         sigan_cal: Optional[Calibration] = None,
-        switches: Optional[dict] = None,
+        switches: Optional[Dict[str, WebRelay]] = None,
     ):
         self.sensor_calibration_data = {}
         self.sigan_calibration_data = {}