Import opcua only where it is needed

devices/clients/opcua_connection.py

 from src.comms_client import *
-
+import opcua
 
 __all__ = ["OPCUAConnection"]
 
@@ -39,7 +39,7 @@ class OPCUAConnection(CommClient):
 		"""
 		super().__init__(on_func, fault_func, streams, try_interval)
 
-		self.client = Client(address, timeout)
+		self.client = opcua.Client(address, timeout)
 
 		# Explicitly connect
 		if not self.connect():

devices/src/comms_client.py

@@ -3,9 +3,6 @@ import socket
 import time
 import numpy
 
-import opcua
-from opcua import Client
-
 from tango import DevState