Fix attr update (#11)

* Fix issue with new attribute version

* Fix style

connect_box/__init__.py

@@ -50,8 +50,9 @@ async def async_get_devices(self) -> List[Device]:
         if self.token is None:
             await self.async_initialize_token()
 
-        raw = await self._async_ws_function(CMD_DEVICES)
         self.devices.clear()
+        raw = await self._async_ws_function(CMD_DEVICES)
+
         try:
             xml_root = element_tree.fromstring(raw)
             mac_adresses: List[str] = [mac.text for mac in xml_root.iter("MACAddr")]
@@ -71,15 +72,14 @@ async def async_get_devices(self) -> List[Device]:
 
     async def async_get_downstream(self):
         """Get the current downstream cable modem state."""
-
         if self.token is None:
             await self.async_initialize_token()
 
+        self.ds_channels.clear()
         raw = await self._async_ws_function(CMD_DOWNSTREAM)
 
         try:
             xml_root = element_tree.fromstring(raw)
-            self.ds_channels.clear()
             for downstream in xml_root.iter("downstream"):
                 self.ds_channels.append(
                     DownstreamChannel(
@@ -102,15 +102,14 @@ async def async_get_downstream(self):
 
     async def async_get_upstream(self):
         """Get the current upstream cable modem state."""
-
         if self.token is None:
             await self.async_initialize_token()
 
+        self.us_channels.clear()
         raw = await self._async_ws_function(CMD_UPSTREAM)
 
         try:
             xml_root = element_tree.fromstring(raw)
-            self.us_channels.clear()
             for upstream in xml_root.iter("upstream"):
                 self.us_channels.append(
                     UpstreamChannel(

connect_box/data.py

@@ -11,7 +11,7 @@ class Device:
 
     mac: str = attr.ib()
     hostname: str = attr.ib(cmp=False)
-    ip: Union[IPv4Address, IPv6Address] = attr.ib(cmp=False, convert=convert_ip)
+    ip: Union[IPv4Address, IPv6Address] = attr.ib(cmp=False, converter=convert_ip)
 
 
 @attr.s