interface: minor clean-up split out _set_proxy from init

electrum/interface.py

@@ -139,6 +139,7 @@ class Interface(PrintError):
         self.cert_path = os.path.join(self.config_path, 'certs', self.host)
         self.blockchain = None
         self.network = network
+        self._set_proxy(proxy)
 
         self.tip_header = None
         self.tip = 0
@@ -147,6 +148,10 @@ class Interface(PrintError):
         self.fut = asyncio.get_event_loop().create_task(self.run())
         self.group = SilentTaskGroup()
 
+    def diagnostic_name(self):
+        return self.host
+
+    def _set_proxy(self, proxy: dict):
         if proxy:
             username, pw = proxy.get('user'), proxy.get('password')
             if not username or not pw:
@@ -162,9 +167,6 @@ class Interface(PrintError):
         else:
             self.proxy = None
 
-    def diagnostic_name(self):
-        return self.host
-
     async def is_server_ca_signed(self, sslc):
         try:
             await self.open_session(sslc, exit_early=True)