applets/simple: fix error msg, style

artiq/applets/simple.py

@@ -4,7 +4,7 @@ import asyncio
 import os
 import string
 
-from quamash import QEventLoop, QtWidgets, QtGui, QtCore
+from quamash import QEventLoop, QtWidgets, QtCore
 
 from artiq.protocols.sync_struct import Subscriber, process_mod
 from artiq.protocols import pyon
@@ -35,7 +35,7 @@ class AppletIPCClient(AsyncioChildComm):
             self.close_cb()
         elif reply["action"] != "embed_done":
             logger.error("unexpected action reply to embed request: %s",
-                         action)
+                         reply["action"])
             self.close_cb()
 
     def fix_initial_size(self):
@@ -79,8 +79,8 @@ class SimpleApplet:
 
         self.argparser = argparse.ArgumentParser(description=cmd_description)
 
-        self.argparser.add_argument("--update-delay", type=float,
-            default=default_update_delay,
+        self.argparser.add_argument(
+            "--update-delay", type=float, default=default_update_delay,
             help="time to wait after a mod (buffering other mods) "
                  "before updating (default: %(default).2f)")
 
@@ -94,8 +94,9 @@ class SimpleApplet:
             "--port", default=3250, type=int,
             help="TCP port to connect to")
 
-        self.argparser.add_argument("--embed", default=None,
-            help="embed into GUI", metavar="IPC_ADDRESS")
+        self.argparser.add_argument(
+            "--embed", default=None, help="embed into GUI",
+            metavar="IPC_ADDRESS")
 
         self._arggroup_datasets = self.argparser.add_argument_group("datasets")