pycodestyle: Do not use bare 'except:'

A bare 'except:' catches all exceptions [1], including SystemExit,
KeyboardInterrupt, and GeneratorExit (which is not an error and should
not normally be caught by user code). In situations where you need to
catch all “normal” errors, you can catch the base class for all normal
exceptions, Exception [2].

[1] https://docs.python.org/2/howto/doanddont.html#except
[2] https://docs.python.org/2/library/exceptions.html#Exception

virtManager/host.py

@@ -686,7 +686,7 @@ class vmmHost(vmmGObjectUI):
             for net in self.conn.list_nets():
                 try:
                     net.disconnect_by_func(self.refresh_network)
-                except:
+                except Exception:
                     pass
                 net.connect("state-changed", self.refresh_network)
                 model.append([net.get_connkey(), net.get_name(), "network-idle",
@@ -936,7 +936,7 @@ class vmmHost(vmmGObjectUI):
             for iface in self.conn.list_interfaces():
                 try:
                     iface.disconnect_by_func(self.refresh_interface)
-                except:
+                except Exception:
                     pass
                 iface.connect("state-changed", self.refresh_interface)
                 model.append([iface.get_connkey(), iface.get_name(),