Backport PR #330: more complete error message

jupyter · Jan 6, 2018 · 3e416c2 · 3e416c2
1 parent 50c92b1
commit 3e416c2
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/jupyter_client/manager.py b/jupyter_client/manager.py
@@ -229,9 +229,10 @@ def start_kernel(self, **kw):
         """
         if self.transport == 'tcp' and not is_local_ip(self.ip):
             raise RuntimeError("Can only launch a kernel on a local interface. "
+                               "This one is not: %s."
                                "Make sure that the '*_address' attributes are "
                                "configured properly. "
-                               "Currently valid addresses are: %s" % local_ips()
+                               "Currently valid addresses are: %s" % (self.ip, local_ips())
                                )
 
         # write connection file / get default ports