fix making the ipython connection in python 3

Signed-off-by: Chris Granger <[email protected]>

Author: ibdknox

py-src/ltipy.py

@@ -23,11 +23,11 @@ def km_from_string(s=''):
     such as '--shell=47378 --iopub=39859 --stdin=36778 --hb=52668' for IPython 0.11
     or just 'kernel-12345.json' for IPython 0.12
     """
-    global km, kc, send, Empty
+    global km, kc, send
 
     from os.path import join as pjoin
     from IPython.config.loader import KeyValueConfigLoader
-    from Queue import Empty
+
     try:
         from IPython.kernel import (
             KernelManager,