remove hardcoded hb port from internal example

The Related bug has been fixed.

docs/examples/lib/internal_ipkernel.py

@@ -1,68 +1,65 b''
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
 import subprocess
 import sys
 
 from IPython.zmq.ipkernel import IPKernelApp
 
 #-----------------------------------------------------------------------------
 # Functions and classes
 #-----------------------------------------------------------------------------
 def pylab_kernel(gui):
     """Launch and return an IPython kernel with pylab support for the desired gui
     """
     kernel = IPKernelApp()
-    # FIXME: we're hardcoding the heartbeat port b/c of a bug in IPython 0.11
-    # that will set it to 0 if not specified.  Once this is fixed, the --hb
-    # parameter can be omitted and all ports will be automatic
-    kernel.initialize(['python', '--pylab=%s' % gui, '--hb=19999',
+    kernel.initialize(['python', '--pylab=%s' % gui,
                        #'--log-level=10'
                        ])
     return kernel
 
 
 def qtconsole_cmd(kernel):
     """Compute the command to connect a qt console to an already running kernel
     """
     ports = ['--%s=%d' % (name, port) for name, port in kernel.ports.items()]
     return ['ipython', 'qtconsole', '--existing'] + ports
 
 
 class InternalIPKernel(object):
 
     def init_ipkernel(self, backend):
         # Start IPython kernel with GUI event loop and pylab support
         self.ipkernel = pylab_kernel(backend)
         # To create and track active qt consoles
         self._qtconsole_cmd = qtconsole_cmd(self.ipkernel)
         self.consoles = []
         
         # This application will also act on the shell user namespace
         self.namespace = self.ipkernel.shell.user_ns
         # Keys present at startup so we don't print the entire pylab/numpy
         # namespace when the user clicks the 'namespace' button
         self._init_keys = set(self.namespace.keys())
 
         # Example: a variable that will be seen by the user in the shell, and
         # that the GUI modifies (the 'Counter++' button increments it):
         self.namespace['app_counter'] = 0
         #self.namespace['ipkernel'] = self.ipkernel  # dbg
 
     def print_namespace(self, evt=None):
         print "\n***Variables in User namespace***"
         for k, v in self.namespace.iteritems():
             if k not in self._init_keys and not k.startswith('_'):
                 print '%s -> %r' % (k, v)
         sys.stdout.flush()
 
     def new_qt_console(self, evt=None):
         self.consoles.append(subprocess.Popen(self._qtconsole_cmd))
 
     def count(self, evt=None):
         self.namespace['app_counter'] += 1
 
     def cleanup_consoles(self, evt=None):
         for c in self.consoles:
             c.kill()