update to latest ipykernel

packages/python/yap_kernel/examples/embedding/internal_ipkernel.py

@@ -0,0 +1,55 @@
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+
+import sys
+
+from IPython.lib.kernel import connect_qtconsole
+from IPython.kernel.zmq.kernelapp import YAP_KernelApp
+
+#-----------------------------------------------------------------------------
+# Functions and classes
+#-----------------------------------------------------------------------------
+def mpl_kernel(gui):
+    """Launch and return an IPython kernel with matplotlib support for the desired gui
+    """
+    kernel = YAP_KernelApp.instance()
+    kernel.initialize(['python', '--matplotlib=%s' % gui,
+                       #'--log-level=10'
+                       ])
+    return kernel
+
+
+class InternalYAPKernel(object):
+
+    def init_yapkernel(self, backend):
+        # Start IPython kernel with GUI event loop and mpl support
+        self.yapkernel = mpl_kernel(backend)
+        # To create and track active qt consoles
+        self.consoles = []
+        
+        # This application will also act on the shell user namespace
+        self.namespace = self.yapkernel.shell.user_ns
+
+        # 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['yapkernel'] = self.yapkernel  # dbg
+
+    def print_namespace(self, evt=None):
+        print("\n***Variables in User namespace***")
+        for k, v in self.namespace.items():
+            if not k.startswith('_'):
+                print('%s -> %r' % (k, v))
+        sys.stdout.flush()
+
+    def new_qt_console(self, evt=None):
+        """start a new qtconsole connected to our kernel"""
+        return connect_qtconsole(self.yapkernel.abs_connection_file, profile=self.yapkernel.profile)
+
+    def count(self, evt=None):
+        self.namespace['app_counter'] += 1
+
+    def cleanup_consoles(self, evt=None):
+        for c in self.consoles:
+            c.kill()