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yap-6.3/packages/python/yap_kernel/examples/embedding/internal_ipkernel.py

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2017-05-14 11:27:44 +01:00
#-----------------------------------------------------------------------------
# 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()