def setup_kernel(cmd):
"""start an embedded kernel in a subprocess, and wait for it to be ready
Returns
-------
kernel_manager: connected KernelManager instance
"""
kernel = Popen([sys.executable, '-c', cmd], stdout=PIPE, stderr=PIPE, env=env)
connection_file = os.path.join(IPYTHONDIR,
'profile_default',
'security',
'kernel-%i.json' % kernel.pid
)
# wait for connection file to exist, timeout after 5s
tic = time.time()
while not os.path.exists(connection_file) \
and kernel.poll() is None \
and time.time() < tic + SETUP_TIMEOUT:
time.sleep(0.1)
if kernel.poll() is not None:
o,e = kernel.communicate()
e = py3compat.cast_unicode(e)
raise IOError("Kernel failed to start:\n%s" % e)
if not os.path.exists(connection_file):
if kernel.poll() is None:
kernel.terminate()
raise IOError("Connection file %r never arrived" % connection_file)
client = BlockingKernelClient(connection_file=connection_file)
client.load_connection_file()
client.start_channels()
client.wait_for_ready()
try:
yield client
finally:
client.stop_channels()
kernel.terminate()
from IPython.lib.kernel import find_connection_file
from IPython.kernel import BlockingKernelClient
import os
# <codecell>
cf = '/home/epilib/Envs/env1/.ipython/profile_default/security/kernel-c5bd6be3-7df6-4b6f-8289-4d54908e39db.json'
# <codecell>
cf = '/home/usgs/.ipython/profile_default/security/kernel-632e13a5-00f5-422c-9588-34b195bc2349.json'
# <codecell>
km = BlockingKernelClient(connection_file=cf)
# <codecell>
km.load_connection_file()
# <codecell>
km.start_channels()
# <codecell>
def run_cell(km, code):
# now we can run code. This is done on the shell channel
shell = km.shell_channel
print
