/usr/lib/python2.7/dist-packages/ipykernel/tests/test_embed_kernel.py is in python-ipykernel 4.5.2-2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 | """test IPython.embed_kernel()"""
# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.
import os
import shutil
import sys
import tempfile
import time
from contextlib import contextmanager
from subprocess import Popen, PIPE
import nose.tools as nt
from jupyter_client import BlockingKernelClient
from jupyter_core import paths
from IPython.paths import get_ipython_dir
from ipython_genutils import py3compat
from ipython_genutils.py3compat import unicode_type
SETUP_TIMEOUT = 60
TIMEOUT = 15
@contextmanager
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)
connection_file = os.path.join(
paths.jupyter_runtime_dir(),
'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()
def test_embed_kernel_basic():
"""IPython.embed_kernel() is basically functional"""
cmd = '\n'.join([
'from IPython import embed_kernel',
'def go():',
' a=5',
' b="hi there"',
' embed_kernel()',
'go()',
'',
])
with setup_kernel(cmd) as client:
# oinfo a (int)
msg_id = client.inspect('a')
msg = client.get_shell_msg(block=True, timeout=TIMEOUT)
content = msg['content']
nt.assert_true(content['found'])
msg_id = client.execute("c=a*2")
msg = client.get_shell_msg(block=True, timeout=TIMEOUT)
content = msg['content']
nt.assert_equal(content['status'], u'ok')
# oinfo c (should be 10)
msg_id = client.inspect('c')
msg = client.get_shell_msg(block=True, timeout=TIMEOUT)
content = msg['content']
nt.assert_true(content['found'])
text = content['data']['text/plain']
nt.assert_in('10', text)
def test_embed_kernel_namespace():
"""IPython.embed_kernel() inherits calling namespace"""
cmd = '\n'.join([
'from IPython import embed_kernel',
'def go():',
' a=5',
' b="hi there"',
' embed_kernel()',
'go()',
'',
])
with setup_kernel(cmd) as client:
# oinfo a (int)
msg_id = client.inspect('a')
msg = client.get_shell_msg(block=True, timeout=TIMEOUT)
content = msg['content']
nt.assert_true(content['found'])
text = content['data']['text/plain']
nt.assert_in(u'5', text)
# oinfo b (str)
msg_id = client.inspect('b')
msg = client.get_shell_msg(block=True, timeout=TIMEOUT)
content = msg['content']
nt.assert_true(content['found'])
text = content['data']['text/plain']
nt.assert_in(u'hi there', text)
# oinfo c (undefined)
msg_id = client.inspect('c')
msg = client.get_shell_msg(block=True, timeout=TIMEOUT)
content = msg['content']
nt.assert_false(content['found'])
def test_embed_kernel_reentrant():
"""IPython.embed_kernel() can be called multiple times"""
cmd = '\n'.join([
'from IPython import embed_kernel',
'count = 0',
'def go():',
' global count',
' embed_kernel()',
' count = count + 1',
'',
'while True:'
' go()',
'',
])
with setup_kernel(cmd) as client:
for i in range(5):
msg_id = client.inspect('count')
msg = client.get_shell_msg(block=True, timeout=TIMEOUT)
content = msg['content']
nt.assert_true(content['found'])
text = content['data']['text/plain']
nt.assert_in(unicode_type(i), text)
# exit from embed_kernel
client.execute("get_ipython().exit_now = True")
msg = client.get_shell_msg(block=True, timeout=TIMEOUT)
time.sleep(0.2)
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