|
|
#!/usr/bin/env python
|
|
|
"""A simple interactive kernel that talks to a frontend over 0MQ.
|
|
|
|
|
|
Things to do:
|
|
|
|
|
|
* Implement `set_parent` logic. Right before doing exec, the Kernel should
|
|
|
call set_parent on all the PUB objects with the message about to be executed.
|
|
|
* Implement random port and security key logic.
|
|
|
* Implement control messages.
|
|
|
* Implement event loop and poll version.
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
from __future__ import print_function
|
|
|
|
|
|
# Standard library imports.
|
|
|
import __builtin__
|
|
|
import atexit
|
|
|
import sys
|
|
|
import time
|
|
|
import traceback
|
|
|
import logging
|
|
|
from signal import (
|
|
|
signal, default_int_handler, SIGINT, SIG_IGN
|
|
|
)
|
|
|
# System library imports.
|
|
|
import zmq
|
|
|
|
|
|
# Local imports.
|
|
|
from IPython.core import pylabtools
|
|
|
from IPython.config.configurable import Configurable
|
|
|
from IPython.config.application import boolean_flag, catch_config_error
|
|
|
from IPython.core.application import ProfileDir
|
|
|
from IPython.core.error import StdinNotImplementedError
|
|
|
from IPython.core.shellapp import (
|
|
|
InteractiveShellApp, shell_flags, shell_aliases
|
|
|
)
|
|
|
from IPython.utils import io
|
|
|
from IPython.utils import py3compat
|
|
|
from IPython.utils.frame import extract_module_locals
|
|
|
from IPython.utils.jsonutil import json_clean
|
|
|
from IPython.utils.traitlets import (
|
|
|
Any, Instance, Float, Dict, CaselessStrEnum
|
|
|
)
|
|
|
|
|
|
from entry_point import base_launch_kernel
|
|
|
from kernelapp import KernelApp, kernel_flags, kernel_aliases
|
|
|
from session import Session, Message
|
|
|
from zmqshell import ZMQInteractiveShell
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Main kernel class
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class Kernel(Configurable):
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# Kernel interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
# attribute to override with a GUI
|
|
|
eventloop = Any(None)
|
|
|
|
|
|
shell = Instance('IPython.core.interactiveshell.InteractiveShellABC')
|
|
|
session = Instance(Session)
|
|
|
profile_dir = Instance('IPython.core.profiledir.ProfileDir')
|
|
|
shell_socket = Instance('zmq.Socket')
|
|
|
iopub_socket = Instance('zmq.Socket')
|
|
|
stdin_socket = Instance('zmq.Socket')
|
|
|
log = Instance(logging.Logger)
|
|
|
|
|
|
user_module = Instance('types.ModuleType')
|
|
|
def _user_module_changed(self, name, old, new):
|
|
|
if self.shell is not None:
|
|
|
self.shell.user_module = new
|
|
|
|
|
|
user_ns = Dict(default_value=None)
|
|
|
def _user_ns_changed(self, name, old, new):
|
|
|
if self.shell is not None:
|
|
|
self.shell.user_ns = new
|
|
|
self.shell.init_user_ns()
|
|
|
|
|
|
# Private interface
|
|
|
|
|
|
# Time to sleep after flushing the stdout/err buffers in each execute
|
|
|
# cycle. While this introduces a hard limit on the minimal latency of the
|
|
|
# execute cycle, it helps prevent output synchronization problems for
|
|
|
# clients.
|
|
|
# Units are in seconds. The minimum zmq latency on local host is probably
|
|
|
# ~150 microseconds, set this to 500us for now. We may need to increase it
|
|
|
# a little if it's not enough after more interactive testing.
|
|
|
_execute_sleep = Float(0.0005, config=True)
|
|
|
|
|
|
# Frequency of the kernel's event loop.
|
|
|
# Units are in seconds, kernel subclasses for GUI toolkits may need to
|
|
|
# adapt to milliseconds.
|
|
|
_poll_interval = Float(0.05, config=True)
|
|
|
|
|
|
# If the shutdown was requested over the network, we leave here the
|
|
|
# necessary reply message so it can be sent by our registered atexit
|
|
|
# handler. This ensures that the reply is only sent to clients truly at
|
|
|
# the end of our shutdown process (which happens after the underlying
|
|
|
# IPython shell's own shutdown).
|
|
|
_shutdown_message = None
|
|
|
|
|
|
# This is a dict of port number that the kernel is listening on. It is set
|
|
|
# by record_ports and used by connect_request.
|
|
|
_recorded_ports = Dict()
|
|
|
|
|
|
|
|
|
|
|
|
def __init__(self, **kwargs):
|
|
|
super(Kernel, self).__init__(**kwargs)
|
|
|
|
|
|
# Before we even start up the shell, register *first* our exit handlers
|
|
|
# so they come before the shell's
|
|
|
atexit.register(self._at_shutdown)
|
|
|
|
|
|
# Initialize the InteractiveShell subclass
|
|
|
self.shell = ZMQInteractiveShell.instance(config=self.config,
|
|
|
profile_dir = self.profile_dir,
|
|
|
user_module = self.user_module,
|
|
|
user_ns = self.user_ns,
|
|
|
)
|
|
|
self.shell.displayhook.session = self.session
|
|
|
self.shell.displayhook.pub_socket = self.iopub_socket
|
|
|
self.shell.display_pub.session = self.session
|
|
|
self.shell.display_pub.pub_socket = self.iopub_socket
|
|
|
|
|
|
# TMP - hack while developing
|
|
|
self.shell._reply_content = None
|
|
|
|
|
|
# Build dict of handlers for message types
|
|
|
msg_types = [ 'execute_request', 'complete_request',
|
|
|
'object_info_request', 'history_request',
|
|
|
'connect_request', 'shutdown_request',
|
|
|
'apply_request',
|
|
|
]
|
|
|
self.handlers = {}
|
|
|
for msg_type in msg_types:
|
|
|
self.handlers[msg_type] = getattr(self, msg_type)
|
|
|
|
|
|
control_msg_types = [ 'clear_request', 'abort_request' ]
|
|
|
self.control_handlers = {}
|
|
|
for msg_type in control_msg_types:
|
|
|
self.control_handlers[msg_type] = getattr(self, msg_type)
|
|
|
|
|
|
def do_one_iteration(self):
|
|
|
"""Do one iteration of the kernel's evaluation loop.
|
|
|
"""
|
|
|
|
|
|
try:
|
|
|
ident,msg = self.session.recv(self.shell_socket, zmq.NOBLOCK)
|
|
|
except Exception:
|
|
|
self.log.warn("Invalid Message:", exc_info=True)
|
|
|
return
|
|
|
if msg is None:
|
|
|
return
|
|
|
|
|
|
msg_type = msg['header']['msg_type']
|
|
|
|
|
|
# This assert will raise in versions of zeromq 2.0.7 and lesser.
|
|
|
# We now require 2.0.8 or above, so we can uncomment for safety.
|
|
|
# print(ident,msg, file=sys.__stdout__)
|
|
|
assert ident is not None, "Missing message part."
|
|
|
|
|
|
# Print some info about this message and leave a '--->' marker, so it's
|
|
|
# easier to trace visually the message chain when debugging. Each
|
|
|
# handler prints its message at the end.
|
|
|
self.log.debug('\n*** MESSAGE TYPE:%s***', msg_type)
|
|
|
self.log.debug(' Content: %s\n --->\n ', msg['content'])
|
|
|
|
|
|
# Find and call actual handler for message
|
|
|
handler = self.handlers.get(msg_type, None)
|
|
|
if handler is None:
|
|
|
self.log.error("UNKNOWN MESSAGE TYPE: %s", msg)
|
|
|
else:
|
|
|
handler(ident, msg)
|
|
|
|
|
|
# Check whether we should exit, in case the incoming message set the
|
|
|
# exit flag on
|
|
|
if self.shell.exit_now:
|
|
|
self.log.debug('\nExiting IPython kernel...')
|
|
|
# We do a normal, clean exit, which allows any actions registered
|
|
|
# via atexit (such as history saving) to take place.
|
|
|
sys.exit(0)
|
|
|
|
|
|
|
|
|
def start(self):
|
|
|
""" Start the kernel main loop.
|
|
|
"""
|
|
|
# a KeyboardInterrupt (SIGINT) can occur on any python statement, so
|
|
|
# let's ignore (SIG_IGN) them until we're in a place to handle them properly
|
|
|
signal(SIGINT,SIG_IGN)
|
|
|
poller = zmq.Poller()
|
|
|
poller.register(self.shell_socket, zmq.POLLIN)
|
|
|
# loop while self.eventloop has not been overridden
|
|
|
while self.eventloop is None:
|
|
|
try:
|
|
|
# scale by extra factor of 10, because there is no
|
|
|
# reason for this to be anything less than ~ 0.1s
|
|
|
# since it is a real poller and will respond
|
|
|
# to events immediately
|
|
|
|
|
|
# double nested try/except, to properly catch KeyboardInterrupt
|
|
|
# due to pyzmq Issue #130
|
|
|
try:
|
|
|
poller.poll(10*1000*self._poll_interval)
|
|
|
# restore raising of KeyboardInterrupt
|
|
|
signal(SIGINT, default_int_handler)
|
|
|
self.do_one_iteration()
|
|
|
except:
|
|
|
raise
|
|
|
finally:
|
|
|
# prevent raising of KeyboardInterrupt
|
|
|
signal(SIGINT,SIG_IGN)
|
|
|
except KeyboardInterrupt:
|
|
|
# Ctrl-C shouldn't crash the kernel
|
|
|
io.raw_print("KeyboardInterrupt caught in kernel")
|
|
|
# stop ignoring sigint, now that we are out of our own loop,
|
|
|
# we don't want to prevent future code from handling it
|
|
|
signal(SIGINT, default_int_handler)
|
|
|
while self.eventloop is not None:
|
|
|
try:
|
|
|
self.eventloop(self)
|
|
|
except KeyboardInterrupt:
|
|
|
# Ctrl-C shouldn't crash the kernel
|
|
|
io.raw_print("KeyboardInterrupt caught in kernel")
|
|
|
continue
|
|
|
else:
|
|
|
# eventloop exited cleanly, this means we should stop (right?)
|
|
|
self.eventloop = None
|
|
|
break
|
|
|
|
|
|
|
|
|
def record_ports(self, ports):
|
|
|
"""Record the ports that this kernel is using.
|
|
|
|
|
|
The creator of the Kernel instance must call this methods if they
|
|
|
want the :meth:`connect_request` method to return the port numbers.
|
|
|
"""
|
|
|
self._recorded_ports = ports
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# Kernel request handlers
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _publish_pyin(self, code, parent, execution_count):
|
|
|
"""Publish the code request on the pyin stream."""
|
|
|
|
|
|
self.session.send(self.iopub_socket, u'pyin', {u'code':code,
|
|
|
u'execution_count': execution_count}, parent=parent)
|
|
|
|
|
|
def execute_request(self, ident, parent):
|
|
|
|
|
|
self.session.send(self.iopub_socket,
|
|
|
u'status',
|
|
|
{u'execution_state':u'busy'},
|
|
|
parent=parent )
|
|
|
|
|
|
try:
|
|
|
content = parent[u'content']
|
|
|
code = content[u'code']
|
|
|
silent = content[u'silent']
|
|
|
except:
|
|
|
self.log.error("Got bad msg: ")
|
|
|
self.log.error("%s", parent)
|
|
|
return
|
|
|
|
|
|
shell = self.shell # we'll need this a lot here
|
|
|
|
|
|
# Replace raw_input. Note that is not sufficient to replace
|
|
|
# raw_input in the user namespace.
|
|
|
if content.get('allow_stdin', False):
|
|
|
raw_input = lambda prompt='': self._raw_input(prompt, ident, parent)
|
|
|
else:
|
|
|
raw_input = lambda prompt='' : self._no_raw_input()
|
|
|
|
|
|
if py3compat.PY3:
|
|
|
__builtin__.input = raw_input
|
|
|
else:
|
|
|
__builtin__.raw_input = raw_input
|
|
|
|
|
|
# Set the parent message of the display hook and out streams.
|
|
|
shell.displayhook.set_parent(parent)
|
|
|
shell.display_pub.set_parent(parent)
|
|
|
sys.stdout.set_parent(parent)
|
|
|
sys.stderr.set_parent(parent)
|
|
|
|
|
|
# Re-broadcast our input for the benefit of listening clients, and
|
|
|
# start computing output
|
|
|
if not silent:
|
|
|
self._publish_pyin(code, parent, shell.execution_count)
|
|
|
|
|
|
reply_content = {}
|
|
|
try:
|
|
|
if silent:
|
|
|
# run_code uses 'exec' mode, so no displayhook will fire, and it
|
|
|
# doesn't call logging or history manipulations. Print
|
|
|
# statements in that code will obviously still execute.
|
|
|
shell.run_code(code)
|
|
|
else:
|
|
|
# FIXME: the shell calls the exception handler itself.
|
|
|
shell.run_cell(code, store_history=True)
|
|
|
except:
|
|
|
status = u'error'
|
|
|
# FIXME: this code right now isn't being used yet by default,
|
|
|
# because the run_cell() call above directly fires off exception
|
|
|
# reporting. This code, therefore, is only active in the scenario
|
|
|
# where runlines itself has an unhandled exception. We need to
|
|
|
# uniformize this, for all exception construction to come from a
|
|
|
# single location in the codbase.
|
|
|
etype, evalue, tb = sys.exc_info()
|
|
|
tb_list = traceback.format_exception(etype, evalue, tb)
|
|
|
reply_content.update(shell._showtraceback(etype, evalue, tb_list))
|
|
|
else:
|
|
|
status = u'ok'
|
|
|
|
|
|
reply_content[u'status'] = status
|
|
|
|
|
|
# Return the execution counter so clients can display prompts
|
|
|
reply_content['execution_count'] = shell.execution_count -1
|
|
|
|
|
|
# FIXME - fish exception info out of shell, possibly left there by
|
|
|
# runlines. We'll need to clean up this logic later.
|
|
|
if shell._reply_content is not None:
|
|
|
reply_content.update(shell._reply_content)
|
|
|
# reset after use
|
|
|
shell._reply_content = None
|
|
|
|
|
|
# At this point, we can tell whether the main code execution succeeded
|
|
|
# or not. If it did, we proceed to evaluate user_variables/expressions
|
|
|
if reply_content['status'] == 'ok':
|
|
|
reply_content[u'user_variables'] = \
|
|
|
shell.user_variables(content[u'user_variables'])
|
|
|
reply_content[u'user_expressions'] = \
|
|
|
shell.user_expressions(content[u'user_expressions'])
|
|
|
else:
|
|
|
# If there was an error, don't even try to compute variables or
|
|
|
# expressions
|
|
|
reply_content[u'user_variables'] = {}
|
|
|
reply_content[u'user_expressions'] = {}
|
|
|
|
|
|
# Payloads should be retrieved regardless of outcome, so we can both
|
|
|
# recover partial output (that could have been generated early in a
|
|
|
# block, before an error) and clear the payload system always.
|
|
|
reply_content[u'payload'] = shell.payload_manager.read_payload()
|
|
|
# Be agressive about clearing the payload because we don't want
|
|
|
# it to sit in memory until the next execute_request comes in.
|
|
|
shell.payload_manager.clear_payload()
|
|
|
|
|
|
# Flush output before sending the reply.
|
|
|
sys.stdout.flush()
|
|
|
sys.stderr.flush()
|
|
|
# FIXME: on rare occasions, the flush doesn't seem to make it to the
|
|
|
# clients... This seems to mitigate the problem, but we definitely need
|
|
|
# to better understand what's going on.
|
|
|
if self._execute_sleep:
|
|
|
time.sleep(self._execute_sleep)
|
|
|
|
|
|
# Send the reply.
|
|
|
reply_content = json_clean(reply_content)
|
|
|
reply_msg = self.session.send(self.shell_socket, u'execute_reply',
|
|
|
reply_content, parent, ident=ident)
|
|
|
self.log.debug("%s", reply_msg)
|
|
|
|
|
|
if reply_msg['content']['status'] == u'error':
|
|
|
self._abort_queue()
|
|
|
|
|
|
self.session.send(self.iopub_socket,
|
|
|
u'status',
|
|
|
{u'execution_state':u'idle'},
|
|
|
parent=parent )
|
|
|
|
|
|
def complete_request(self, ident, parent):
|
|
|
txt, matches = self._complete(parent)
|
|
|
matches = {'matches' : matches,
|
|
|
'matched_text' : txt,
|
|
|
'status' : 'ok'}
|
|
|
matches = json_clean(matches)
|
|
|
completion_msg = self.session.send(self.shell_socket, 'complete_reply',
|
|
|
matches, parent, ident)
|
|
|
self.log.debug("%s", completion_msg)
|
|
|
|
|
|
def object_info_request(self, ident, parent):
|
|
|
content = parent['content']
|
|
|
object_info = self.shell.object_inspect(content['oname'],
|
|
|
detail_level = content.get('detail_level', 0)
|
|
|
)
|
|
|
# Before we send this object over, we scrub it for JSON usage
|
|
|
oinfo = json_clean(object_info)
|
|
|
msg = self.session.send(self.shell_socket, 'object_info_reply',
|
|
|
oinfo, parent, ident)
|
|
|
self.log.debug("%s", msg)
|
|
|
|
|
|
def history_request(self, ident, parent):
|
|
|
# We need to pull these out, as passing **kwargs doesn't work with
|
|
|
# unicode keys before Python 2.6.5.
|
|
|
hist_access_type = parent['content']['hist_access_type']
|
|
|
raw = parent['content']['raw']
|
|
|
output = parent['content']['output']
|
|
|
if hist_access_type == 'tail':
|
|
|
n = parent['content']['n']
|
|
|
hist = self.shell.history_manager.get_tail(n, raw=raw, output=output,
|
|
|
include_latest=True)
|
|
|
|
|
|
elif hist_access_type == 'range':
|
|
|
session = parent['content']['session']
|
|
|
start = parent['content']['start']
|
|
|
stop = parent['content']['stop']
|
|
|
hist = self.shell.history_manager.get_range(session, start, stop,
|
|
|
raw=raw, output=output)
|
|
|
|
|
|
elif hist_access_type == 'search':
|
|
|
pattern = parent['content']['pattern']
|
|
|
hist = self.shell.history_manager.search(pattern, raw=raw,
|
|
|
output=output)
|
|
|
|
|
|
else:
|
|
|
hist = []
|
|
|
hist = list(hist)
|
|
|
content = {'history' : hist}
|
|
|
content = json_clean(content)
|
|
|
msg = self.session.send(self.shell_socket, 'history_reply',
|
|
|
content, parent, ident)
|
|
|
self.log.debug("Sending history reply with %i entries", len(hist))
|
|
|
|
|
|
def connect_request(self, ident, parent):
|
|
|
if self._recorded_ports is not None:
|
|
|
content = self._recorded_ports.copy()
|
|
|
else:
|
|
|
content = {}
|
|
|
msg = self.session.send(self.shell_socket, 'connect_reply',
|
|
|
content, parent, ident)
|
|
|
self.log.debug("%s", msg)
|
|
|
|
|
|
def shutdown_request(self, ident, parent):
|
|
|
self.shell.exit_now = True
|
|
|
self._shutdown_message = self.session.msg(u'shutdown_reply',
|
|
|
parent['content'], parent)
|
|
|
sys.exit(0)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# Engine methods
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def apply_request(self, stream, ident, parent):
|
|
|
# flush previous reply, so this request won't block it
|
|
|
stream.flush(zmq.POLLOUT)
|
|
|
try:
|
|
|
content = parent[u'content']
|
|
|
bufs = parent[u'buffers']
|
|
|
msg_id = parent['header']['msg_id']
|
|
|
# bound = parent['header'].get('bound', False)
|
|
|
except:
|
|
|
self.log.error("Got bad msg: %s", parent, exc_info=True)
|
|
|
return
|
|
|
# pyin_msg = self.session.msg(u'pyin',{u'code':code}, parent=parent)
|
|
|
# self.iopub_stream.send(pyin_msg)
|
|
|
# self.session.send(self.iopub_stream, u'pyin', {u'code':code},parent=parent)
|
|
|
sub = {'dependencies_met' : True, 'engine' : self.ident,
|
|
|
'started': datetime.now()}
|
|
|
try:
|
|
|
# allow for not overriding displayhook
|
|
|
if hasattr(sys.displayhook, 'set_parent'):
|
|
|
sys.displayhook.set_parent(parent)
|
|
|
sys.stdout.set_parent(parent)
|
|
|
sys.stderr.set_parent(parent)
|
|
|
# exec "f(*args,**kwargs)" in self.user_ns, self.user_ns
|
|
|
working = self.user_ns
|
|
|
# suffix =
|
|
|
prefix = "_"+str(msg_id).replace("-","")+"_"
|
|
|
|
|
|
f,args,kwargs = unpack_apply_message(bufs, working, copy=False)
|
|
|
# if bound:
|
|
|
# bound_ns = Namespace(working)
|
|
|
# args = [bound_ns]+list(args)
|
|
|
|
|
|
fname = getattr(f, '__name__', 'f')
|
|
|
|
|
|
fname = prefix+"f"
|
|
|
argname = prefix+"args"
|
|
|
kwargname = prefix+"kwargs"
|
|
|
resultname = prefix+"result"
|
|
|
|
|
|
ns = { fname : f, argname : args, kwargname : kwargs , resultname : None }
|
|
|
# print ns
|
|
|
working.update(ns)
|
|
|
code = "%s=%s(*%s,**%s)"%(resultname, fname, argname, kwargname)
|
|
|
try:
|
|
|
exec code in working,working
|
|
|
result = working.get(resultname)
|
|
|
finally:
|
|
|
for key in ns.iterkeys():
|
|
|
working.pop(key)
|
|
|
# if bound:
|
|
|
# working.update(bound_ns)
|
|
|
|
|
|
packed_result,buf = serialize_object(result)
|
|
|
result_buf = [packed_result]+buf
|
|
|
except:
|
|
|
exc_content = self._wrap_exception('apply')
|
|
|
# exc_msg = self.session.msg(u'pyerr', exc_content, parent)
|
|
|
self.session.send(self.iopub_stream, u'pyerr', exc_content, parent=parent,
|
|
|
ident=asbytes('%s.pyerr'%self.prefix))
|
|
|
reply_content = exc_content
|
|
|
result_buf = []
|
|
|
|
|
|
if exc_content['ename'] == 'UnmetDependency':
|
|
|
sub['dependencies_met'] = False
|
|
|
else:
|
|
|
reply_content = {'status' : 'ok'}
|
|
|
|
|
|
# put 'ok'/'error' status in header, for scheduler introspection:
|
|
|
sub['status'] = reply_content['status']
|
|
|
|
|
|
# flush i/o
|
|
|
sys.stdout.flush()
|
|
|
sys.stderr.flush()
|
|
|
|
|
|
reply_msg = self.session.send(stream, u'apply_reply', reply_content,
|
|
|
parent=parent, ident=ident,buffers=result_buf, subheader=sub)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# Control messages
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def abort_queues(self):
|
|
|
for stream in self.shell_streams:
|
|
|
if stream:
|
|
|
self.abort_queue(stream)
|
|
|
|
|
|
def abort_queue(self, stream):
|
|
|
while True:
|
|
|
idents,msg = self.session.recv(stream, zmq.NOBLOCK, content=True)
|
|
|
if msg is None:
|
|
|
return
|
|
|
|
|
|
self.log.info("Aborting:")
|
|
|
self.log.info("%s", msg)
|
|
|
msg_type = msg['header']['msg_type']
|
|
|
reply_type = msg_type.split('_')[0] + '_reply'
|
|
|
# reply_msg = self.session.msg(reply_type, {'status' : 'aborted'}, msg)
|
|
|
# self.reply_socket.send(ident,zmq.SNDMORE)
|
|
|
# self.reply_socket.send_json(reply_msg)
|
|
|
reply_msg = self.session.send(stream, reply_type,
|
|
|
content={'status' : 'aborted'}, parent=msg, ident=idents)
|
|
|
self.log.debug("%s", reply_msg)
|
|
|
# We need to wait a bit for requests to come in. This can probably
|
|
|
# be set shorter for true asynchronous clients.
|
|
|
time.sleep(0.05)
|
|
|
|
|
|
def abort_request(self, stream, ident, parent):
|
|
|
"""abort a specifig msg by id"""
|
|
|
msg_ids = parent['content'].get('msg_ids', None)
|
|
|
if isinstance(msg_ids, basestring):
|
|
|
msg_ids = [msg_ids]
|
|
|
if not msg_ids:
|
|
|
self.abort_queues()
|
|
|
for mid in msg_ids:
|
|
|
self.aborted.add(str(mid))
|
|
|
|
|
|
content = dict(status='ok')
|
|
|
reply_msg = self.session.send(stream, 'abort_reply', content=content,
|
|
|
parent=parent, ident=ident)
|
|
|
self.log.debug("%s", reply_msg)
|
|
|
|
|
|
def clear_request(self, stream, idents, parent):
|
|
|
"""Clear our namespace."""
|
|
|
self.user_ns = {}
|
|
|
msg = self.session.send(stream, 'clear_reply', ident=idents, parent=parent,
|
|
|
content = dict(status='ok'))
|
|
|
self._initial_exec_lines()
|
|
|
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# Protected interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _abort_queue(self):
|
|
|
while True:
|
|
|
try:
|
|
|
ident,msg = self.session.recv(self.shell_socket, zmq.NOBLOCK)
|
|
|
except Exception:
|
|
|
self.log.warn("Invalid Message:", exc_info=True)
|
|
|
continue
|
|
|
if msg is None:
|
|
|
break
|
|
|
else:
|
|
|
assert ident is not None, \
|
|
|
"Unexpected missing message part."
|
|
|
|
|
|
self.log.debug("Aborting:\n%s", msg)
|
|
|
msg_type = msg['header']['msg_type']
|
|
|
reply_type = msg_type.split('_')[0] + '_reply'
|
|
|
reply_msg = self.session.send(self.shell_socket, reply_type,
|
|
|
{'status' : 'aborted'}, msg, ident=ident)
|
|
|
self.log.debug("%s", reply_msg)
|
|
|
# We need to wait a bit for requests to come in. This can probably
|
|
|
# be set shorter for true asynchronous clients.
|
|
|
time.sleep(0.1)
|
|
|
|
|
|
def _no_raw_input(self):
|
|
|
"""Raise StdinNotImplentedError if active frontend doesn't support
|
|
|
stdin."""
|
|
|
raise StdinNotImplementedError("raw_input was called, but this "
|
|
|
"frontend does not support stdin.")
|
|
|
|
|
|
def _raw_input(self, prompt, ident, parent):
|
|
|
# Flush output before making the request.
|
|
|
sys.stderr.flush()
|
|
|
sys.stdout.flush()
|
|
|
|
|
|
# Send the input request.
|
|
|
content = json_clean(dict(prompt=prompt))
|
|
|
self.session.send(self.stdin_socket, u'input_request', content, parent,
|
|
|
ident=ident)
|
|
|
|
|
|
# Await a response.
|
|
|
while True:
|
|
|
try:
|
|
|
ident, reply = self.session.recv(self.stdin_socket, 0)
|
|
|
except Exception:
|
|
|
self.log.warn("Invalid Message:", exc_info=True)
|
|
|
else:
|
|
|
break
|
|
|
try:
|
|
|
value = reply['content']['value']
|
|
|
except:
|
|
|
self.log.error("Got bad raw_input reply: ")
|
|
|
self.log.error("%s", parent)
|
|
|
value = ''
|
|
|
if value == '\x04':
|
|
|
# EOF
|
|
|
raise EOFError
|
|
|
return value
|
|
|
|
|
|
def _complete(self, msg):
|
|
|
c = msg['content']
|
|
|
try:
|
|
|
cpos = int(c['cursor_pos'])
|
|
|
except:
|
|
|
# If we don't get something that we can convert to an integer, at
|
|
|
# least attempt the completion guessing the cursor is at the end of
|
|
|
# the text, if there's any, and otherwise of the line
|
|
|
cpos = len(c['text'])
|
|
|
if cpos==0:
|
|
|
cpos = len(c['line'])
|
|
|
return self.shell.complete(c['text'], c['line'], cpos)
|
|
|
|
|
|
def _object_info(self, context):
|
|
|
symbol, leftover = self._symbol_from_context(context)
|
|
|
if symbol is not None and not leftover:
|
|
|
doc = getattr(symbol, '__doc__', '')
|
|
|
else:
|
|
|
doc = ''
|
|
|
object_info = dict(docstring = doc)
|
|
|
return object_info
|
|
|
|
|
|
def _symbol_from_context(self, context):
|
|
|
if not context:
|
|
|
return None, context
|
|
|
|
|
|
base_symbol_string = context[0]
|
|
|
symbol = self.shell.user_ns.get(base_symbol_string, None)
|
|
|
if symbol is None:
|
|
|
symbol = __builtin__.__dict__.get(base_symbol_string, None)
|
|
|
if symbol is None:
|
|
|
return None, context
|
|
|
|
|
|
context = context[1:]
|
|
|
for i, name in enumerate(context):
|
|
|
new_symbol = getattr(symbol, name, None)
|
|
|
if new_symbol is None:
|
|
|
return symbol, context[i:]
|
|
|
else:
|
|
|
symbol = new_symbol
|
|
|
|
|
|
return symbol, []
|
|
|
|
|
|
def _at_shutdown(self):
|
|
|
"""Actions taken at shutdown by the kernel, called by python's atexit.
|
|
|
"""
|
|
|
# io.rprint("Kernel at_shutdown") # dbg
|
|
|
if self._shutdown_message is not None:
|
|
|
self.session.send(self.shell_socket, self._shutdown_message)
|
|
|
self.session.send(self.iopub_socket, self._shutdown_message)
|
|
|
self.log.debug("%s", self._shutdown_message)
|
|
|
# A very short sleep to give zmq time to flush its message buffers
|
|
|
# before Python truly shuts down.
|
|
|
time.sleep(0.01)
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Aliases and Flags for the IPKernelApp
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
flags = dict(kernel_flags)
|
|
|
flags.update(shell_flags)
|
|
|
|
|
|
addflag = lambda *args: flags.update(boolean_flag(*args))
|
|
|
|
|
|
flags['pylab'] = (
|
|
|
{'IPKernelApp' : {'pylab' : 'auto'}},
|
|
|
"""Pre-load matplotlib and numpy for interactive use with
|
|
|
the default matplotlib backend."""
|
|
|
)
|
|
|
|
|
|
aliases = dict(kernel_aliases)
|
|
|
aliases.update(shell_aliases)
|
|
|
|
|
|
# it's possible we don't want short aliases for *all* of these:
|
|
|
aliases.update(dict(
|
|
|
pylab='IPKernelApp.pylab',
|
|
|
))
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# The IPKernelApp class
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class IPKernelApp(KernelApp, InteractiveShellApp):
|
|
|
name = 'ipkernel'
|
|
|
|
|
|
aliases = Dict(aliases)
|
|
|
flags = Dict(flags)
|
|
|
classes = [Kernel, ZMQInteractiveShell, ProfileDir, Session]
|
|
|
|
|
|
# configurables
|
|
|
pylab = CaselessStrEnum(['tk', 'qt', 'wx', 'gtk', 'osx', 'inline', 'auto'],
|
|
|
config=True,
|
|
|
help="""Pre-load matplotlib and numpy for interactive use,
|
|
|
selecting a particular matplotlib backend and loop integration.
|
|
|
"""
|
|
|
)
|
|
|
|
|
|
@catch_config_error
|
|
|
def initialize(self, argv=None):
|
|
|
super(IPKernelApp, self).initialize(argv)
|
|
|
self.init_path()
|
|
|
self.init_shell()
|
|
|
self.init_extensions()
|
|
|
self.init_code()
|
|
|
|
|
|
def init_kernel(self):
|
|
|
|
|
|
kernel = Kernel(config=self.config, session=self.session,
|
|
|
shell_socket=self.shell_socket,
|
|
|
iopub_socket=self.iopub_socket,
|
|
|
stdin_socket=self.stdin_socket,
|
|
|
log=self.log,
|
|
|
profile_dir=self.profile_dir,
|
|
|
)
|
|
|
self.kernel = kernel
|
|
|
kernel.record_ports(self.ports)
|
|
|
shell = kernel.shell
|
|
|
if self.pylab:
|
|
|
try:
|
|
|
gui, backend = pylabtools.find_gui_and_backend(self.pylab)
|
|
|
shell.enable_pylab(gui, import_all=self.pylab_import_all)
|
|
|
except Exception:
|
|
|
self.log.error("Pylab initialization failed", exc_info=True)
|
|
|
# print exception straight to stdout, because normally
|
|
|
# _showtraceback associates the reply with an execution,
|
|
|
# which means frontends will never draw it, as this exception
|
|
|
# is not associated with any execute request.
|
|
|
|
|
|
# replace pyerr-sending traceback with stdout
|
|
|
_showtraceback = shell._showtraceback
|
|
|
def print_tb(etype, evalue, stb):
|
|
|
print ("Error initializing pylab, pylab mode will not "
|
|
|
"be active", file=io.stderr)
|
|
|
print (shell.InteractiveTB.stb2text(stb), file=io.stdout)
|
|
|
shell._showtraceback = print_tb
|
|
|
|
|
|
# send the traceback over stdout
|
|
|
shell.showtraceback(tb_offset=0)
|
|
|
|
|
|
# restore proper _showtraceback method
|
|
|
shell._showtraceback = _showtraceback
|
|
|
|
|
|
|
|
|
def init_shell(self):
|
|
|
self.shell = self.kernel.shell
|
|
|
self.shell.configurables.append(self)
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Kernel main and launch functions
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
def launch_kernel(*args, **kwargs):
|
|
|
"""Launches a localhost IPython kernel, binding to the specified ports.
|
|
|
|
|
|
This function simply calls entry_point.base_launch_kernel with the right
|
|
|
first command to start an ipkernel. See base_launch_kernel for arguments.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
A tuple of form:
|
|
|
(kernel_process, shell_port, iopub_port, stdin_port, hb_port)
|
|
|
where kernel_process is a Popen object and the ports are integers.
|
|
|
"""
|
|
|
return base_launch_kernel('from IPython.zmq.ipkernel import main; main()',
|
|
|
*args, **kwargs)
|
|
|
|
|
|
|
|
|
def embed_kernel(module=None, local_ns=None, **kwargs):
|
|
|
"""Embed and start an IPython kernel in a given scope.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
module : ModuleType, optional
|
|
|
The module to load into IPython globals (default: caller)
|
|
|
local_ns : dict, optional
|
|
|
The namespace to load into IPython user namespace (default: caller)
|
|
|
|
|
|
kwargs : various, optional
|
|
|
Further keyword args are relayed to the KernelApp constructor,
|
|
|
allowing configuration of the Kernel. Will only have an effect
|
|
|
on the first embed_kernel call for a given process.
|
|
|
|
|
|
"""
|
|
|
# get the app if it exists, or set it up if it doesn't
|
|
|
if IPKernelApp.initialized():
|
|
|
app = IPKernelApp.instance()
|
|
|
else:
|
|
|
app = IPKernelApp.instance(**kwargs)
|
|
|
app.initialize([])
|
|
|
|
|
|
# load the calling scope if not given
|
|
|
(caller_module, caller_locals) = extract_module_locals(1)
|
|
|
if module is None:
|
|
|
module = caller_module
|
|
|
if local_ns is None:
|
|
|
local_ns = caller_locals
|
|
|
|
|
|
app.kernel.user_module = module
|
|
|
app.kernel.user_ns = local_ns
|
|
|
app.start()
|
|
|
|
|
|
def main():
|
|
|
"""Run an IPKernel as an application"""
|
|
|
app = IPKernelApp.instance()
|
|
|
app.initialize()
|
|
|
app.start()
|
|
|
|
|
|
|
|
|
if __name__ == '__main__':
|
|
|
main()
|
|
|
|
