/usr/lib/python3/dist-packages/ipykernel/displayhook.py is in python3-ipykernel 4.5.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | """Replacements for sys.displayhook that publish over ZMQ."""
# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.
import sys
from IPython.core.displayhook import DisplayHook
from ipykernel.jsonutil import encode_images
from ipython_genutils.py3compat import builtin_mod
from traitlets import Instance, Dict, Any
from jupyter_client.session import extract_header, Session
class ZMQDisplayHook(object):
"""A simple displayhook that publishes the object's repr over a ZeroMQ
socket."""
topic = b'execute_result'
def __init__(self, session, pub_socket):
self.session = session
self.pub_socket = pub_socket
self.parent_header = {}
def get_execution_count(self):
"""This method is replaced in kernelapp"""
return 0
def __call__(self, obj):
if obj is None:
return
builtin_mod._ = obj
sys.stdout.flush()
sys.stderr.flush()
contents = {u'execution_count': self.get_execution_count(),
u'data': {'text/plain': repr(obj)},
u'metadata': {}}
self.session.send(self.pub_socket, u'execute_result', contents,
parent=self.parent_header, ident=self.topic)
def set_parent(self, parent):
self.parent_header = extract_header(parent)
class ZMQShellDisplayHook(DisplayHook):
"""A displayhook subclass that publishes data using ZeroMQ. This is intended
to work with an InteractiveShell instance. It sends a dict of different
representations of the object."""
topic=None
session = Instance(Session, allow_none=True)
pub_socket = Any(allow_none=True)
parent_header = Dict({})
def set_parent(self, parent):
"""Set the parent for outbound messages."""
self.parent_header = extract_header(parent)
def start_displayhook(self):
self.msg = self.session.msg(u'execute_result', {
'data': {},
'metadata': {},
}, parent=self.parent_header)
def write_output_prompt(self):
"""Write the output prompt."""
self.msg['content']['execution_count'] = self.prompt_count
def write_format_data(self, format_dict, md_dict=None):
self.msg['content']['data'] = encode_images(format_dict)
self.msg['content']['metadata'] = md_dict
def finish_displayhook(self):
"""Finish up all displayhook activities."""
sys.stdout.flush()
sys.stderr.flush()
if self.msg['content']['data']:
self.session.send(self.pub_socket, self.msg, ident=self.topic)
self.msg = None
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