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""" A minimal application using the Qt console-style IPython frontend.
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This is not a complete console app, as subprocess will not be able to receive
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input, there is no real readline support, among other limitations.
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Authors:
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* Evan Patterson
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* Min RK
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* Erik Tollerud
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* Fernando Perez
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* Bussonnier Matthias
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* Thomas Kluyver
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"""
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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# stdlib imports
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import json
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import os
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import signal
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import sys
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import uuid
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# System library imports
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from IPython.external.qt import QtGui
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# Local imports
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from IPython.config.application import boolean_flag
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from IPython.core.application import BaseIPythonApplication
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from IPython.core.profiledir import ProfileDir
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from IPython.lib.kernel import tunnel_to_kernel, find_connection_file
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from IPython.frontend.qt.console.frontend_widget import FrontendWidget
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from IPython.frontend.qt.console.ipython_widget import IPythonWidget
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from IPython.frontend.qt.console.rich_ipython_widget import RichIPythonWidget
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from IPython.frontend.qt.console import styles
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from IPython.frontend.qt.console.mainwindow import MainWindow
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from IPython.frontend.qt.kernelmanager import QtKernelManager
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from IPython.utils.path import filefind
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from IPython.utils.py3compat import str_to_bytes
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from IPython.utils.traitlets import (
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Dict, List, Unicode, Int, CaselessStrEnum, CBool, Any
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)
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from IPython.zmq.ipkernel import (
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flags as ipkernel_flags,
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aliases as ipkernel_aliases,
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IPKernelApp
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)
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from IPython.zmq.session import Session, default_secure
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from IPython.zmq.zmqshell import ZMQInteractiveShell
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#-----------------------------------------------------------------------------
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# Network Constants
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#-----------------------------------------------------------------------------
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from IPython.utils.localinterfaces import LOCALHOST, LOCAL_IPS
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#-----------------------------------------------------------------------------
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# Globals
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#-----------------------------------------------------------------------------
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_examples = """
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ipython qtconsole # start the qtconsole
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ipython qtconsole --pylab=inline # start with pylab in inline plotting mode
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"""
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#-----------------------------------------------------------------------------
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# Aliases and Flags
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#-----------------------------------------------------------------------------
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flags = dict(ipkernel_flags)
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qt_flags = {
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'existing' : ({'IPythonQtConsoleApp' : {'existing' : 'kernel*.json'}},
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"Connect to an existing kernel. If no argument specified, guess most recent"),
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'pure' : ({'IPythonQtConsoleApp' : {'pure' : True}},
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"Use a pure Python kernel instead of an IPython kernel."),
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'plain' : ({'ConsoleWidget' : {'kind' : 'plain'}},
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"Disable rich text support."),
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}
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qt_flags.update(boolean_flag(
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'gui-completion', 'ConsoleWidget.gui_completion',
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"use a GUI widget for tab completion",
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"use plaintext output for completion"
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))
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qt_flags.update(boolean_flag(
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'confirm-exit', 'IPythonQtConsoleApp.confirm_exit',
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"""Set to display confirmation dialog on exit. You can always use 'exit' or 'quit',
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to force a direct exit without any confirmation.
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""",
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"""Don't prompt the user when exiting. This will terminate the kernel
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if it is owned by the frontend, and leave it alive if it is external.
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"""
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))
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flags.update(qt_flags)
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aliases = dict(ipkernel_aliases)
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qt_aliases = dict(
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hb = 'IPythonQtConsoleApp.hb_port',
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shell = 'IPythonQtConsoleApp.shell_port',
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iopub = 'IPythonQtConsoleApp.iopub_port',
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stdin = 'IPythonQtConsoleApp.stdin_port',
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ip = 'IPythonQtConsoleApp.ip',
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existing = 'IPythonQtConsoleApp.existing',
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f = 'IPythonQtConsoleApp.connection_file',
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style = 'IPythonWidget.syntax_style',
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stylesheet = 'IPythonQtConsoleApp.stylesheet',
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colors = 'ZMQInteractiveShell.colors',
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editor = 'IPythonWidget.editor',
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paging = 'ConsoleWidget.paging',
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ssh = 'IPythonQtConsoleApp.sshserver',
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)
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aliases.update(qt_aliases)
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#-----------------------------------------------------------------------------
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# Classes
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# IPythonQtConsole
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#-----------------------------------------------------------------------------
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class IPythonQtConsoleApp(BaseIPythonApplication):
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name = 'ipython-qtconsole'
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default_config_file_name='ipython_config.py'
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description = """
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The IPython QtConsole.
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This launches a Console-style application using Qt. It is not a full
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console, in that launched terminal subprocesses will not be able to accept
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input.
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The QtConsole supports various extra features beyond the Terminal IPython
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shell, such as inline plotting with matplotlib, via:
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ipython qtconsole --pylab=inline
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as well as saving your session as HTML, and printing the output.
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"""
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examples = _examples
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classes = [IPKernelApp, IPythonWidget, ZMQInteractiveShell, ProfileDir, Session]
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flags = Dict(flags)
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aliases = Dict(aliases)
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kernel_argv = List(Unicode)
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# create requested profiles by default, if they don't exist:
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auto_create = CBool(True)
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# connection info:
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ip = Unicode(LOCALHOST, config=True,
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help="""Set the kernel\'s IP address [default localhost].
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If the IP address is something other than localhost, then
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Consoles on other machines will be able to connect
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to the Kernel, so be careful!"""
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)
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sshserver = Unicode('', config=True,
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help="""The SSH server to use to connect to the kernel.""")
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sshkey = Unicode('', config=True,
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help="""Path to the ssh key to use for logging in to the ssh server.""")
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hb_port = Int(0, config=True,
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help="set the heartbeat port [default: random]")
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shell_port = Int(0, config=True,
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help="set the shell (XREP) port [default: random]")
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iopub_port = Int(0, config=True,
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help="set the iopub (PUB) port [default: random]")
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stdin_port = Int(0, config=True,
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help="set the stdin (XREQ) port [default: random]")
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connection_file = Unicode('', config=True,
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help="""JSON file in which to store connection info [default: kernel-<pid>.json]
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This file will contain the IP, ports, and authentication key needed to connect
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clients to this kernel. By default, this file will be created in the security-dir
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of the current profile, but can be specified by absolute path.
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""")
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def _connection_file_default(self):
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return 'kernel-%i.json' % os.getpid()
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existing = Unicode('', config=True,
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help="""Connect to an already running kernel""")
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stylesheet = Unicode('', config=True,
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help="path to a custom CSS stylesheet")
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pure = CBool(False, config=True,
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help="Use a pure Python kernel instead of an IPython kernel.")
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plain = CBool(False, config=True,
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help="Use a plaintext widget instead of rich text (plain can't print/save).")
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def _pure_changed(self, name, old, new):
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kind = 'plain' if self.plain else 'rich'
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self.config.ConsoleWidget.kind = kind
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if self.pure:
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self.widget_factory = FrontendWidget
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elif self.plain:
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self.widget_factory = IPythonWidget
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else:
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self.widget_factory = RichIPythonWidget
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_plain_changed = _pure_changed
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confirm_exit = CBool(True, config=True,
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help="""
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Set to display confirmation dialog on exit. You can always use 'exit' or 'quit',
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to force a direct exit without any confirmation.""",
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)
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# the factory for creating a widget
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widget_factory = Any(RichIPythonWidget)
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def parse_command_line(self, argv=None):
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super(IPythonQtConsoleApp, self).parse_command_line(argv)
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if argv is None:
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argv = sys.argv[1:]
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self.kernel_argv = list(argv) # copy
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# kernel should inherit default config file from frontend
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self.kernel_argv.append("--KernelApp.parent_appname='%s'"%self.name)
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# Scrub frontend-specific flags
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for a in argv:
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if a.startswith('-') and a.lstrip('-') in qt_flags:
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self.kernel_argv.remove(a)
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swallow_next = False
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for a in argv:
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if swallow_next:
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self.kernel_argv.remove(a)
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swallow_next = False
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continue
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if a.startswith('-'):
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split = a.lstrip('-').split('=')
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alias = split[0]
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if alias in qt_aliases:
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self.kernel_argv.remove(a)
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if len(split) == 1:
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# alias passed with arg via space
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swallow_next = True
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def init_connection_file(self):
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"""find the connection file, and load the info if found.
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The current working directory and the current profile's security
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directory will be searched for the file if it is not given by
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absolute path.
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When attempting to connect to an existing kernel and the `--existing`
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argument does not match an existing file, it will be interpreted as a
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fileglob, and the matching file in the current profile's security dir
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with the latest access time will be used.
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"""
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if self.existing:
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try:
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cf = find_connection_file(self.existing)
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except Exception:
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self.log.critical("Could not find existing kernel connection file %s", self.existing)
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self.exit(1)
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self.log.info("Connecting to existing kernel: %s" % cf)
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self.connection_file = cf
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# should load_connection_file only be used for existing?
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# as it is now, this allows reusing ports if an existing
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# file is requested
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try:
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self.load_connection_file()
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except Exception:
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self.log.error("Failed to load connection file: %r", self.connection_file, exc_info=True)
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self.exit(1)
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def load_connection_file(self):
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"""load ip/port/hmac config from JSON connection file"""
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# this is identical to KernelApp.load_connection_file
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# perhaps it can be centralized somewhere?
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try:
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fname = filefind(self.connection_file, ['.', self.profile_dir.security_dir])
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except IOError:
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self.log.debug("Connection File not found: %s", self.connection_file)
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return
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self.log.debug(u"Loading connection file %s", fname)
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with open(fname) as f:
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s = f.read()
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cfg = json.loads(s)
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if self.ip == LOCALHOST and 'ip' in cfg:
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# not overridden by config or cl_args
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self.ip = cfg['ip']
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for channel in ('hb', 'shell', 'iopub', 'stdin'):
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name = channel + '_port'
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if getattr(self, name) == 0 and name in cfg:
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# not overridden by config or cl_args
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setattr(self, name, cfg[name])
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if 'key' in cfg:
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self.config.Session.key = str_to_bytes(cfg['key'])
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def init_ssh(self):
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"""set up ssh tunnels, if needed."""
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if not self.sshserver and not self.sshkey:
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return
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if self.sshkey and not self.sshserver:
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# specifying just the key implies that we are connecting directly
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self.sshserver = self.ip
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self.ip = LOCALHOST
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# build connection dict for tunnels:
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info = dict(ip=self.ip,
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shell_port=self.shell_port,
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iopub_port=self.iopub_port,
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stdin_port=self.stdin_port,
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hb_port=self.hb_port
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)
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self.log.info("Forwarding connections to %s via %s"%(self.ip, self.sshserver))
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# tunnels return a new set of ports, which will be on localhost:
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self.ip = LOCALHOST
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try:
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newports = tunnel_to_kernel(info, self.sshserver, self.sshkey)
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except:
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# even catch KeyboardInterrupt
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self.log.error("Could not setup tunnels", exc_info=True)
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self.exit(1)
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self.shell_port, self.iopub_port, self.stdin_port, self.hb_port = newports
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cf = self.connection_file
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base,ext = os.path.splitext(cf)
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base = os.path.basename(base)
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self.connection_file = os.path.basename(base)+'-ssh'+ext
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self.log.critical("To connect another client via this tunnel, use:")
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self.log.critical("--existing %s" % self.connection_file)
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def _new_connection_file(self):
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return os.path.join(self.profile_dir.security_dir, 'kernel-%s.json' % uuid.uuid4())
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def init_kernel_manager(self):
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# Don't let Qt or ZMQ swallow KeyboardInterupts.
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signal.signal(signal.SIGINT, signal.SIG_DFL)
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sec = self.profile_dir.security_dir
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try:
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cf = filefind(self.connection_file, ['.', sec])
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except IOError:
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# file might not exist
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if self.connection_file == os.path.basename(self.connection_file):
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# just shortname, put it in security dir
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cf = os.path.join(sec, self.connection_file)
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else:
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cf = self.connection_file
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# Create a KernelManager and start a kernel.
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self.kernel_manager = QtKernelManager(
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ip=self.ip,
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shell_port=self.shell_port,
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iopub_port=self.iopub_port,
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stdin_port=self.stdin_port,
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hb_port=self.hb_port,
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connection_file=cf,
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config=self.config,
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)
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# start the kernel
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if not self.existing:
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kwargs = dict(ipython=not self.pure)
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kwargs['extra_arguments'] = self.kernel_argv
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self.kernel_manager.start_kernel(**kwargs)
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elif self.sshserver:
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# ssh, write new connection file
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self.kernel_manager.write_connection_file()
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|
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self.kernel_manager.start_channels()
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|
|
|
|
def new_frontend_master(self):
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|
|
""" Create and return new frontend attached to new kernel, launched on localhost.
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"""
|
|
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ip = self.ip if self.ip in LOCAL_IPS else LOCALHOST
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|
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kernel_manager = QtKernelManager(
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|
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ip=ip,
|
|
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connection_file=self._new_connection_file(),
|
|
|
config=self.config,
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)
|
|
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# start the kernel
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|
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kwargs = dict(ipython=not self.pure)
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|
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kwargs['extra_arguments'] = self.kernel_argv
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|
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kernel_manager.start_kernel(**kwargs)
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|
|
kernel_manager.start_channels()
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|
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widget = self.widget_factory(config=self.config,
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|
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local_kernel=True)
|
|
|
widget.kernel_manager = kernel_manager
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|
|
widget._existing = False
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|
|
widget._may_close = True
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|
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widget._confirm_exit = self.confirm_exit
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|
|
return widget
|
|
|
|
|
|
def new_frontend_slave(self, current_widget):
|
|
|
"""Create and return a new frontend attached to an existing kernel.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
current_widget : IPythonWidget
|
|
|
The IPythonWidget whose kernel this frontend is to share
|
|
|
"""
|
|
|
kernel_manager = QtKernelManager(
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|
|
connection_file=current_widget.kernel_manager.connection_file,
|
|
|
config = self.config,
|
|
|
)
|
|
|
kernel_manager.load_connection_file()
|
|
|
kernel_manager.start_channels()
|
|
|
widget = self.widget_factory(config=self.config,
|
|
|
local_kernel=False)
|
|
|
widget._existing = True
|
|
|
widget._may_close = False
|
|
|
widget._confirm_exit = False
|
|
|
widget.kernel_manager = kernel_manager
|
|
|
return widget
|
|
|
|
|
|
def init_qt_elements(self):
|
|
|
# Create the widget.
|
|
|
self.app = QtGui.QApplication([])
|
|
|
|
|
|
base_path = os.path.abspath(os.path.dirname(__file__))
|
|
|
icon_path = os.path.join(base_path, 'resources', 'icon', 'IPythonConsole.svg')
|
|
|
self.app.icon = QtGui.QIcon(icon_path)
|
|
|
QtGui.QApplication.setWindowIcon(self.app.icon)
|
|
|
|
|
|
local_kernel = (not self.existing) or self.ip in LOCAL_IPS
|
|
|
self.widget = self.widget_factory(config=self.config,
|
|
|
local_kernel=local_kernel)
|
|
|
self.widget._existing = self.existing
|
|
|
self.widget._may_close = not self.existing
|
|
|
self.widget._confirm_exit = self.confirm_exit
|
|
|
|
|
|
self.widget.kernel_manager = self.kernel_manager
|
|
|
self.window = MainWindow(self.app,
|
|
|
confirm_exit=self.confirm_exit,
|
|
|
new_frontend_factory=self.new_frontend_master,
|
|
|
slave_frontend_factory=self.new_frontend_slave,
|
|
|
)
|
|
|
self.window.log = self.log
|
|
|
self.window.add_tab_with_frontend(self.widget)
|
|
|
self.window.init_menu_bar()
|
|
|
self.window.setWindowTitle('Python' if self.pure else 'IPython')
|
|
|
|
|
|
def init_colors(self):
|
|
|
"""Configure the coloring of the widget"""
|
|
|
# Note: This will be dramatically simplified when colors
|
|
|
# are removed from the backend.
|
|
|
|
|
|
if self.pure:
|
|
|
# only IPythonWidget supports styling
|
|
|
return
|
|
|
|
|
|
# parse the colors arg down to current known labels
|
|
|
try:
|
|
|
colors = self.config.ZMQInteractiveShell.colors
|
|
|
except AttributeError:
|
|
|
colors = None
|
|
|
try:
|
|
|
style = self.config.IPythonWidget.colors
|
|
|
except AttributeError:
|
|
|
style = None
|
|
|
|
|
|
# find the value for colors:
|
|
|
if colors:
|
|
|
colors=colors.lower()
|
|
|
if colors in ('lightbg', 'light'):
|
|
|
colors='lightbg'
|
|
|
elif colors in ('dark', 'linux'):
|
|
|
colors='linux'
|
|
|
else:
|
|
|
colors='nocolor'
|
|
|
elif style:
|
|
|
if style=='bw':
|
|
|
colors='nocolor'
|
|
|
elif styles.dark_style(style):
|
|
|
colors='linux'
|
|
|
else:
|
|
|
colors='lightbg'
|
|
|
else:
|
|
|
colors=None
|
|
|
|
|
|
# Configure the style.
|
|
|
widget = self.widget
|
|
|
if style:
|
|
|
widget.style_sheet = styles.sheet_from_template(style, colors)
|
|
|
widget.syntax_style = style
|
|
|
widget._syntax_style_changed()
|
|
|
widget._style_sheet_changed()
|
|
|
elif colors:
|
|
|
# use a default style
|
|
|
widget.set_default_style(colors=colors)
|
|
|
else:
|
|
|
# this is redundant for now, but allows the widget's
|
|
|
# defaults to change
|
|
|
widget.set_default_style()
|
|
|
|
|
|
if self.stylesheet:
|
|
|
# we got an expicit stylesheet
|
|
|
if os.path.isfile(self.stylesheet):
|
|
|
with open(self.stylesheet) as f:
|
|
|
sheet = f.read()
|
|
|
widget.style_sheet = sheet
|
|
|
widget._style_sheet_changed()
|
|
|
else:
|
|
|
raise IOError("Stylesheet %r not found."%self.stylesheet)
|
|
|
|
|
|
def initialize(self, argv=None):
|
|
|
super(IPythonQtConsoleApp, self).initialize(argv)
|
|
|
self.init_connection_file()
|
|
|
default_secure(self.config)
|
|
|
self.init_ssh()
|
|
|
self.init_kernel_manager()
|
|
|
self.init_qt_elements()
|
|
|
self.init_colors()
|
|
|
|
|
|
def start(self):
|
|
|
|
|
|
# draw the window
|
|
|
self.window.show()
|
|
|
|
|
|
# Start the application main loop.
|
|
|
self.app.exec_()
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Main entry point
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
def main():
|
|
|
app = IPythonQtConsoleApp()
|
|
|
app.initialize()
|
|
|
app.start()
|
|
|
|
|
|
|
|
|
if __name__ == '__main__':
|
|
|
main()
|
|
|
|
