Source code for

# Copyright (c) 2012 - 2022, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
# The full license is in the file LICENSE.txt, distributed with this software.


# Boilerplate
from __future__ import annotations

import logging # isort:skip
log = logging.getLogger(__name__)

# Imports

# Standard library imports
from typing import TYPE_CHECKING, Any

# External imports
from typing_extensions import TypeGuard

# Bokeh imports
from ..models.layouts import LayoutDOM
from ..util.browser import NEW_PARAM, get_browser_controller
from .notebook import run_notebook_hook
from .saving import save
from .state import curstate

    from ..application.application import Application
    from ..application.handlers.function import ModifyDoc
    from ..util.browser import BrowserLike, BrowserTarget
    from .notebook import CommsHandle
    from .state import State

# Globals and constants

__all__ = (

# General API

[docs]def show(obj: LayoutDOM | Application | ModifyDoc, browser: str | None = None, new: BrowserTarget = "tab", notebook_handle: bool = False, notebook_url: str = "localhost:8888", **kwargs: Any) -> CommsHandle | None: ''' Immediately display a Bokeh object or application. :func:`show` may be called multiple times in a single Jupyter notebook cell to display multiple objects. The objects are displayed in order. Args: obj (LayoutDOM or Application or callable) : A Bokeh object to display. Bokeh plots, widgets, layouts (i.e. rows and columns) may be passed to ``show`` in order to display them. If |output_file| has been called, the output will be to an HTML file, which is also opened in a new browser window or tab. If |output_notebook| has been called in a Jupyter notebook, the output will be inline in the associated notebook output cell. In a Jupyter notebook, a Bokeh application or callable may also be passed. A callable will be turned into an Application using a ``FunctionHandler``. The application will be run and displayed inline in the associated notebook output cell. browser (str, optional) : Specify the browser to use to open output files(default: None) For file output, the **browser** argument allows for specifying which browser to display in, e.g. "safari", "firefox", "opera", "windows-default". Not all platforms may support this option, see the documentation for the standard library :doc:`webbrowser <python:library/webbrowser>` module for more information new (str, optional) : Specify the browser mode to use for output files (default: "tab") For file output, opens or raises the browser window showing the current output file. If **new** is 'tab', then opens a new tab. If **new** is 'window', then opens a new window. notebook_handle (bool, optional) : Whether to create a notebook interaction handle (default: False) For notebook output, toggles whether a handle which can be used with ``push_notebook`` is returned. Note that notebook handles only apply to standalone plots, layouts, etc. They do not apply when showing Applications in the notebook. notebook_url (URL, optional) : Location of the Jupyter notebook page (default: "localhost:8888") When showing Bokeh applications, the Bokeh server must be explicitly configured to allow connections originating from different URLs. This parameter defaults to the standard notebook host and port. If you are running on a different location, you will need to supply this value for the application to display properly. If no protocol is supplied in the URL, e.g. if it is of the form "localhost:8888", then "http" will be used. ``notebook_url`` can also be a function that takes one int for the bound server port. If the port is provided, the function needs to generate the full public URL to the bokeh server. If None is passed, the function is to generate the origin URL. Some parameters are only useful when certain output modes are active: * The ``browser`` and ``new`` parameters only apply when |output_file| is active. * The ``notebook_handle`` parameter only applies when |output_notebook| is active, and non-Application objects are being shown. It is only supported in Jupyter notebook and raises an exception for other notebook types when it is True. * The ``notebook_url`` parameter only applies when showing Bokeh Applications in a Jupyter notebook. * Any additional keyword arguments are passed to :class:`~bokeh.server.Server` when showing a Bokeh app (added in version 1.1) Returns: When in a Jupyter notebook (with |output_notebook| enabled) and ``notebook_handle=True``, returns a handle that can be used by ``push_notebook``, None otherwise. ''' state = curstate() if isinstance(obj, LayoutDOM): return _show_with_state(obj, state, browser, new, notebook_handle=notebook_handle) def is_application(obj: Any) -> TypeGuard[Application]: return getattr(obj, '_is_a_bokeh_application_class', False) if is_application(obj) or callable(obj): # TODO (bev) check callable signature more thoroughly # This ugliness is to prevent importing bokeh.application (which would bring # in Tornado) just in order to show a non-server object assert state.notebook_type is not None return run_notebook_hook(state.notebook_type, 'app', obj, state, notebook_url, **kwargs) raise ValueError(_BAD_SHOW_MSG)
#----------------------------------------------------------------------------- # Dev API #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Private API #----------------------------------------------------------------------------- _BAD_SHOW_MSG = """Invalid object to show. The object to passed to show must be one of: * a LayoutDOM (e.g. a Plot or Widget or Layout) * a Bokeh Application * a callable suitable to an application FunctionHandler """ def _show_file_with_state(obj: LayoutDOM, state: State, new: BrowserTarget, controller: BrowserLike) -> None: ''' ''' filename = save(obj, state=state)"file://" + filename, new=NEW_PARAM[new]) def _show_with_state(obj: LayoutDOM, state: State, browser: str | None, new: BrowserTarget, notebook_handle: bool = False) -> CommsHandle | None: ''' ''' controller = get_browser_controller(browser=browser) comms_handle = None shown = False if state.notebook: assert state.notebook_type is not None comms_handle = run_notebook_hook(state.notebook_type, 'doc', obj, state, notebook_handle) shown = True if state.file or not shown: _show_file_with_state(obj, state, new, controller) return comms_handle #----------------------------------------------------------------------------- # Code #-----------------------------------------------------------------------------