Source code for bokeh.util.options

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# Copyright (c) 2012 - 2021, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
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""" Utilities for specifying, validating, and documenting configuration
options.

"""

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

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# Imports
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# Standard library imports
from typing import Any, Dict

# Bokeh imports
from ..core.has_props import HasProps

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# Globals and constants
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__all__ = (
    'Options',
)

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# General API
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class Options(HasProps):
    ''' Leverage the Bokeh properties type system for specifying and
    validating configuration options.

    Subclasses of ``Options`` specify a set of configuration options
    using standard Bokeh properties:

    .. code-block:: python

        class ConnectOpts(Options):

            host = String(default="127.0.0.1", help="a host value")

            port = Int(default=5590, help="a port value")

    Then a ``ConnectOpts`` can be created by passing a dictionary
    containing keys and values corresponding to the configuration options,
    as well as any additional keys and values. The items corresponding
    to the properties on ``ConnectOpts`` will be ***removed*** from the
    dictionary. This can be useful for functions that accept their own
    set of config keyword arguments in addition to some set of Bokeh model
    properties.

    '''

    def __init__(self, kw: Dict[str, Any]) -> None:

        # remove any items that match our declared properties
        props: Dict[str, Any] = {}
        for k in self.properties():
            if k in kw:
                props[k] = kw.pop(k)

        super().__init__(**props)

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# Dev API
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# Private API
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# Code
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