#-----------------------------------------------------------------------------
# Copyright (c) 2012 - 2023, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
#-----------------------------------------------------------------------------
''' Provide U.S. marriage and divorce statistics between 1867 and 2014

License: `Public Domain`_

Sourced from http://www.cdc.gov/nchs/

This module contains one pandas Dataframe: ``data``.

.. rubric:: ``data``

:bokeh-dataframe:`bokeh.sampledata.us_marriages_divorces.data`

.. bokeh-sampledata-xref:: us_marriages_divorces
'''

#-----------------------------------------------------------------------------
# Boilerplate
#-----------------------------------------------------------------------------
from __future__ import annotations

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

#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------

# Standard library imports
from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from pandas import DataFrame

# Bokeh imports
from ..util.sampledata import package_csv

#-----------------------------------------------------------------------------
# Globals and constants
#-----------------------------------------------------------------------------

__all__ = (
    'data',
)

#-----------------------------------------------------------------------------
# General API
#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------
# Dev API
#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------
# Private API
#-----------------------------------------------------------------------------

def _read_data() -> DataFrame:
    '''

    '''

    data = package_csv('us_marriages_divorces', 'us_marriages_divorces.csv')
    return data.interpolate(method='linear', axis=0).ffill().bfill()

#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------

data = _read_data()