test_tables.py at master ⋅ holoviz/panel

from __future__ import absolute_import, division, unicode_literals

import datetime as dt
import pytest

import numpy as np

try:
    import pandas as pd
    from pandas.util.testing import (
        makeCustomDataframe, makeMixedDataFrame, makeTimeDataFrame
    )
except ImportError:
    pytestmark = pytest.mark.skip('pandas not available')

from bokeh.models.widgets.tables import (
    NumberFormatter, IntEditor, NumberEditor, StringFormatter,
    SelectEditor, DateFormatter, DataCube, CellEditor,
    SumAggregator, AvgAggregator, MinAggregator
)

from panel.depends import bind
from panel.widgets import DataFrame, Tabulator, TextInput


def test_dataframe_widget(dataframe, document, comm):

    table = DataFrame(dataframe)

    model = table.get_root(document, comm)

    index_col, int_col, float_col, str_col = model.columns

    assert index_col.title == 'index'
    assert isinstance(index_col.formatter, NumberFormatter)
    assert isinstance(index_col.editor, CellEditor)

    assert int_col.title == 'int'
    assert isinstance(int_col.formatter, NumberFormatter)
    assert isinstance(int_col.editor, IntEditor)

    assert float_col.title == 'float'
    assert isinstance(float_col.formatter, NumberFormatter)
    assert isinstance(float_col.editor, NumberEditor)

    assert str_col.title == 'str'
    assert isinstance(float_col.formatter, StringFormatter)
    assert isinstance(float_col.editor, NumberEditor)


def test_dataframe_widget_no_show_index(dataframe, document, comm):
    table = DataFrame(dataframe, show_index=False)

    model = table.get_root(document, comm)

    assert len(model.columns) == 3
    int_col, float_col, str_col = model.columns
    assert int_col.title == 'int'
    assert float_col.title == 'float'
    assert str_col.title == 'str'

    table.show_index = True

    assert len(model.columns) == 4
    index_col, int_col, float_col, str_col = model.columns
    assert index_col.title == 'index'
    assert int_col.title == 'int'
    assert float_col.title == 'float'
    assert str_col.title == 'str'


def test_dataframe_widget_datetimes(document, comm):

    table = DataFrame(makeTimeDataFrame())

    model = table.get_root(document, comm)

    dt_col, _, _, _, _ = model.columns

    assert dt_col.title == 'index'
    assert isinstance(dt_col.formatter, DateFormatter)
    assert isinstance(dt_col.editor, CellEditor)


def test_dataframe_editors(dataframe, document, comm):
    editor = SelectEditor(options=['A', 'B', 'C'])
    table = DataFrame(dataframe, editors={'str': editor})
    model = table.get_root(document, comm)

    assert model.columns[-1].editor is editor


def test_dataframe_formatter(dataframe, document, comm):
    formatter = NumberFormatter(format='0.0000')
    table = DataFrame(dataframe, formatters={'float': formatter})
    model = table.get_root(document, comm)
    assert model.columns[2].formatter is formatter


def test_dataframe_triggers(dataframe):
    events = []

    def increment(event, events=events):
        events.append(event)

    table = DataFrame(dataframe)
    table.param.watch(increment, 'value')
    table._process_events({'data': {'str': ['C', 'B', 'A']}})
    assert len(events) == 1


def test_dataframe_does_not_trigger(dataframe):
    events = []

    def increment(event, events=events):
        events.append(event)

    table = DataFrame(dataframe)
    table.param.watch(increment, 'value')
    table._process_events({'data': {'str': ['A', 'B', 'C']}})
    assert len(events) == 0


def test_dataframe_selected_dataframe(dataframe):
    table = DataFrame(dataframe, selection=[0, 2])
    pd.testing.assert_frame_equal(table.selected_dataframe, dataframe.iloc[[0, 2]])


def test_dataframe_process_selection_event(dataframe):
    table = DataFrame(dataframe, selection=[0, 2])
    table._process_events({'indices': [0, 2]})
    pd.testing.assert_frame_equal(table.selected_dataframe, dataframe.iloc[[0, 2]])


def test_dataframe_process_data_event(dataframe):
    df = dataframe.copy()

    table = DataFrame(dataframe, selection=[0, 2])
    table._process_events({'data': {'int': [5, 7, 9]}})
    df['int'] = [5, 7, 9]
    pd.testing.assert_frame_equal(table.value, df)

    table._process_events({'data': {'int': {1: 3, 2: 4, 0: 1}}})
    df['int'] = [1, 3, 4]
    pd.testing.assert_frame_equal(table.value, df)


def test_dataframe_duplicate_column_name(document, comm):
    df = pd.DataFrame([[1, 1], [2, 2]], columns=['col', 'col'])
    with pytest.raises(ValueError):
        table = DataFrame(df)

    df = pd.DataFrame([[1, 1], [2, 2]], columns=['a', 'b'])
    table = DataFrame(df)
    with pytest.raises(ValueError):
        table.value = table.value.rename(columns={'a': 'b'})

    df = pd.DataFrame([[1, 1], [2, 2]], columns=['a', 'b'])
    table = DataFrame(df)
    table.get_root(document, comm)
    with pytest.raises(ValueError):
        table.value = table.value.rename(columns={'a': 'b'})


def test_hierarchical_index(document, comm):
    df = pd.DataFrame([
        ('Germany', 2020, 9, 2.4, 'A'),
        ('Germany', 2021, 3, 7.3, 'C'),
        ('Germany', 2022, 6, 3.1, 'B'),
        ('UK', 2020, 5, 8.0, 'A'),
        ('UK', 2021, 1, 3.9, 'B'),
        ('UK', 2022, 9, 2.2, 'A')
    ], columns=['Country', 'Year', 'Int', 'Float', 'Str']).set_index(['Country', 'Year'])

    table = DataFrame(value=df, hierarchical=True,
                      aggregators={'Year': {'Int': 'sum', 'Float': 'mean'}})

    model = table.get_root(document, comm)
    assert isinstance(model, DataCube)
    assert len(model.grouping) == 1
    grouping = model.grouping[0]
    assert len(grouping.aggregators) == 2
    agg1, agg2 = grouping.aggregators
    assert agg1.field_ == 'Int'
    assert isinstance(agg1, SumAggregator)
    assert agg2.field_ == 'Float'
    assert isinstance(agg2, AvgAggregator)

    table.aggregators = {'Year': 'min'}

    agg1, agg2 = grouping.aggregators
    print(grouping)
    assert agg1.field_ == 'Int'
    assert isinstance(agg1, MinAggregator)
    assert agg2.field_ == 'Float'
    assert isinstance(agg2, MinAggregator)


def test_none_table(document, comm):
    table = DataFrame(value=None)
    assert table.indexes == []

    model = table.get_root(document, comm)

    assert model.source.data == {}


def test_tabulator_config_defaults(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    model = table.get_root(document, comm)

    assert model.configuration['columns'] == [
        {'field': 'index'},
        {'field': 'A'},
        {'field': 'B'},
        {'field': 'C'},
        {'field': 'D'}
    ]
    assert model.configuration['selectable'] == True


def test_tabulator_config_formatter_string(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df, formatters={'B': 'tickCross'})

    model = table.get_root(document, comm)

    assert model.configuration['columns'][2] == {'field': 'B', 'formatter': 'tickCross'}


def test_tabulator_config_formatter_dict(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df, formatters={'B': {'type': 'tickCross', 'tristate': True}})

    model = table.get_root(document, comm)

    assert model.configuration['columns'][2] == {'field': 'B', 'formatter': 'tickCross', 'formatterParams': {'tristate': True}}


def test_tabulator_config_editor_string(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df, editors={'B': 'select'})

    model = table.get_root(document, comm)

    assert model.configuration['columns'][2] == {'field': 'B', 'editor': 'select'}


def test_tabulator_config_editor_dict(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df, editors={'B': {'type': 'select', 'values': True}})

    model = table.get_root(document, comm)

    assert model.configuration['columns'][2] == {'field': 'B', 'editor': 'select', 'editorParams': {'values': True}}


def test_tabulator_groups(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df, groups={'Number': ['A', 'B'], 'Other': ['C', 'D']})

    model = table.get_root(document, comm)

    assert model.configuration['columns'] == [
        {'field': 'index'},
        {'title': 'Number',
         'columns': [
            {'field': 'A'},
            {'field': 'B'}
        ]},
        {'title': 'Other',
         'columns': [
            {'field': 'C'},
            {'field': 'D'}
        ]}
    ]


def test_tabulator_frozen_cols(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df, frozen_columns=['index'])

    model = table.get_root(document, comm)

    assert model.configuration['columns'] == [
        {'field': 'index', 'frozen': True},
        {'field': 'A'},
        {'field': 'B'},
        {'field': 'C'},
        {'field': 'D'}
    ]


def test_tabulator_frozen_rows(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df, frozen_rows=[0, -1])

    model = table.get_root(document, comm)

    assert model.frozen_rows == [0, 4]

    table.frozen_rows = [1, -2]

    assert model.frozen_rows == [1, 3]


def test_tabulator_pagination(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df, pagination='remote', page_size=2)

    model = table.get_root(document, comm)

    assert model.max_page == 3
    assert model.page_size == 2
    assert model.page == 1

    expected = {
        'index': np.array([0, 1]),
        'A': np.array([0, 1]),
        'B': np.array([0, 1]),
        'C': np.array(['foo1', 'foo2']),
        'D': np.array(['2009-01-01T00:00:00.000000000',
                       '2009-01-02T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])

    table.page = 2

    expected = {
        'index': np.array([2, 3]),
        'A': np.array([2, 3]),
        'B': np.array([0., 1.]),
        'C': np.array(['foo3', 'foo4']),
        'D': np.array(['2009-01-05T00:00:00.000000000',
                       '2009-01-06T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])

    table.page_size = 3
    table.page = 1

    assert model.max_page == 2

    expected = {
        'index': np.array([0, 1, 2]),
        'A': np.array([0, 1, 2]),
        'B': np.array([0, 1, 0]),
        'C': np.array(['foo1', 'foo2', 'foo3']),
        'D': np.array(['2009-01-01T00:00:00.000000000',
                       '2009-01-02T00:00:00.000000000',
                       '2009-01-05T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])


def test_tabulator_pagination_selection(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df, pagination='remote', page_size=2)

    model = table.get_root(document, comm)

    table.selection = [2, 3]

    assert model.source.selected.indices == []

    table.page = 2

    assert model.source.selected.indices == [0, 1]


def test_tabulator_styling(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    def high_red(value):
        return 'color: red' if value > 2 else 'color: black'

    table.style.applymap(high_red, subset=['A'])

    model = table.get_root(document, comm)

    assert model.styles == {
        0: {1: ['color: black']},
        1: {1: ['color: black']},
        2: {1: ['color: black']},
        3: {1: ['color: red']},
        4: {1: ['color: red']}
    }

def test_tabulator_stream_series(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    model = table.get_root(document, comm)

    stream_value = pd.Series({'A': 5, 'B': 1, 'C': 'foo6', 'D': dt.datetime(2009, 1, 8)})

    table.stream(stream_value)

    assert len(table.value) == 6

    expected = {
        'index': np.array([0, 1, 2, 3, 4, 5]),
        'A': np.array([0, 1, 2, 3, 4, 5]),
        'B': np.array([0, 1, 0, 1, 0, 1]),
        'C': np.array(['foo1', 'foo2', 'foo3', 'foo4', 'foo5', 'foo6']),
        'D': np.array(['2009-01-01T00:00:00.000000000',
                       '2009-01-02T00:00:00.000000000',
                       '2009-01-05T00:00:00.000000000',
                       '2009-01-06T00:00:00.000000000',
                       '2009-01-07T00:00:00.000000000',
                       '2009-01-08T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])


def test_tabulator_stream_scalars(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    model = table.get_root(document, comm)

    table.patch({'A': [(0, 2), (4, 1)], 'C': [(0, 'foo0')]})

    expected = {
        'index': np.array([0, 1, 2, 3, 4]),
        'A': np.array([2, 1, 2, 3, 1]),
        'B': np.array([0, 1, 0, 1, 0]),
        'C': np.array(['foo0', 'foo2', 'foo3', 'foo4', 'foo5']),
        'D': np.array(['2009-01-01T00:00:00.000000000',
                       '2009-01-02T00:00:00.000000000',
                       '2009-01-05T00:00:00.000000000',
                       '2009-01-06T00:00:00.000000000',
                       '2009-01-07T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])


def test_tabulator_stream_ranges(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    model = table.get_root(document, comm)

    table.patch({
        'A': [(slice(0, 5), [5, 4, 3, 2, 1])],
        'C': [(slice(0, 3), ['foo3', 'foo2', 'foo1'])]
    })

    expected = {
        'index': np.array([0, 1, 2, 3, 4]),
        'A': np.array([5, 4, 3, 2, 1]),
        'B': np.array([0, 1, 0, 1, 0]),
        'C': np.array(['foo3', 'foo2', 'foo1', 'foo4', 'foo5']),
        'D': np.array(['2009-01-01T00:00:00.000000000',
                       '2009-01-02T00:00:00.000000000',
                       '2009-01-05T00:00:00.000000000',
                       '2009-01-06T00:00:00.000000000',
                       '2009-01-07T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])


def test_tabulator_stream_series_paginated_not_follow(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df, pagination='remote', page_size=2)

    model = table.get_root(document, comm)

    stream_value = pd.Series({'A': 5, 'B': 1, 'C': 'foo6', 'D': dt.datetime(2009, 1, 8)})

    table.stream(stream_value, follow=False)

    assert table.page == 1
    assert len(table.value) == 6

    expected = {
        'index': np.array([0, 1]),
        'A': np.array([0, 1]),
        'B': np.array([0, 1]),
        'C': np.array(['foo1', 'foo2']),
        'D': np.array(['2009-01-01T00:00:00.000000000',
                       '2009-01-02T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])



def test_tabulator_stream_series_paginated_follow(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df, pagination='remote', page_size=2)

    model = table.get_root(document, comm)

    stream_value = pd.Series({'A': 5, 'B': 1, 'C': 'foo6', 'D': dt.datetime(2009, 1, 8)})

    table.stream(stream_value, follow=True)

    assert table.page == 3
    assert len(table.value) == 6

    expected = {
        'index': np.array([4, 5]),
        'A': np.array([4, 5]),
        'B': np.array([0, 1]),
        'C': np.array(['foo5', 'foo6']),
        'D': np.array(['2009-01-07T00:00:00.000000000',
                       '2009-01-08T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])


def test_tabulator_paginated_sorted_selection(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df, pagination='remote', page_size=2)

    table.sorters = [{'field': 'A', 'dir': 'dec'}]

    model = table.get_root(document, comm)

    table.selection = [3]
    assert model.source.selected.indices == [1]

    table.selection = [0, 1]
    assert model.source.selected.indices == []

    table.selection = [3, 4]
    assert model.source.selected.indices == [1, 0]

    table.selection = []
    assert model.source.selected.indices == []

    table._process_events({'indices': [0, 1]})
    assert table.selection == [4, 3]

    table._process_events({'indices': [1]})
    assert table.selection == [3]

    table.sorters = [{'field': 'A', 'dir': 'asc'}]
    table._process_events({'indices': [1]})
    assert table.selection == [1]


def test_tabulator_stream_dataframe(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    model = table.get_root(document, comm)

    stream_value = pd.DataFrame({
        'A': [5, 6],
        'B': [1, 0],
        'C': ['foo6', 'foo7'],
        'D': [dt.datetime(2009, 1, 8), dt.datetime(2009, 1, 9)]
    })

    table.stream(stream_value)

    assert len(table.value) == 7

    expected = {
        'index': np.array([0, 1, 2, 3, 4, 5, 6]),
        'A': np.array([0, 1, 2, 3, 4, 5, 6]),
        'B': np.array([0, 1, 0, 1, 0, 1, 0]),
        'C': np.array(['foo1', 'foo2', 'foo3', 'foo4', 'foo5', 'foo6', 'foo7']),
        'D': np.array(['2009-01-01T00:00:00.000000000',
                       '2009-01-02T00:00:00.000000000',
                       '2009-01-05T00:00:00.000000000',
                       '2009-01-06T00:00:00.000000000',
                       '2009-01-07T00:00:00.000000000',
                       '2009-01-08T00:00:00.000000000',
                       '2009-01-09T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])


def test_tabulator_constant_scalar_filter(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    model = table.get_root(document, comm)

    table.add_filter('foo3', 'C')

    expected = {
        'index': np.array([2]),
        'A': np.array([2]),
        'B': np.array([0]),
        'C': np.array(['foo3']),
        'D': np.array(['2009-01-05T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])


def test_tabulator_constant_list_filter(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    model = table.get_root(document, comm)

    table.add_filter(['foo3', 'foo5'], 'C')

    expected = {
        'index': np.array([2, 4]),
        'A': np.array([2, 4]),
        'B': np.array([0, 0]),
        'C': np.array(['foo3', 'foo5']),
        'D': np.array(['2009-01-05T00:00:00.000000000',
                       '2009-01-07T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])


def test_tabulator_widget_scalar_filter(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    model = table.get_root(document, comm)

    widget = TextInput(value='foo3')
    table.add_filter(widget, 'C')

    expected = {
        'index': np.array([2]),
        'A': np.array([2]),
        'B': np.array([0]),
        'C': np.array(['foo3']),
        'D': np.array(['2009-01-05T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])

    widget.value = 'foo1'

    expected = {
        'index': np.array([0]),
        'A': np.array([0]),
        'B': np.array([0]),
        'C': np.array(['foo1']),
        'D': np.array(['2009-01-01T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])


def test_tabulator_function_filter(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    model = table.get_root(document, comm)

    widget = TextInput(value='foo3')

    def filter_c(df, value):
        return df[df.C.str.contains(value)]

    table.add_filter(bind(filter_c, value=widget), 'C')

    expected = {
        'index': np.array([2]),
        'A': np.array([2]),
        'B': np.array([0]),
        'C': np.array(['foo3']),
        'D': np.array(['2009-01-05T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])

    widget.value = 'foo1'

    expected = {
        'index': np.array([0]),
        'A': np.array([0]),
        'B': np.array([0]),
        'C': np.array(['foo1']),
        'D': np.array(['2009-01-01T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])


def test_tabulator_constant_tuple_filter(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    model = table.get_root(document, comm)

    table.add_filter((2, 3), 'A')

    expected = {
        'index': np.array([2, 3]),
        'A': np.array([2, 3]),
        'B': np.array([0, 1]),
        'C': np.array(['foo3', 'foo4']),
        'D': np.array(['2009-01-05T00:00:00.000000000',
                       '2009-01-06T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])


def test_tabulator_stream_dataframe_with_filter(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    model = table.get_root(document, comm)

    table.add_filter(['foo2', 'foo7'], 'C')

    stream_value = pd.DataFrame({
        'A': [5, 6],
        'B': [1, 0],
        'C': ['foo6', 'foo7'],
        'D': [dt.datetime(2009, 1, 8), dt.datetime(2009, 1, 9)]
    })

    table.stream(stream_value)

    assert len(table.value) == 7

    expected = {
        'index': np.array([1, 6]),
        'A': np.array([1, 6]),
        'B': np.array([1, 0]),
        'C': np.array(['foo2', 'foo7']),
        'D': np.array(['2009-01-02T00:00:00.000000000',
                       '2009-01-09T00:00:00.000000000'],
                      dtype='datetime64[ns]')
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])


def test_tabulator_dataframe_replace_data(document, comm):
    df = makeMixedDataFrame()
    table = Tabulator(df)

    model = table.get_root(document, comm)

    table.value = makeCustomDataframe(2, 2)

    assert len(model.columns) == 3
    c1, c2, c3 = model.columns
    assert c1.field == 'R0'
    assert c2.field == 'C_l0_g0'
    assert c3.field == 'C_l0_g1'
    assert model.configuration == {
        'columns': [{'field': 'R0'}, {'field': 'C_l0_g0'}, {'field': 'C_l0_g1'}],
        'selectable': True
    }
    expected = {
        'C_l0_g0': np.array(['R0C0', 'R1C0'], dtype=object),
        'C_l0_g1': np.array(['R0C1', 'R1C1'], dtype=object),
        'R0': np.array(['R_l0_g0', 'R_l0_g1'], dtype=object)
    }
    for col, values in model.source.data.items():
        np.testing.assert_array_equal(values, expected[col])
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