ChartDataLabelCollection indexer

__getitem__(index)

Returns ChartDataLabel for the specified index.

def __getitem__(self, index: int):
    ...
ParameterTypeDescription
indexint

Examples

Shows how to apply labels to data points in a line chart.

def data_labels():
    doc = aw.Document()
    builder = aw.DocumentBuilder(doc)
    chart_shape = builder.insert_chart(aw.drawing.charts.ChartType.LINE, 400, 300)
    chart = chart_shape.chart
    self.assertEqual(3, chart.series.count)
    self.assertEqual('Series 1', chart.series[0].name)
    self.assertEqual('Series 2', chart.series[1].name)
    self.assertEqual('Series 3', chart.series[2].name)
    # Apply data labels to every series in the chart.
    # These labels will appear next to each data point in the graph and display its value.
    for series in chart.series:
        apply_data_labels(series, 4, '000.0', ', ')
        self.assertEqual(4, series.data_labels.count)
    # Change the separator string for every data label in a series.
    for label in chart.series[0].data_labels:
        self.assertEqual(', ', label.separator)
        label.separator = ' & '
    # For a cleaner looking graph, we can remove data labels individually.
    chart.series[1].data_labels[2].clear_format()
    # We can also strip an entire series of its data labels at once.
    chart.series[2].data_labels.clear_format()
    doc.save(ARTIFACTS_DIR + 'Charts.data_labels.docx')

def apply_data_labels(series: aw.drawing.charts.ChartSeries, labels_count: int, number_format: str, separator: str):
    """Apply data labels with custom number format and separator to several data points in a series."""
    for i in range(labels_count):
        series.has_data_labels = True
        self.assertFalse(series.data_labels[i].is_visible)
        series.data_labels[i].show_category_name = True
        series.data_labels[i].show_series_name = True
        series.data_labels[i].show_value = True
        series.data_labels[i].show_leader_lines = True
        series.data_labels[i].show_legend_key = True
        series.data_labels[i].show_percentage = False
        series.data_labels[i].is_hidden = False
        self.assertFalse(series.data_labels[i].show_data_labels_range)
        series.data_labels[i].number_format.format_code = number_format
        series.data_labels[i].separator = separator
        self.assertFalse(series.data_labels[i].show_data_labels_range)
        self.assertTrue(series.data_labels[i].is_visible)
        self.assertFalse(series.data_labels[i].is_hidden)

See Also

ChartDataLabelCollection.count property