Datalabels

Custom datalabel policy with filter

import easychart

datalabels = {
    "enabled": True,
    "format": "{point.y} {point.series.name} in {point.category} ({point.color})",
    "filter": {"property": "y", "operator": ">", "value": 0},
}

chart = easychart.new("column")
chart.stacked = True
chart.title = "Adoptions per month, by animal"
chart.categories = ["June", "July", "August"]
chart.plot([1, 3, 5], name="cats", datalabels=datalabels)
chart.plot([1, 0, 4], name="dogs", datalabels=datalabels)

chart

Using named points with datalabel filter

import easychart

datalabels = {
    "enabled": True,
    "format": "{point.name}",
    "filter": {"property": "y", "operator": ">", "value": 0},
}


def pluralize(quantity, label):
    """
    Pluralize a category if quantity > 2
    """
    if quantity < 2:
        return label
    return label + "s"


def label(quantity, category):
    """
    Create a data label for a given point (y) and category (category)
    """
    return str(quantity) + " " + pluralize(quantity, category)


chart = easychart.new("column")
chart.stacked = True
chart.title = "Adoptions per month, by animal"
chart.categories = ["June", "July", "August"]
chart.plot(
    [{"y": y, "name": label(y, "cat")} for y in [1, 3, 5]],
    name="cats",
    datalabels=datalabels,
)
chart.plot(
    [{"y": y, "name": label(y, "dog")} for y in [2, 1, 5]],
    name="dogs",
    datalabels=datalabels,
)

chart

With various label options enabled

import easychart

chart = easychart.new("column")
chart.stacked = True
chart.title = "Total fruit consumption, grouped by gender"
chart.categories = ["Apples", "Oranges", "Pears", "Grapes", "Bananas"]
with chart.yAxis as axis:
    axis.allowDecimals = False
    axis.min = 0
    axis.title.text = "Number of fruits"

chart.tooltip = "{value:.0f}"
chart.plot(
    [5, 3, 4, 7, 2],
    name="John",
    stack="male",
    labels="{point.y} fruits <br /> ({point.percentage:.0f}%)",
)
chart.plot([3, 4, 4, 2, 5], name="Joe", stack="male", labels="{point.series.name}")
chart.plot([2, 5, 6, 2, 1], name="Jane", stack="female", labels="{point.category}")
chart.plot(
    [3, 0, 4, 4, 3],
    name="Janet",
    stack="female",
    labels="{point.y} out of {point.total}",
)
chart

Labeled pie chart

import easychart

labels = ["O", "A", "B", "AB"]
values = [45, 40, 11, 4]

chart = easychart.new("pie", title="Distribution of blood type in the US")
chart.subtitle = "Source: American Red Cross"
chart.tooltip = "{point.percentage:.0f}%"
chart.plot(values, index=labels, labels="{point.name} ({point.y}%)")
chart