饼图

饼图

饼图将数据绘制为一个圆的切片，每个切片代表整个百分比。切片按顺时针方向绘制，0°位于圆的顶部。饼图只能接受一系列数据。图表的标题将默认为系列的标题。

from openpyxl import Workbook

from openpyxl.chart import (
    PieChart,
    ProjectedPieChart,
    Reference
)
from openpyxl.chart.series import DataPoint

data = [
    ['Pie', 'Sold'],
    ['Apple', 50],
    ['Cherry', 30],
    ['Pumpkin', 10],
    ['Chocolate', 40],
]

wb = Workbook()
ws = wb.active

for row in data:
    ws.append(row)

pie = PieChart()
labels = Reference(ws, min_col=1, min_row=2, max_row=5)
data = Reference(ws, min_col=2, min_row=1, max_row=5)
pie.add_data(data, titles_from_data=True)
pie.set_categories(labels)
pie.title = "Pies sold by category"

# Cut the first slice out of the pie
slice = DataPoint(idx=0, explosion=20)
pie.series[0].data_points = [slice]

ws.add_chart(pie, "D1")


ws = wb.create_sheet(title="Projection")

data = [
    ['Page', 'Views'],
    ['Search', 95],
    ['Products', 4],
    ['Offers', 0.5],
    ['Sales', 0.5],
]

for row in data:
    ws.append(row)

projected_pie = ProjectedPieChart()
projected_pie.type = "pie"
projected_pie.splitType = "val" # split by value
labels = Reference(ws, min_col=1, min_row=2, max_row=5)
data = Reference(ws, min_col=2, min_row=1, max_row=5)
projected_pie.add_data(data, titles_from_data=True)
projected_pie.set_categories(labels)

ws.add_chart(projected_pie, "A10")

from copy import deepcopy
projected_bar = deepcopy(projected_pie)
projected_bar.type = "bar"
projected_bar.splitType = 'pos' # split by position

ws.add_chart(projected_bar, "A27")

wb.save("pie.xlsx")

投影饼图

投影饼图从饼图中提取一些切片，并将它们投影到第二个饼图或条形图中。当数据系列中有几个较小的项时，这很有用。图表可以根据百分比、值或位置进行拆分。如果未设置任何内容，则应用程序将决定使用哪个选项。此外，还可以定义自定义拆分。

三维饼图

饼图也可以使用三维效果创建。

from openpyxl import Workbook

from openpyxl.chart import (
    PieChart3D,
    Reference
)

data = [
    ['Pie', 'Sold'],
    ['Apple', 50],
    ['Cherry', 30],
    ['Pumpkin', 10],
    ['Chocolate', 40],
]

wb = Workbook()
ws = wb.active

for row in data:
    ws.append(row)

pie = PieChart3D()
labels = Reference(ws, min_col=1, min_row=2, max_row=5)
data = Reference(ws, min_col=2, min_row=1, max_row=5)
pie.add_data(data, titles_from_data=True)
pie.set_categories(labels)
pie.title = "Pies sold by category"


ws.add_chart(pie, "D1")

wb.save("pie3D.xlsx")

渐变饼图

饼图也可以使用渐变系列创建。

..LiteralInclude:：Pie-Gradient.py