Python第三方库之openpyxl(8)

Python第三方库之openpyxl(8)

饼图

饼图将数据绘制成一个圆片，每个片代表整体的百分比。切片是按顺时针方向绘制的，0在圆的顶部。饼图只能取一组数据。该图表的标题将默认为该系列的标题。

2D饼图

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")

运行结果

2D投影饼图

投影饼图从饼图中提取出一些切片，并将它们投射到第二个饼状图或柱状图中。当数据系列中有几个较小的项时，这是很有用的。图表可以根据百分比、val（ue）或pos（ition）进行分割。如果没有设置任何东西，应用程序就决定使用哪一个。此外，还可以定义自定义分割。

3D饼状图

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")

运行结果