饼图¶

饼图将数据绘制为圆的切片，每个切片表示整个圆的百分比。切片按顺时针方向绘制，0°位于圆的顶部。饼图只接受一系列数值，标题将默认为系列的标题。

1 from openpyxl import Workbook

2

3 from openpyxl.chart import (

4 PieChart,

5 ProjectedPieChart,

6 Reference

7 )

8 from openpyxl.chart.series import DataPoint

9

10 data = [

11 ['Pie', 'Sold'],

12 ['Apple', 50],

13 ['Cherry', 30],

14 ['Pumpkin', 10],

15 ['Chocolate', 40],

16 ]

17

18 wb = Workbook()

19 ws = wb.active

20

21 for row in data:

22 ws.append(row)

23

24 pie = PieChart()

25 labels = Reference(ws, min_col=1, min_row=2, max_row=5)

26 data = Reference(ws, min_col=2, min_row=1, max_row=5)

27 pie.add_data(data, titles_from_data=True)

28 pie.set_categories(labels)

29 pie.title = "Pies sold by category"

30

31 # Cut the first slice out of the pie

32 slice = DataPoint(idx=0, explosion=20)

33 pie.series[0].data_points = [slice]

34

35 ws.add_chart(pie, "D1")

36

37

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

39

40 data = [

41 ['Page', 'Views'],

42 ['Search', 95],

43 ['Products', 4],

44 ['Offers', 0.5],

45 ['Sales', 0.5],

46 ]

47

48 for row in data:

49 ws.append(row)

50

51 projected_pie = ProjectedPieChart()

52 projected_pie.type = "pie"

53 projected_pie.splitType = "val" # split by value

54 labels = Reference(ws, min_col=1, min_row=2, max_row=5)

55 data = Reference(ws, min_col=2, min_row=1, max_row=5)

56 projected_pie.add_data(data, titles_from_data=True)

57 projected_pie.set_categories(labels)

58

59 ws.add_chart(projected_pie, "A10")

60

61 from copy import deepcopy

62 projected_bar = deepcopy(projected_pie)

63 projected_bar.type = "bar"

64 projected_bar.splitType = 'pos' # split by position

65

66 ws.add_chart(projected_bar, "A27")

67

68 wb.save("pie.xlsx")

投影饼图¶

投影饼图从饼图中提取一些切片并投影到第二个饼图或条形图中。当数据系列中有很多较小的项时，这非常有用。图表可以按百分比、值(value)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。此外，还可以自定义拆分。

三维饼图¶

饼图也可以用三维效果创建。

1 from openpyxl import Workbook

2

3 from openpyxl.chart import (

4 PieChart3D,

5 Reference

6 )

7

8 data = [

9 ['Pie', 'Sold'],

10 ['Apple', 50],

11 ['Cherry', 30],

12 ['Pumpkin', 10],

13 ['Chocolate', 40],

14 ]

15

16 wb = Workbook()

17 ws = wb.active

18

19 for row in data:

20 ws.append(row)

21

22 pie = PieChart3D()

23 labels = Reference(ws, min_col=1, min_row=2, max_row=5)

24 data = Reference(ws, min_col=2, min_row=1, max_row=5)

25 pie.add_data(data, titles_from_data=True)

26 pie.set_categories(labels)

27 pie.title = "Pies sold by category"

28

29

30 ws.add_chart(pie, "D1")

31

32 wb.save("pie3D.xlsx")

渐变饼图¶

也可以使用渐变序列创建饼图。