max_col使用openpyxl创建饼图时仅选择两列

Question

我正在尝试创建一个饼图，其中数据位于行中，标签位于列中。我想在第2行直到第4列绘制数据。但是当我运行时，它仅选择两列。下面是代码：

from openpyxl import Workbook

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

data = [
    ['Pie', 'Sold','Added','New','extra'],
    ['Apple', 50,3,4,5],
    ['Cherry', 30,5,6,7],
    ['Pumpkin', 10,7,8,99],
    ['Chocolate', 40,10,29,23],
]

wb = Workbook()
ws = wb.active

for row in data:
    ws.append(row)

pie = PieChart()
labels = Reference(ws, min_row=1, min_col=2, max_col=4)
data = Reference(ws, min_col=2, min_row=2, max_col=4)
pie.add_data(data, titles_from_data=True)
pie.set_categories(labels)
pie.title = "Pies sold by category"
ws.add_chart(pie, "G20")


ws = wb.create_sheet(title="Projection")
wb.save("pie.xlsx")

This my result

但是我希望expected result

我的问题：我尝试将max_col更改为其他数字，但仅选择2

Answer 1

我没有使用Openxlpy太多，但是看看下面几行是否可以帮助解决循环相关的查询。

import openpyxl
wb = openpyxl.load_workbook(r'yourfile.xlsx')
ws = wb['yoursheet']

for rowno, rowval in enumerate(ws.iter_rows( min_col=2, min_row=2,max_col=4)):
    for cell in rowval:
        label = ws.cell(row=cell.row, column=1).value
        print(label)
        data = ws.cell(row=cell.row, column=2).value
        print(data)

Answer 2

经过源代码后，我找到了解决方案。默认情况下，pie.add_data将每列视为数据系列。因此，我需要在from_rows中添加pie.add_data值以选择该行作为数据系列，并且必须更新min_col中的data = Reference(ws, min_col=1, min_row=2, max_col=4)。以下是所需的工作代码：

from openpyxl import Workbook

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

data = [
    ['Pie', 'Sold','Added','New','extra'],
    ['Apple', 50,3,4,5],
    ['Cherry', 30,5,6,7],
    ['Pumpkin', 10,7,8,99],
    ['Chocolate', 40,10,29,23],
]

wb = Workbook()
ws = wb.active

for row in data:
    ws.append(row)

pie = PieChart()
labels = Reference(ws, min_row=1, min_col=2, max_col=4)
data = Reference(ws, min_col=1, min_row=2, max_col=4)
#data = Reference(ws, range_string='Sheet!$B$2:$D$2')

pie.add_data(data, from_rows=2,titles_from_data=True)
pie.set_categories(labels)
pie.title = "Pies sold by category"
ws.add_chart(pie, "H2")


ws = wb.create_sheet(title="Projection")
wb.save("pie.xlsx")