使用ReportLab将数据帧转换为网格格式。如何在网格中的列中添加隔断线

from reportlab.lib.pagesizes import letter
from reportlab.platypus import SimpleDocTemplate, Table, TableStyle
from reportlab.lib import colors

import pandas as pd

# 创建一个示例数据帧
data = {'Name': ['John', 'Mike', 'Sarah'],
        'Age': [25, 30, 28],
        'City': ['New York', 'London', 'Paris']}
df = pd.DataFrame(data)

data_list = [df.columns.tolist()] + df.values.tolist()

doc = SimpleDocTemplate("grid.pdf", pagesize=letter)

table = Table(data_list)
table.setStyle(TableStyle([('BACKGROUND', (0, 0), (-1, 0), colors.grey),
                           ('TEXTCOLOR', (0, 0), (-1, 0), colors.whitesmoke),
                           ('ALIGN', (0, 0), (-1, -1), 'CENTER'),
                           ('FONTNAME', (0, 0), (-1, 0), 'Helvetica-Bold'),
                           ('FONTSIZE', (0, 0), (-1, 0), 14),
                           ('BOTTOMPADDING', (0, 0), (-1, 0), 12),
                           ('BACKGROUND', (0, 1), (-1, -1), colors.beige),
                           ('GRID', (0, 0), (-1, -1), 1, colors.black)]))

elements = []
elements.append(table)
doc.build(elements)