1. 加载excel文件，设置单元格值，设置字体

from openpyxl.cell import Cell
from openpyxl.styles import Font
from openpyxl.worksheet.worksheet import Worksheet
from openpyxl import Workbook, load_workbook
wb: Workbook = load_workbook(file)
# 获取第一个sheet页
sheet: Worksheet = wb[wb.sheetnames[0]]
# 获取最大列数
max_col = sheet.max_column
# 设置单元格的值
cell: Cell = sheet.cell(1, max_col + 1, "aaaa")
# 设置字体
cell.font = Font(size=12, bold=True, color="FF0000")