xlwt写入excel时候的合并单元格

import xlwt
workbook = xlwt.Workbook()
worksheet = workbook.add_sheet('My sheet')
# 合并第0行的第0列到第3列。
worksheet.write_merge(0, 0, 0, 3, 'First Merge')
worksheet.write_merge(1, 2, 0, 3, 'Second Merge', style) 
worksheet.write_merge(4, 6, 3, 6, 'My merge', style)

#worksheet.write_merge(开始行,结束行, 开始列, 结束列, 'My merge', style)