我想将此数据框转换为列表列表
Year Sales Expenses Profit
2014 1000 400 200
2015 1170 460 250
2016 660 1120 300
2017 1030 540 350
这是预期的输出
[
['Year','Sales','Expenses','Profit'],['2014',1000,400,200],['2015',1170,460,250],['2016',660,1120,300],['2017',1030,540,350]
]