'''判断是否为空表格''' 根据长度 obj_.df4.shape[0] 根据pd.isnull之和 pd.isnull(obj_.df4).sum().sum() 根据isnaisnull之和 obj_.df4.isna().sum().sum() 参考文献 Pandas的isna()vsisnull()vsnumpy.isnan()有什么区别? https://blog.csdn.net/htuhxf/article/details/89525441 https://www.r-bloggers.com/2010/04/r-na-vs-null/