from pandas import Series,DataFrameimport pandas as pdimport numpy as nppython中pandas.DataFrame对行与列求和及添加新行与列示例
df = DataFrame(np.random.randn(4, 5), columns=[‘A‘, ‘B‘, ‘C‘, ‘D‘, ‘E‘])df[‘Col_sum‘] = df.apply(lambda x: x.sum(), axis=1)df.loc[‘Row_sum‘] = df.apply(lambda x: x.sum())原文：http://www.cnblogs.com/bawu/p/7206326.html