python对列表中的数值进行统计运算_利用Python进行数据分析-07-汇总和计算描述统计...
1、sum函数df = pd.DataFrame([[1.4,np.nan],[7.1,-4.5],[np.nan,np.nan],[0.75,-1.3]],index = ['a','b','c','d'],columns = ['one','two'])dfOut[6]:one twoa1.40NaNb7.10 -4.5c NaN NaNd0.75 -1.3df.sum()Out[7]...