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']) df Out[6]: one two a 1.40 NaN b 7.10 -4.5 c NaN NaN d 0

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