In [1]: df = DataFrame(randn(5,2),index=range(0,10,2),columns=list('AB'))In [2]: dfOut[2]:           A         B0  1.068932 -0.7943072 -0.470056  1.1922114 -0.284561  0.7560296  1.037563 -0.2678208 -0.538478 -0.800654In [5]: df.iloc[[2]]Out[5]:           A         B4 -0.284561  0.756029In [6]: df.loc[[2]]Out[6]:           A         B2 -0.470056  1.192211

 

一个是按照index的序值. 一个是按照index的具体值.