pandas Dataframe 取某行

In [1]: df = DataFrame(randn(5,2),index=range(0,10,2),columns=list('AB'))

In [2]: df
Out[2]:
          A         B
0  1.068932 -0.794307
2 -0.470056  1.192211
4 -0.284561  0.756029
6  1.037563 -0.267820
8 -0.538478 -0.800654

In [5]: df.iloc[[2]]
Out[5]:
          A         B
4 -0.284561  0.756029

In [6]: df.loc[[2]]
Out[6]:
          A         B
2 -0.470056  1.192211

一个是按照index的序值. 一个是按照index的具体值.