df.iloc[[1,2,4],[0,2]]

A C

2013-01-02 0.985261 0.481214

2013-01-03 0.104701 0.812034

2013-01-05 0.079194 0.907441

df.loc['20130102':'20130105',['A','C']]

A C

2013-01-02 0.985261 0.481214

2013-01-03 0.104701 0.812034

2013-01-04 0.252073 0.063743

2013-01-05 0.079194 0.907441

#对于明确切片行：

df.iloc[1:3,:]

A B C D

2013-01-02 0.985261 0.017241 0.481214 0.53897

2013-01-03 0.104701 0.647015 0.812034 0.47709

#对于明确切片列

df.iloc[:,1:3]

B C

2013-01-01 0.354072 0.741003

2013-01-02 0.017241 0.481214

2013-01-03 0.647015 0.812034

2013-01-04 0.862004 0.063743

2013-01-05 0.779128 0.907441

2013-01-06 0.906111 0.093382

#明确获取值

df.iloc[1,1]

0.017240653700656305