pandas实现选取特定索引的行

>>> import numpy as np

>>> import pandas as pd

>>> index=np.array([2,4,6,8,10])

>>> data=np.array([3,5,7,9,11])

>>> data=pd.DataFrame({'num':data},index=index)

>>> print(data)

  num

2   3

4   5

6   7

8   9

10  11

>>> select_index=index[index>5]

>>> print(select_index)

[ 6 8 10]

>>> data['num'].loc[select_index]

6   7

8   9

10  11

Name: num, dtype: int32

>>>

>>> data['num'].iloc[2:5]

6   7

8   9

10  11

Name: num, dtype: int32

>>> data['num'].iloc[[2,3,4]]

6   7

8   9

10  11

Name: num, dtype: int32

>>>