DataFrame

import pandas as pd

data = {'state': ['Ohio', 'Ohio', 'Ohio', 'Nevada', 'Nevada'],'year': [2000, 2001, 2002, 2001, 2002],'pop': [1.5, 1.7, 3.6, 2.4, 2.9]}
# 建立DataFrame对象
frame1 = pd.DataFrame(data)

In [73]: frame1
Out[73]: 
   pop   state  year
0  1.5    Ohio  2000
1  1.7    Ohio  2001
2  3.6    Ohio  2002
3  2.4  Nevada  2001
4  2.9  Nevada  2002

在建立过程中可以指点列的顺序：
frame1 = pd.DataFrame(data,columns=['year', 'state', 'pop'])
frame1

In [75]: frame1
Out[75]: 
   year   state  pop
0  2000    Ohio  1.5
1  2001    Ohio  1.7
2  2002    Ohio  3.6
3  2001  Nevada  2.4
4  2002  Nevada  2.9

和Series一样，DataFrame也是可以指定索引内容：
In [76]: ind = ['one', 'two', 'three', 'four', 'five']
In [77]: frame1 = DataFrame(data,index = ind)

In [78]: frame1
Out[78]: 
       pop   state  year
one    1.5    Ohio  2000
two    1.7    Ohio  2001
three  3.6    Ohio  2002
four   2.4  Nevada  2001
five   2.9  Nevada  2002