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我有一个从Python的Pandas包生成的数据帧.如何使用pandas包中的DataFrame生成热图.

import numpy as np 
from pandas import *

Index= ['aaa','bbb','ccc','ddd','eee']
Cols = ['A', 'B', 'C','D']
df = DataFrame(abs(np.random.randn(5, 4)), index= Index, columns=Cols)

>>> df
          A         B         C         D
aaa  2.431645  1.248688  0.267648  0.613826
bbb  0.809296  1.671020  1.564420  0.347662
ccc  1.501939  1.126518  0.702019  1.596048
ddd  0.137160  0.147368  1.504663  0.202822
eee  0.134540  3.708104  0.309097  1.641090
>>>