Generating a simple heatmap w/ python

heatmap1.py

import numpy as np
from pandas import *
import matplotlib.pyplot as plt

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

plt.pcolor(df)
plt.yticks(np.arange(0.5, len(df.index), 1), df.index)
plt.xticks(np.arange(0.5, len(df.columns), 1), df.columns)

plt.show()