# ------------------------------------------------------------

 'python式的切片，包含为尾位置'

 In [23]:df = pd.DataFrame({

             'http_status': [200,200,404,404,301],

             'response_time': [0.04, 0.02, 0.07, 0.08, 1.0]},

             index=[0,1,2,3,4])

 In [26]:df[1:3]

 Out[26]:

    http_status  response_time

 1          200           0.02

 2          404           0.07

 In [24]:df.iloc[1:3,:]

 Out[24]:

    http_status  response_time

 1          200           0.02

 2          404           0.07

 In [28]:df.values[1:3,:]

 Out[28]:

 array([[  2.00000000e+02,   2.00000000e-02],

        [  4.04000000e+02,   7.00000000e-02]])

 # ------------------------------------------------------------

 'matlab式的切片，包含尾位置'

 In [29]:df.ix[1:3,:]

 Out[29]:

    http_status  response_time

 1          200           0.02

 2          404           0.07

 3          404           0.08