Pandas error: 'DataFrame' object has no attribute 'loc'

I am new to pandas and is trying the Pandas 10 minute tutorial with pandas version 0.10.1. However when I do the following, I get the error as shown below. print df works fine.

Why is .loc not working?

Code

import numpy as np
import pandas as pd

df = pd.DataFrame(np.random.randn(6,4), index=pd.date_range('20130101', periods=6), columns=['A','B','C','D'])
df.loc[:,['A', 'B']]

Error:

AttributeError                            Traceback (most recent call last)
<ipython-input-4-8513cb2c6dc7> in <module>()
----> 1 df.loc[:,['A', 'B']]

C:\Python27\lib\site-packages\pandas\core\frame.pyc in __getattr__(self, name)
   2044             return self[name]
   2045         raise AttributeError("'%s' object has no attribute '%s'" %
-> 2046                              (type(self).__name__, name))
   2047 
   2048     def __setattr__(self, name, value):

AttributeError: 'DataFrame' object has no attribute 'loc'

Solution

loc was introduced in 0.11, so you'll need to upgrade your pandas to follow the 10minute introduction.