python pandas index is_unique not working
Question: I'm new to python so please call me on not including relevant information.

I've installed python, ipython, and am using the notebook on an Ubuntu
installation in a VM.

I'm working through examples laid out in Wes McKinney's Python for Data
Analysis. After the following import statements:

    
    
    from pandas import Series, DataFrame
    import pandas as pd
    

I defined a dataframe with:

    
    
    series1 = Series(range(5), index=['a', 'a', 'b', 'b', 'c'])
    

And subsequently wanted to test the indexes uniqueness with:

    
    
    series1.index.is_unique
    

And get this error:

    
    
    ---------------------------------------------------------------------------
    AttributeError                            Traceback (most recent call last)
    /home/username/<ipython-input-64-e42615bb2da2> in <module>()
    ----> 1 series1.index.is_unique
    AttributeError: 'Index' object has no attribute 'is_unique'
    

The book indicates this attribute exists. Other stackoverflow questions and
answers reference this attribute.

What am I doing wrong?

Thanks

After being asked what version of pandas I was using, I checked and it was
0.7.0 Upgrading with

    
    
    pip install --upgrade pandas
    

Got me where I needed to be.


Answer: Make sure you are using an updated version, no issues here with `0.11.0`:

    
    
    >>> from pandas import Series, DataFrame
    >>> s = Series(range(5), index=['a', 'a', 'b', 'b', 'c'])
    >>> s.index.is_unique
    False
    

Either download the most recent version from
[here](https://pypi.python.org/pypi/pandas#downloads), or upgrade from command
line:

    
    
    pip install --upgrade pandas
    

For this snippet there's no need to `import pandas as pd` on the second line,
so I've removed it.

