[pymvpa] Name Error of attrs in the example data set

[Yune S. Lee]

 Dear pyMVPA experts,
 I'm a total newbie for the pyMVPA and just started exploring it with 
the example dataset.
 After downloading and extracting the Haxby's file, I just typed the 
first line exactly same as it says in the tutorial as follows

 attrs= SampleAttributes('data./attributes_literal.txt',literallabels=True)

 However, python spits out the error message as follows

 NameError
 /home/yune/<ipython console> in <module>()
NameError : name 'SampleAttributes' is not defined.

 Can anyone tell me what was wrong with it? should I import pyMVPA 
module before typing it?
 Any help would be greatly appreciated.

 thanks,
 YSL