[Tutor] Attribute.Error: 'list' object has no attribute strip

[vicki@stanfield.net]

Thanks for all the help with the listbox callback
stuff. Now onto something else. I am trying to use the
strip function on the data which is returned from a
getcurselection() call on that same listbox. What is
returned is in the following format (number will vary):

('06',)

I want to get only the number part, so I use the
following:

command=string.strip([(),])

The error I get is 

Attribute.Error: 'list' object has no attribute strip

I am including the string module. Can anyone tell me
what I am missing (this time)?

--vicki