problem with function

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From	leonardo selmi <l.selmi@icloud.com>
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Subject	problem with function
Date	Thu, 21 Mar 2013 19:31:47 +0100
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hi all,

i wrote the following code:

def find(word, letter):
    index = 0
    while index < len(word):
        if word[index] == letter:
            return index
        index = index + 1
    return -1

if i run the program i get this error: name 'word' is not defined.  how can i solve it?

thanks!

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problem with function leonardo selmi <l.selmi@icloud.com> - 2013-03-21 19:31 +0100
  Re: problem with function "Alex" <foo@email.invalid> - 2013-03-21 20:11 +0000

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