Count, index out of range [closed]

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I have this code to return a number but I get the error: IndexError: index out of range: 0 with the return.

nbus=1

users = []

for i in range(nb):

    ind = (int(nbus)-1)

ind= ind +1 

return users[ind]

Do you know why?

Thanks

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You never append to users, therefore it contains no elements and has no valid indexes.