Since tuples are immutable, you can't replace 'bye' with 'goodbye'. At best, you can create a new tuple and reassign it:

stuff = ('hello', 'world', 'goodbye', 'now')

stuff = stuff[0:2] + ('goodbye', stuff[3])

stuff = list(stuff)
stuff[2] = 'goodbye'
stuff = tuple(stuff)

Solution 1 creates an entirely new tuple with the changed value. That's not quite in the spirit of what we're asking. It would also be tedious if the tuple contained more than a few elements.

Solution 2 is a little closer to being in the proper spirit. This one concatenates a slice of the original tuple combined with a new tuple that includes 'goodbye' and 'now' (from stuff[3]). However, that code is difficult to read. Furthermore, the slicing and indexing is a sure-fire way to get an off-by-one error. For example, if you wrote stuff[0:1] instead of stuff[0:2], the result would be missing 'world'.

Solution 3 is as close as we can get to the spirit of the problem. Here, we convert the original tuple to a list and reassign the element to the new value. Finally, we transform the list into a new tuple. This approach still creates an entirely new tuple. However, it avoids the problem of re-entering a long list of members, is cleaner than slicing and indexing, and is much easier to read.

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