Trailing comma

[Lulu of the Lotus-Eaters]

Skip Montanaro <skip at pobox.com> wrote previously:
|if the list is not a list of string constants there's no real harm in
|omitting it either, because if you extend or reorder the list and forget to
|insert a comma in the right place you'll get a SyntaxError

Not necessarily:

    >>> x = [1,
    ...      -4,
    ...      +5
    ...      -2,
    ...      7]
    >>> x
    [1, -4, 3, 7]

Which makes the point even stronger, however.

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