Josiah Carlson <[EMAIL PROTECTED]> wrote:
> > pitfall of Python is knowing whether an operation is destructive or not.
>
> If it returns None, it probably changes the content of an object.
A reasonable heuristic, but with lots of exceptions, alas:
somedict.get(somekey)
will often return None without performing any change, while
somelist.pop()
does modify somelist but typically returns non-None.
The use of trailing-exclamation-point (by convention) to indicate
"mutating methods" is a nice plus in languages that allow it.
Alex
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