En Mon, 06 Jul 2009 00:28:43 -0300, Steven D'Aprano
<st...@remove-this-cybersource.com.au> escribió:
On Mon, 06 Jul 2009 14:32:46 +1200, Lawrence D'Oliveiro wrote:
I wonder how many people have been tripped up by the fact that
++n
and
--n
fail silently for numeric-valued n.
What do you mean, "fail silently"? They do exactly what you should
expect:
++5 # positive of a positive number is positive
I'm not sure what "bug" you're seeing. Perhaps it's your expectations
that are buggy, not Python.
Well, those expectations are taken seriously when new features are
introduced into the language - and sometimes the feature is dismissed just
because it would be confusing for some.
If a += 1 works, expecting ++a to have the same meaning is very reasonable
(for those coming from languages with a ++ operator, like C or Java) -
more when ++a is a perfectly valid expression.
If this issue isn't listed under the various "Python gotchas" articles, it
should...
--
Gabriel Genellina
--
http://mail.python.org/mailman/listinfo/python-list
