Dražen Lučanin added the comment:
Yes, sure, I agree with both comments. Fors are a bit disambiguous in
this context in comparison to while loops. But something in the style
of Ezio's explanation might come in handy in the error output.
e.g.
SyntaxError: invalid syntax. "," or ")" expected in the argument list
of the method append, but ':' found instead.
(or the equivalent that's possible on that syntactic tree level)
Something that might explain that it's some sort of list being parsed,
not a for-loop command. It would point the coder in the right
direction, speeding him up.
This would all be a bit simpler if an indent was obligatory after
inserting a newline in the middle of a command. Then this would pass
OK
things.append('c'
for a in things)
while this would fail
things.append('c'
for a in things)
with a syntax error on the first line, because the second line
would've been interpreted as a new command, not a continuation of the
first one.
I don't know if something like that would be possible, due to some
other aspects, though...
On Thu, Jan 10, 2013 at 3:23 PM, Mark Dickinson <rep...@bugs.python.org> wrote:
>
> Mark Dickinson added the comment:
>
>> The error is in a missing parenthesis after the append call
>
> Well, that's one *possible* cause of the error. But fixing that missing
> parenthesis isn't the only way to make the code correct, and Python doesn't
> have any reasonable way to guess which of the various possible errors you
> made or what you intended to write. For example, the following is valid code:
>
> things = ['a', 'b']
> things.append('c'
> for a in things)
>
> ----------
> nosy: +mark.dickinson
>
> _______________________________________
> Python tracker <rep...@bugs.python.org>
> <http://bugs.python.org/issue16917>
> _______________________________________
----------
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue16917>
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