Raymond Hettinger rhettin...@users.sourceforge.net added the comment:
Fixed in r86066, r86068 and r86069.
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resolution: - fixed
status: open - closed
versions: -Python 2.6
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Georg Brandl ge...@python.org added the comment:
from_iterable() was marked up wrongly in the itertools docs; this is fixed now
in r83230.
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Changes by Leonhard Vogt leonhard.v...@gmx.ch:
Removed file: http://bugs.python.org/file18223/functions.rst.patch4.txt
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Leonhard Vogt leonhard.v...@gmx.ch added the comment:
Thank you Georg, I updated the patch
Ezio, wouldn't start=0 in the signature imply that sum accepted a keyword
argument? I read Documenting Python (4.3) but am not sure about the
distinction of default values or keyword arbuments.
Łukasz Langa luk...@langa.pl added the comment:
The oldest interfaces tend to have quirks like that. Similar issue: #9379.
Won't be changed as well. I'm thinking of a better docstring though.
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Terry J. Reedy tjre...@udel.edu added the comment:
For Python functions, all arguments can be keyword arguments. For many
builtins, none can be (and maybe there should be a note to that effect at the
top of the built-in functions chapter). 'Param = default' merely means that the
parameter has
Łukasz Langa luk...@langa.pl added the comment:
For Python functions, all arguments can be keyword arguments. For many
builtins, none can be (and maybe there should be a note to that effect at the
top of the built-in functions chapter).
+1
Many Python users don't really grasp how builtins
Terry J. Reedy tjre...@udel.edu added the comment:
Please do. This issue comes up often enough on python-list. Make it a separate
doc issue, which will be auto-assigned to d...@python and add me as nosy.
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Terry J. Reedy tjre...@udel.edu added the comment:
I am puzzled that the fake name 'itertools.itertools.chain.from_iterable' works
better than the real name 'itertools.chain.from_iterable'. Some bug in the tool
chain?
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Leonhard Vogt leonhard.v...@gmx.ch added the comment:
another patch:
- moved string case to first position, i think it's the most important.
- reworded (shortened) list case.
- wrapped for 80 caracter lines.
still using itertools.itertools.chain.from_iterable as mentioned in previous
message.
Ezio Melotti ezio.melo...@gmail.com added the comment:
You could also use start=0 in the signature.
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Leonhard Vogt leonhard.v...@gmx.ch added the comment:
Thank you.
I think the specific list of list example is better for the sum documentation
because lists support the + operator. I don't think
that someone would consider using sum for chaining arbitrary iterables.
What about a concise To
Changes by Alexander Belopolsky belopol...@users.sourceforge.net:
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stage: needs patch - patch review
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Alexander Belopolsky belopol...@users.sourceforge.net added the comment:
A nitpick:
lol is a very well-known acronym and list of lists is not the expansion
that first comes to mind.
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Terry J. Reedy tjre...@udel.edu added the comment:
Leonard, that you for the patch, in particular, the list of hints. I think the
first is good but overly specific. It also has an extra '.itertools' in the
path. Now:
'''
+ - To concatenate a list of lists ``lol`` use
Georg Brandl ge...@python.org added the comment:
Note that using `~itertools.chain.from_iterable` is equivalent to
`from_iterable itertools.chain.from_iterable` and saves a repetition.
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Terry J. Reedy tjre...@udel.edu added the comment:
In order to have a chance at 2.6.6rc, due out in a week, I hand-edited the
patch, incorporating Georg's suggestion, and uploaded. I think it is ready to
commit.
Since this is not a critical doc fix, I am not marking it a blocker, but I
still
Alexander Belopolsky belopol...@users.sourceforge.net added the comment:
FWIW, I like the new patch better, but still have a few nitpicks:
- Starting a sentence with an argument name is a bit awkward because that makes
a sentence that starts with a lower case letter.
- There is an extra
Terry J. Reedy tjre...@udel.edu added the comment:
patch3 incorporates all your suggestions.
I verified the itertools hint:
list(itertools.chain.from_iterable([[10],[1,2],['a']]))
[10, 1, 2, 'a']
I think the hints are clear enough; anyone with more questions should follow
the link to the
Raymond Hettinger rhettin...@users.sourceforge.net added the comment:
I want to look at this more before it goes forward.
The docs are roughly correct as-is. In a effort
to make them precise, it is easy make them more
confusing or at least a bit harder to understand
the basic function of sum().
Leonhard Vogt leonhard.v...@gmx.ch added the comment:
I changed the documentation regarding string not allowed as start argument and
performance
I included the list concatenation with itertools.chain from
http://groups.google.com/group/comp.lang.python/msg/33e764d0ac41826a
patch is based on
Ezio Melotti ezio.melo...@gmail.com added the comment:
There are also a couple more things that could be improved in the
documentation of sum():
1) add a note about the performance trap mentioned by Alex [1]
2) remove the reduce() example because, even if it's true for that
particular example,
Changes by Raymond Hettinger rhettin...@users.sourceforge.net:
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assignee: georg.brandl - rhettinger
nosy: +rhettinger
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New submission from Terry J. Reedy tjre...@udel.edu:
sum(iterable[, start])
Sums start and the items of an iterable from left to right and returns
the total. start defaults to 0. The iterable‘s items are normally
numbers, and are not allowed to be strings.
The last sentence is not currently
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