Mailman 3 June 2015 - docs

[issue24195] Add `Executor.filter` to concurrent.futures
by Ethan Furman June 8, 2015

June 8, 2015

Ethan Furman added the comment: The recipe creates a list before it ever starts processing, while Executor.filter() starts processing with the first item. ---------- _______________________________________ Python tracker <report(a)bugs.python.org> <http://bugs.python.org/issue24195> _______________________________________

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[issue24195] Add `Executor.filter` to concurrent.futures
by Ram Rachum June 8, 2015

June 8, 2015

Ram Rachum added the comment: Ethan: That's what I also thought, but then I figured that you're creating N futures anyway with an item attached to each, so it's on the same scale as creating a list, no? ---------- _______________________________________ Python tracker <report(a)bugs.python.org> <http://bugs.python.org/issue24195> _______________________________________

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[issue24195] Add `Executor.filter` to concurrent.futures
by Ethan Furman June 8, 2015

June 8, 2015

Ethan Furman added the comment: The recipe will work in simple situations. In more complex situations: - infinite iterator - really large iterator (millions of items) - high work load to produce next iteration the recipe will either have a severe impact on performance or fail entirely. ---------- _______________________________________ Python tracker <report(a)bugs.python.org> <http://bugs.python.org/issue24195> _______________________________________

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[issue24195] Add `Executor.filter` to concurrent.futures
by Brian Quinlan June 8, 2015

June 8, 2015

Brian Quinlan added the comment: Actually it immediately converts the iterable into a list. Recall: def filter(self, fn, iterable, timeout=None): l = list(iterable) # iterable => list return (item for (item, keep) in zip(l, self.map(fn, l, timeout)) if keep) ---------- _______________________________________ Python tracker <report(a)bugs.python.org> <http://bugs.python.org/issue24195> _______________________________________

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[issue20346] Argument Clinic: missing entry in table mapping legacy convertors to real AC converters
by Tal Einat June 8, 2015

June 8, 2015

Tal Einat added the comment: This patch was applied in changeset 57a27aae7836. ---------- resolution: duplicate -> fixed status: open -> closed _______________________________________ Python tracker <report(a)bugs.python.org> <http://bugs.python.org/issue20346> _______________________________________

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[issue24404] Python 2.7.0's BZ2File does not support with-statements
by Fabian June 8, 2015

June 8, 2015

New submission from Fabian: I had a weird bug recently where someone tried to use the with-statement on a BZ2File. According to the documentation it was added in 2.7 and looking at https://hg.python.org/cpython/rev/5d5d9074f4ca it looks like it was added together with the support in gzip. But after I've installed 2.7.0 I could use the with-statement on gzip but not in BZ2File: Python 2.7 (r27:82500, Jun 7 2015, 19:01:29) [GCC 4.8.3 20140911 (Red Hat 4.8.3-7)] on linux3 Type "help", "copyright", "credits" or "license" for more information. >>> import bz2 >>> with bz2.BZ2File('tests/data/xml/article-pyrus.xml.bz2') as f: ... c = f.read() ... Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: __exit__ So I've installed 2.7.1 and sure enough it works there: Python 2.7.1 (r271:86832, Jun 7 2015, 19:21:02) [GCC 4.8.3 20140911 (Red Hat 4.8.3-7)] on linux3 Type "help", "copyright", "credits" or "license" for more information. >>> import bz2 >>> with bz2.BZ2File('tests/data/xml/article-pyrus.xml.bz2') as f: ... c = f.read() ... >>> I guess the documentation needs be updated that since Python 2.7.1 BZ2File supports the with-statement. See also: https://phabricator.wikimedia.org/T101649 ---------- assignee: docs@python components: Documentation messages: 244962 nosy: docs@python, xZise priority: normal severity: normal status: open title: Python 2.7.0's BZ2File does not support with-statements versions: Python 2.7 _______________________________________ Python tracker <report(a)bugs.python.org> <http://bugs.python.org/issue24404> _______________________________________

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Small suggestion
by Payne＠mail.python.org June 7, 2015

June 7, 2015

1:43 pm Sun 7 Jun 2015 As I read the excellent Pythons documentation, I occasionally come across rhetorical constructions that might be improved. Here's one prom ython-2.7.10-docs-html/reference/simple_stmts.html#the-exec-statement The first expression should evaluate to either a Unicode string, a Latin-1 encoded string, an open file object, a code object, or a tuple. "Either" introduces *two* items, as in "either True or False ." In the sentence above it's used to introduce four items. It would be better to omit the "either" and say The first expression should evaluate to a Unicode string, a Latin-1 encoded string, an open file object, a code object, or a tuple. If the organization is interested in receiving further rhetorical suggestions, I will send them along. Payne Freret

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[issue24195] Add `Executor.filter` to concurrent.futures
by Ram Rachum June 6, 2015

June 6, 2015

Ram Rachum added the comment: A problem I just realized with Brian's 2-line implementation of `filter`: It doesn't work for iterables which aren't sequences, since it attempts to exhaust the iterable twice. So if you have a non-sequence you'll have to make it into a sequence first. ---------- _______________________________________ Python tracker <report(a)bugs.python.org> <http://bugs.python.org/issue24195> _______________________________________

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[issue24330] Idle doc: explain "Configure Idle" not in "Options" on OSX, etc.
by Terry J. Reedy June 5, 2015

June 5, 2015

Changes by Terry J. Reedy <tjreedy(a)udel.edu>: ---------- assignee: docs@python -> _______________________________________ Python tracker <report(a)bugs.python.org> <http://bugs.python.org/issue24330> _______________________________________

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[issue24330] Idle doc: explain "Configure Idle" not in "Options" on OSX, etc.
by Terry J. Reedy June 5, 2015

June 5, 2015

Changes by Terry J. Reedy <tjreedy(a)udel.edu>: ---------- assignee: -> docs@python components: +Documentation nosy: +docs@python title: "Configure Idle" not in "Options" -> Idle doc: explain "Configure Idle" not in "Options" on OSX, etc. _______________________________________ Python tracker <report(a)bugs.python.org> <http://bugs.python.org/issue24330> _______________________________________

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