[issue17023] Subprocess does not find executable on Windows if it is PATH with quotes
Changes by Eli_B eli.boyar...@gmail.com: -- nosy: +Eli_B ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17023 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: basic generator question
Neal Becker wrote:
I have an object that expects to call a callable to get a value:
class obj:
def __init__ (self, gen):
self.gen = gen
def __call__ (self):
return self.gen()
As written, there is no need for this obj class, it just adds a pointless
layer of indirection. Perhaps it was written by a Java programmer?
http://steve-yegge.blogspot.com.au/2006/03/execution-in-kingdom-of-nouns.html
Instead of:
x = obj(something_callable)
# later
result = x()
just do:
x = something_callable
result = x()
or even
result = something_callable()
Now I want gen to be a callable that repeats N times.
What happens on the sixth time? The world ends? Most callables can be called
indefinitely.
I'm going to assume an exception. Later I'll use a RuntimeException, but you
can do anything you like.
I'm thinking, this sounds perfect for yield
class rpt:
def __init__ (self, value, rpt):
self.value = value; self.rpt = rpt
def __call__ (self):
for i in range (self.rpt):
yield self.value
so I would do:
my_rpt_obj = obj (rpt ('hello', 5))
to repeat 'hello' 5 times (for example).
But this doesn't work. when obj calls self.gen(), that returns a
generator, not the next value.
How can I make this work? I can't change the interface of the existing
class obj, which expects a callable to get the next value.
The built-in function `next` almost does what we want, except the exception
raised is inappropriate. Unless you are very careful, you don't want to
allow StopIteration to propagate, lest it be caught in an unexpected place
and cause surprises. (Not the pleasant kind.)
py from functools import partial
py f = partial(next, rpt(hello, 2)()) # note the extra parens
py f()
'hello'
py f()
'hello'
py f()
Traceback (most recent call last):
File stdin, line 1, in module
StopIteration
But I wouldn't use rpt as given. I'd say:
def repeat(obj, count):
for i in range(count):
yield obj
raise RuntimeError # or whatever
mycallable = partial(next, repeat(hello, 5)) # no extra parens
And now pass mycallable to your other class.
P.S. your naming conventions give me a blood clot. Class rpt taking an
argument rpt -- I lost six months of life just from reading that.
--
Steven
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[issue18932] Optimize selectors.EpollSelector.modify()
STINNER Victor added the comment: Here is a patch: Issue #18932, selectors: Optimize the modify() method of selectors Optimize also register() and unregister() methods of KqueueSelector: only call kqueue.control() once. -- keywords: +patch Added file: http://bugs.python.org/file38014/selectors_optimize_modify.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18932 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: meaning of: line, =
On 02/04/2015 07:04 AM, Chris Angelico wrote: On Thu, Feb 5, 2015 at 1:38 AM, Albert-Jan Roskam fo...@yahoo.com wrote: I have also never seen this before, but perhaps this: f = lambda: [42] result, = f() result 42 ... is slightly cleaner than this: result = f()[0] result 42 They're not technically identical. If the thing returned is subscriptable (as with your list example), then I would definitely subscript it rather than unpacking; By unpacking you are also double checking that the returned iterable contains exactly one item; more or less will cause an exception -- you only get half that check if you index. -- ~Ethan~ signature.asc Description: OpenPGP digital signature -- https://mail.python.org/mailman/listinfo/python-list
[issue18932] Optimize selectors.EpollSelector.modify()
STINNER Victor added the comment: I tested SelectSelector, PollSelector, EpollSelector on Linux. I ran tests on FreeBSD, so also tested KqueueSelector. I didn't test DevpollSelector, but the code should be identical to PollSelector (the API is the same). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18932 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
pymongo and attribute dictionaries
I really like pymongo. And I really like Python. But one thing my fingers really get tired of typing is someDoc[‘_’id’] This just does not roll of the fingers well. Too many “reach for modifier keys” in a row. I would rather use someDoc._id Googling shows that I’m not the first to want to do this in the general sense (e.g. http://stackoverflow.com/questions/4984647/accessing-dict-keys-like-an-attribute-in-python). Arguments aside of whether this should or shouldn’t be done, I want to know how I might solve this with Python. Consider it an academic pursuit. The problem I have is not how to do the AttributeDictionary subclass, there are plenty of those examples. The problem is that the pymongo APIs already return dictionaries. In a language (Smalltalk, Objective-C, Ruby) that supports class extensions, that would be my first tool of choice to solve this problem. I’d just extend Dictionary to behave the way I want and be done with it. I can’t do that in Python though. I guess I could make my own module that subclasses the relevant pymongo classes, and do super() calling implementations of all of the relevant methods, coercing the return type. That is a maintenance headache though. What are my options, if any? -- https://mail.python.org/mailman/listinfo/python-list
Re: basic generator question
On Wed, Feb 4, 2015 at 6:23 AM, Neal Becker ndbeck...@gmail.com wrote:
class rpt:
def __init__ (self, value, rpt):
self.value = value; self.rpt = rpt
def __call__ (self):
for i in range (self.rpt):
yield self.value
Note that this class is just reimplementing itertools.repeat.
list(itertools.repeat('hello', 5))
['hello', 'hello', 'hello', 'hello', 'hello']
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[issue19017] selectors: towards uniform EBADF handling
STINNER Victor added the comment: Guido wrote: This still leaves case (1), where the FD is already bad when we register it. I am actually fine with sometimes raising and sometimes not; I don't want to pay the extra overhead of doing an fstat() or some other syscall just to verify that it is valid. (Although this would make the argument about wanting to choose a selector class that doesn't make extra syscalls less compelling. :-) And neither do I want to ignore the error in register() and pretend success. The asyncio has a debug mode which can execute expensive checks. These checks would not be acceptable in release mode since they are an impact on performances. In debug mode, asyncio can explicitly call fstat() before calling selector.register() or selector.modify(). This solution may be suggested in the documentation if someone wants a portable behaviour for all selector. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue19017 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18932] Optimize selectors.EpollSelector.modify()
Giampaolo Rodola' added the comment: _BaseSelectorImpl.modify() still calls unregister() and register(). To my understanding the whole point of this proposal was to avoid that in order to obtain the speedup and (possibly) avoid race conditions. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18932 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: pymongo and attribute dictionaries
On Wed, Feb 4, 2015 at 9:50 AM, Travis Griggs travisgri...@gmail.com wrote:
I really like pymongo. And I really like Python. But one thing my fingers
really get tired of typing is
someDoc[‘_’id’]
This just does not roll of the fingers well. Too many “reach for modifier
keys” in a row. I would rather use
someDoc._id
Googling shows that I’m not the first to want to do this in the general sense
(e.g.
http://stackoverflow.com/questions/4984647/accessing-dict-keys-like-an-attribute-in-python).
Arguments aside of whether this should or shouldn’t be done, I want to know
how I might solve this with Python. Consider it an academic pursuit.
The problem I have is not how to do the AttributeDictionary subclass, there
are plenty of those examples. The problem is that the pymongo APIs already
return dictionaries. In a language (Smalltalk, Objective-C, Ruby) that
supports class extensions, that would be my first tool of choice to solve
this problem. I’d just extend Dictionary to behave the way I want and be done
with it. I can’t do that in Python though. I guess I could make my own module
that subclasses the relevant pymongo classes, and do super() calling
implementations of all of the relevant methods, coercing the return type.
That is a maintenance headache though.
What are my options, if any?
You could construct the AttributeDictionary by copying the dict
returned from pymongo. The question then is whether the copying would
be too expensive or not.
Alternately, you could just wrap the dictionaries returned by pymongo
in an object. Something like this should be all you need:
class AttrDictWrapper(object):
def __init__(self, the_dict):
self.__dict__ = the_dict
d = AttrDictWrapper({'spam': 42, 'ham': False})
d.spam
42
d.ham
False
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Re: meaning of: line, =
Rustom Mody wrote: Well its cryptic and confusing (to me at least) And is helped by adding 2 characters: (result,) = f() instead of result, = f() Another alternative is to put a list literal on the lefthand side: def f(): yield 42 ... [result] = f() result 42 (If you're worried: neither the list nor the tuple will be created; the bytecode is identical in both cases) -- https://mail.python.org/mailman/listinfo/python-list
[issue23389] pkgutil.find_loader raises an ImportError on PEP 420 implicit namespace packages
Changes by Brett Cannon br...@python.org: -- nosy: +brett.cannon ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23389 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue19017] selectors: towards uniform EBADF handling
STINNER Victor added the comment:
To find an invalid FD when select() fails with EBAD, we can use something
like:
http://ufwi.org/projects/nufw/repository/revisions/b4f66edc5d4dc837f75857f8bffe9015454fdebc/entry/src/nuauth/tls_nufw.c#L408
Oh, the link is dead. Copy/paste of the code:
---
/* errno == EBADF */
int i;
/* A client disconnects between FD_SET and select.
* Will try to find it */
for (i=0; icontext-mx; ++i){
struct stat s;
if (FD_ISSET(i, context-tls_rx_set)){
if (fstat(i, s)0) {
log_message(CRITICAL, DEBUG_AREA_USER,
Warning: %d is a bad file descriptor., i);
FD_CLR(i, context-tls_rx_set);
}
}
}
continue; /* retry select */
---
In short: call fstat() if check if the FD is valid or not. O(n) complexity.
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[issue23390] make profile-opt: test_distutils failure
Changes by Gregory P. Smith g...@krypto.org: -- assignee: - gregory.p.smith ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23390 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23383] Clean up bytes formatting
Serhiy Storchaka added the comment: Thanks to Martin's suggestions here is even more clean patch. -- Added file: http://bugs.python.org/file38011/bytes_format_2.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23383 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
PSF Python Brochure sold out - help us kick start the second print run !
[Please help spread the word by forwarding to other relevant mailing lists, user groups, etc. world-wide; thanks :-)] *** PSF Python Brochure sold out *** Please help us kick start the second print run ! http://brochure.getpython.info/ You can also read this posting online at: http://pyfound.blogspot.de/2015/02/psf-python-brochure-sold-out-help-us.html First print run distributed to the community We are happy to announce that we have successfully distributed the first 5,000 copies of the PSF Python Brochure to Python conferences and user groups around the world: PSF Python Brochure Vol. 1 http://brochure.getpython.info/brochure-vol1.pdf Even without doing any major announcement of the possibility to order the brochure for conferences and user groups, we easily received enough requests to have the first print run completely distributed in just a few months. Brochures were sent to PyCon US 2014 in Montreal, EuroPython 2014, PyCons and open source conferences in India, UK, South Africa, Australia, New Zealand, France, Belgium and to many professional users around the world. Promoting Python to new audiences The feedback we received was positive all around. Conference attendees were really happy to be able to easily show and prove how Python changes the world, to make the point that learning and using Python is a good investment. The brochure helps them in promoting Python in their local and professional communities, especially to the many non-technical people we cannot easily reach with our python.org web site. We would like to thank all our sponsors and contributors for their hard work to achieve this impressing result. Learn more about the project http://brochure.getpython.info/learn-more Please help us kick start the second print run ! In order to continue with the distribution of the remaining 5,000 copies of the Vol. 1 edition, we are now looking for two additional half page ad sponsors to help finance the print run and distribution costs. We have reserved the notes area on the inner back cover page of the brochure for these extra ads. If you would like to show your support for Python and its community and reach out to thousands of people interested in Python, now is the time to sign up as ad sponsor! Sign up as ad sponsor http://brochure.getpython.info/ Pre-order the PSF Python Brochure We provide two options for pre-ordering the brochure from the second print run which will be available early in April 2015: * free Community Orders for conference and user groups * paid Company Orders for companies and organizations The costs for the community orders are sponsored through sponsor ads, the PSF and the company orders. Place your pre-order http://brochure.getpython.info/ More information More information on the brochure, the idea and people behind it, media data and ordering links are available on our project page: PSF Python Brochure Project Website http://brochure.getpython.info/ Thank you for your help, -- Marc-Andre Lemburg Director Python Software Foundation http://www.python.org/psf/ -- https://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations/
Re: Cairo module
Hi Poul, I recently used cairo in a python project (https://github.com/luismqueral/jumpcityrecords). To see the cairo drawing directly on the screen I wrote a minimal Gtk application. It's in the 'src' directory and is called 'randomdraw.py'. Maybe it is of some help to you. Greetings, -- You can't actually make computers run faster, you can only make them do less. - RiderOfGiraffes -- https://mail.python.org/mailman/listinfo/python-list
PSF Python Brochure sold out - help us kick start the second print run !
[Please help spread the word by forwarding to other relevant mailing lists, user groups, etc. world-wide; thanks :-)] *** PSF Python Brochure sold out *** Please help us kick start the second print run ! http://brochure.getpython.info/ You can also read this posting online at: http://pyfound.blogspot.de/2015/02/psf-python-brochure-sold-out-help-us.html First print run distributed to the community We are happy to announce that we have successfully distributed the first 5,000 copies of the PSF Python Brochure to Python conferences and user groups around the world: PSF Python Brochure Vol. 1 http://brochure.getpython.info/brochure-vol1.pdf Even without doing any major announcement of the possibility to order the brochure for conferences and user groups, we easily received enough requests to have the first print run completely distributed in just a few months. Brochures were sent to PyCon US 2014 in Montreal, EuroPython 2014, PyCons and open source conferences in India, UK, South Africa, Australia, New Zealand, France, Belgium and to many professional users around the world. Promoting Python to new audiences The feedback we received was positive all around. Conference attendees were really happy to be able to easily show and prove how Python changes the world, to make the point that learning and using Python is a good investment. The brochure helps them in promoting Python in their local and professional communities, especially to the many non-technical people we cannot easily reach with our python.org web site. We would like to thank all our sponsors and contributors for their hard work to achieve this impressing result. Learn more about the project http://brochure.getpython.info/learn-more Please help us kick start the second print run ! In order to continue with the distribution of the remaining 5,000 copies of the Vol. 1 edition, we are now looking for two additional half page ad sponsors to help finance the print run and distribution costs. We have reserved the notes area on the inner back cover page of the brochure for these extra ads. If you would like to show your support for Python and its community and reach out to thousands of people interested in Python, now is the time to sign up as ad sponsor! Sign up as ad sponsor http://brochure.getpython.info/ Pre-order the PSF Python Brochure We provide two options for pre-ordering the brochure from the second print run which will be available early in April 2015: * free Community Orders for conference and user groups * paid Company Orders for companies and organizations The costs for the community orders are sponsored through sponsor ads, the PSF and the company orders. Place your pre-order http://brochure.getpython.info/ More information More information on the brochure, the idea and people behind it, media data and ordering links are available on our project page: PSF Python Brochure Project Website http://brochure.getpython.info/ Thank you for your help, -- Marc-Andre Lemburg Director Python Software Foundation http://www.python.org/psf/ -- https://mail.python.org/mailman/listinfo/python-list
[issue23393] [Windows] Unable to link with Python in debug configuration
Steve Dower added the comment: It's not supported. You'll need to get the Python 2.7 source code and rebuild the binaries under Debug. Python 3.5 will probably have the option to download and install debug versions of the binaries, but Python 2.7 won't be getting this. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23393 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23376] getargs.c: redundant C-contiguity check
Serhiy Storchaka added the comment: See also contiguity tests in Modules/binascii.c and Modules/_ssl.c, -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23376 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22963] broken link in PEP 102
Ezio Melotti added the comment: Ok, so I'm closing this again. Berker, can you add a link to this issue too on the pydotorg tracker? -- status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22963 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17023] Subprocess does not find executable on Windows if it is PATH with quotes
Tim Golden added the comment: Under the covers, subprocess is calling CreateProcess so there's really not very much we can do here, short of writing our own PATH-handling. As a matter of fact, passing shell=True will produce the desired effect. Since the only thing this does is to run the process under cmd.exe I assume that cmd.exe itself adds some kind of PATH handling of its own. I recommend closing as won't fix. -- assignee: - tim.golden components: +Windows nosy: +steve.dower, tim.golden, zach.ware ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17023 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23264] Add pickle support of dict views
Serhiy Storchaka added the comment: Thanks Antoine. Do you have objections Raymond? I'm going to provide similar patch for MappingView. More robust tests in updated patch. -- assignee: - serhiy.storchaka Added file: http://bugs.python.org/file38015/pickle_dictviews_2.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23264 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23393] [Windows] Unable to link with Python in debug configuration
New submission from Sébastien Gallou: Hi all, I installed Python (2.7.9) as binaries under Windows. I have trouble trying to compile my application embedding Python, in debug configuration. I have exactly the same problem as described here : http://www.cmake.org/pipermail/cmake/2013-January/053125.html The include file python.h selects automaticaly the library file to link with, but python27_d.lib (needed in debug configuration) is not provided by the installer. I don't find if this issue was already supported. Thanks, Sébastien Gallou -- components: Build, Library (Lib), Windows messages: 235397 nosy: sgallou, steve.dower, tim.golden, zach.ware priority: normal severity: normal status: open title: [Windows] Unable to link with Python in debug configuration type: compile error versions: Python 2.7 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23393 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22995] Restrict default pickleability
Changes by Serhiy Storchaka storch...@gmail.com: -- nosy: +nadeem.vawda ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22995 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18932] Optimize selectors.EpollSelector.modify()
Charles-François Natali added the comment: Well, I'd like to see at least one benchmark. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18932 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23393] [Windows] Unable to link with Python in debug configuration
Sébastien Gallou added the comment: Thanks Steve for your quick answer. It's now clear for me. I will then apply this workaround : #ifdef PYTHON_USE_SOURCES #include Python.h #else #if defined WIN32 defined _DEBUG #undef _DEBUG // Undef _DEBUG to use only release version of Python.lib. The debug version of Python.lib is not provided with the Windows installer version (https://www.python.org/downloads/windows/) #include Python.h #define _DEBUG #else #include Python.h #endif #endif // PYTHON_USE_SOURCES Sébastien Gallou -- resolution: - not a bug status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23393 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue20289] Make cgi.FieldStorage a context manager
Serhiy Storchaka added the comment: Ping. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue20289 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23393] [Windows] Unable to link with Python in debug configuration
Steve Dower added the comment: Afraid not. The closest you can get is building in Release with full debug symbols and no optimisations, which should al lest get you decent debugging. However, you won't get the extra memory check patterns or assertions throughout your code. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23393 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23393] [Windows] Unable to link with Python in debug configuration
Steve Dower added the comment: You'll also need to change your project to use the release version of the C Runtime library and undefine _DEBUG throughout, otherwise you'll get conflicts in things like memory allocators and alignment. It's not quite as simple as choosing another lib. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23393 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23393] [Windows] Unable to link with Python in debug configuration
Sébastien Gallou added the comment: So there is no mean to build my application in debug mode without rebuilding all Python ? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23393 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: pymongo and attribute dictionaries
Travis Griggs wrote:
for doc in client.db.radios.find({’_id': {’$regex’: ‘^[ABC]'}}): pprint(doc)
changes to
for doc in ((Doc(d) for d in client.db.radios.find({’_id': {’$regex’:
‘^[ABC]'}})): pprint(doc)
Are there other approaches? Feel free to impress me with evil abuses in the
interest of academic enrichment...
You could encapsulate some of that in a helper function such as
def docs(source):
for d in source:
yield Doc(d)
then your example becomes
for doc in docs(client.db.radios.find({’_id': {’$regex’: ‘^[ABC]'}})):
pprint(doc)
--
Greg
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Re: Cairo module
Could you be a little more specific (giving, for instance, a full working example)? I tried to interchange surface = cairo.ImageSurface (cairo.FORMAT_ARGB32, WIDTH, HEIGHT) with surface = cairo.Win32Surface (cairo.FORMAT_ARGB32, WIDTH, HEIGHT) but that didn't seem to work. Could matplotlib be used to show the image? Poul Riis -- https://mail.python.org/mailman/listinfo/python-list
Re: pymongo and attribute dictionaries
On Wed, 04 Feb 2015 13:54:22 -0700, Ian Kelly wrote:
I'd prefer map (or itertools.imap in Python 2) over the inline generator
in this case:
for doc in map(Doc, client.db.radios.find({’_id': {’$regex’:
‘^[ABC]'}})):
pprint(doc)
Or if you like, a utility function wrapping the same.
def docs(dicts):
return map(Doc, dicts)
Or, if you really wanted to be crazy
for d in client.db.radios.find({’_id': {’$regex’: ‘^[ABC]'}}):
doc = Doc(d)
pprint(doc)
I mean, I realize linefeeds don't grow on trees and all...
--
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Email address domain is currently out of order. See above to fix.
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[issue23394] No garbage collection at end of main thread
New submission from François Trahan: When reaching the end of a script, there is no garbage collection done if another thread is running. If you have cyclic references between objects that would be elligible for collection under one of which a __del__ would terminate that thread, execution will hang at the end of the main thread. We ended up in this situation; adding gc.collect at the end of our script solves the problem, but this is a library and it is not reasonnable to assume all our clients will properly ensure every execution path properly forces a garbage collection. Suggestion: at the end of a thread, or at least main thread, force a collection. -- components: Interpreter Core messages: 235406 nosy: François.Trahan priority: normal severity: normal status: open title: No garbage collection at end of main thread versions: Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23394 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23393] [Windows] Unable to link with Python in debug configuration
Sébastien Gallou added the comment: Thanks Steve, I will try to build it (hope it will not be too difficult...). If I don't success, I will use your solution. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23393 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21998] asyncio: a new self-pipe should be created in the child process after fork
STINNER Victor added the comment: close_self_pipe_after_selector.patch only fixes test2.py, it doesn't fix the general case: run the same event loop in two different event loops. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21998 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22087] asyncio: support multiprocessing
Changes by STINNER Victor victor.stin...@gmail.com: -- title: _UnixDefaultEventLoopPolicy should either create a new loop or explicilty fail when get_event_loop() is called from a multiprocessing child process - asyncio: support multiprocessing ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22087 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: pymongo and attribute dictionaries
On Feb 4, 2015, at 9:22 AM, Ian Kelly ian.g.ke...@gmail.com wrote:
On Wed, Feb 4, 2015 at 9:50 AM, Travis Griggs travisgri...@gmail.com wrote:
I really like pymongo. And I really like Python. But one thing my fingers
really get tired of typing is
someDoc[‘_’id’]
This just does not roll of the fingers well. Too many “reach for modifier
keys” in a row. I would rather use
someDoc._id
Googling shows that I’m not the first to want to do this in the general
sense (e.g.
http://stackoverflow.com/questions/4984647/accessing-dict-keys-like-an-attribute-in-python).
Arguments aside of whether this should or shouldn’t be done, I want to know
how I might solve this with Python. Consider it an academic pursuit.
The problem I have is not how to do the AttributeDictionary subclass, there
are plenty of those examples. The problem is that the pymongo APIs already
return dictionaries. In a language (Smalltalk, Objective-C, Ruby) that
supports class extensions, that would be my first tool of choice to solve
this problem. I’d just extend Dictionary to behave the way I want and be
done with it. I can’t do that in Python though. I guess I could make my own
module that subclasses the relevant pymongo classes, and do super() calling
implementations of all of the relevant methods, coercing the return type.
That is a maintenance headache though.
What are my options, if any?
You could construct the AttributeDictionary by copying the dict
returned from pymongo. The question then is whether the copying would
be too expensive or not.
Alternately, you could just wrap the dictionaries returned by pymongo
in an object. Something like this should be all you need:
class AttrDictWrapper(object):
def __init__(self, the_dict):
self.__dict__ = the_dict
d = AttrDictWrapper({'spam': 42, 'ham': False})
d.spam
42
d.ham
False
Yes, that is clever. So if you wanted to minimize the amount of typing you had
to do at all of your pymongo API call sites, what strategy would you use to
keep that relatively terse?
Is the following the right approach to take?
class Doc(object):
def __init__(self, target):
self.__dict__ = target
and then something like
for doc in client.db.radios.find({’_id': {’$regex’: ‘^[ABC]'}}):
pprint(doc)
changes to
for doc in ((Doc(d) for d in client.db.radios.find({’_id': {’$regex’:
‘^[ABC]'}})):
pprint(doc)
Are there other approaches? Feel free to impress me with evil abuses in the
interest of academic enrichment...
--
https://mail.python.org/mailman/listinfo/python-list
[issue18932] Optimize selectors.EpollSelector.modify()
STINNER Victor added the comment: Benchmark on Fedora 21 (Linux 3.18.3, glibc 2.20, Python 3.5 rev 7494f3972726). Original: haypo@selma$ ./python -m timeit -s 'import os, selectors; s=selectors.SelectSelector(); r,w=os.pipe(); s.register(r, selectors.EVENT_READ)' 's.modify(r, selectors.EVENT_WRITE); s.modify(r, selectors.EVENT_READ)' 1 loops, best of 3: 43.7 usec per loop haypo@selma$ ./python -m timeit -s 'import os, selectors; s=selectors.PollSelector(); r,w=os.pipe(); s.register(r, selectors.EVENT_READ)' 's.modify(r, selectors.EVENT_WRITE); s.modify(r, selectors.EVENT_READ)' 1 loops, best of 3: 45.1 usec per loop haypo@selma$ ./python -m timeit -s 'import os, selectors; s=selectors.EpollSelector(); r,w=os.pipe(); s.register(r, selectors.EVENT_READ)' 's.modify(r, selectors.EVENT_WRITE); s.modify(r, selectors.EVENT_READ)' 1 loops, best of 3: 48.4 usec per loop Patched: haypo@selma$ ./python -m timeit -s 'import os, selectors; s=selectors.SelectSelector(); r,w=os.pipe(); s.register(r, selectors.EVENT_READ)' 's.modify(r, selectors.EVENT_WRITE); s.modify(r, selectors.EVENT_READ)' 1 loops, best of 3: 37.2 usec per loop haypo@selma$ ./python -m timeit -s 'import os, selectors; s=selectors.PollSelector(); r,w=os.pipe(); s.register(r, selectors.EVENT_READ)' 's.modify(r, selectors.EVENT_WRITE); s.modify(r, selectors.EVENT_READ)' 1 loops, best of 3: 40.5 usec per loop haypo@selma$ ./python -m timeit -s 'import os, selectors; s=selectors.EpollSelector(); r,w=os.pipe(); s.register(r, selectors.EVENT_READ)' 's.modify(r, selectors.EVENT_WRITE); s.modify(r, selectors.EVENT_READ)' 1 loops, best of 3: 39.9 usec per loop * SelectSelector: 14% faster (-6.5 us) * PollSelector: 10% faster (-4.6 us) * EpollSelector: 18% faster (-8.5 us) -- _BaseSelectorImpl.modify() still calls unregister() and register(). I chose to factorize code in modify() and only put the specific code in _modify(). The advantage is to pass directly oldkey and key to _modify(). We may even try to keep the selector consistent if _modify() fails. For example, start with unregister, and only register if _modify() succeed. -- In a previous (local) patch, the default implementation of _modify() was: self.unregister(fileobj) return self.register(fileobj, events, data) And each specialized _modify() started with: oldkey = self.unregister(fileobj) key = self.register(fileobj, events, data) Do you prefer this? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18932 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: pymongo and attribute dictionaries
On Wed, Feb 4, 2015 at 1:16 PM, Travis Griggs travisgri...@gmail.com wrote:
Yes, that is clever. So if you wanted to minimize the amount of typing you
had to do at all of your pymongo API call sites, what strategy would you use
to keep that relatively terse?
Is the following the right approach to take?
class Doc(object):
def __init__(self, target):
self.__dict__ = target
and then something like
for doc in client.db.radios.find({’_id': {’$regex’: ‘^[ABC]'}}):
pprint(doc)
changes to
for doc in ((Doc(d) for d in client.db.radios.find({’_id': {’$regex’:
‘^[ABC]'}})):
pprint(doc)
Are there other approaches? Feel free to impress me with evil abuses in the
interest of academic enrichment...
I'd prefer map (or itertools.imap in Python 2) over the inline
generator in this case:
for doc in map(Doc, client.db.radios.find({’_id': {’$regex’: ‘^[ABC]'}})):
pprint(doc)
Or if you like, a utility function wrapping the same.
def docs(dicts):
return map(Doc, dicts)
--
https://mail.python.org/mailman/listinfo/python-list
Re: pymongo and attribute dictionaries
On Wed, Feb 4, 2015 at 1:16 PM, Travis Griggs travisgri...@gmail.com wrote:
Yes, that is clever. So if you wanted to minimize the amount of typing you
had to do at all of your pymongo API call sites, what strategy would you use
to keep that relatively terse?
Is the following the right approach to take?
class Doc(object):
def __init__(self, target):
self.__dict__ = target
and then something like
for doc in client.db.radios.find({’_id': {’$regex’: ‘^[ABC]'}}):
pprint(doc)
changes to
for doc in ((Doc(d) for d in client.db.radios.find({’_id': {’$regex’:
‘^[ABC]'}})):
pprint(doc)
Are there other approaches? Feel free to impress me with evil abuses in the
interest of academic enrichment...
I'd prefer map (or itertools.imap in Python 2) over the inline
generator in this case:
for doc in map(Doc, client.db.radios.find({’_id': {’$regex’: ‘^[ABC]'}})):
pprint(doc)
Or if you like, a utility function wrapping the same.
def docs(dicts):
return map(Doc, dicts)
--
https://mail.python.org/mailman/listinfo/python-list
Re: meaning of: line, =
On Thu, Feb 5, 2015 at 4:36 AM, Peter Otten __pete...@web.de wrote: Another alternative is to put a list literal on the lefthand side: def f(): yield 42 ... [result] = f() result 42 Huh, was not aware of that alternate syntax. (If you're worried: neither the list nor the tuple will be created; the bytecode is identical in both cases) It can't possibly be created anyway. Python doesn't have a notion of assignable thing that, when assigned to, will assign to something else like C's pointers or C++'s references. There's nothing that you could put into the list that would have this behaviour. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
[issue21998] asyncio: a new self-pipe should be created in the child process after fork
STINNER Victor added the comment: Attached at_fork.patch: detect fork and handle fork. * Add _at_fork() method to asyncio.BaseEventLoop * Add _detect_fork() method to asyncio.BaseEventLoop * Add _at_fork() method to selectors.BaseSelector I tried to minimize the number of calls to _detect_fork(): only when the self-pipe or the selector is used. I only tried test2.py. More tests using two processes running two event loops should be done, and non-regression tests should be written. The issue #22087 (multiprocessing) looks like a duplicate of this issue. -- Added file: http://bugs.python.org/file38016/at_fork.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21998 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: pymongo and attribute dictionaries
On Wed, Feb 4, 2015 at 12:16 PM, Travis Griggs travisgri...@gmail.com wrote:
On Feb 4, 2015, at 9:22 AM, Ian Kelly ian.g.ke...@gmail.com wrote:
On Wed, Feb 4, 2015 at 9:50 AM, Travis Griggs travisgri...@gmail.com wrote:
I really like pymongo. And I really like Python. But one thing my fingers
really get tired of typing is
someDoc[‘_’id’]
This just does not roll of the fingers well. Too many “reach for modifier
keys” in a row. I would rather use
someDoc._id
Googling shows that I’m not the first to want to do this in the general
sense (e.g.
http://stackoverflow.com/questions/4984647/accessing-dict-keys-like-an-attribute-in-python).
Arguments aside of whether this should or shouldn’t be done, I want to know
how I might solve this with Python. Consider it an academic pursuit.
The problem I have is not how to do the AttributeDictionary subclass, there
are plenty of those examples. The problem is that the pymongo APIs already
return dictionaries. In a language (Smalltalk, Objective-C, Ruby) that
supports class extensions, that would be my first tool of choice to solve
this problem. I’d just extend Dictionary to behave the way I want and be
done with it. I can’t do that in Python though. I guess I could make my own
module that subclasses the relevant pymongo classes, and do super() calling
implementations of all of the relevant methods, coercing the return type.
That is a maintenance headache though.
What are my options, if any?
You could construct the AttributeDictionary by copying the dict
returned from pymongo. The question then is whether the copying would
be too expensive or not.
Alternately, you could just wrap the dictionaries returned by pymongo
in an object. Something like this should be all you need:
class AttrDictWrapper(object):
def __init__(self, the_dict):
self.__dict__ = the_dict
d = AttrDictWrapper({'spam': 42, 'ham': False})
d.spam
42
d.ham
False
Yes, that is clever. So if you wanted to minimize the amount of typing you
had to do at all of your pymongo API call sites, what strategy would you use
to keep that relatively terse?
Is the following the right approach to take?
class Doc(object):
def __init__(self, target):
self.__dict__ = target
and then something like
for doc in client.db.radios.find({’_id': {’$regex’: ‘^[ABC]'}}):
pprint(doc)
changes to
for doc in ((Doc(d) for d in client.db.radios.find({’_id': {’$regex’:
‘^[ABC]'}})):
pprint(doc)
Are there other approaches? Feel free to impress me with evil abuses in the
interest of academic enrichment...
One possible approach, that may or may not work based on the use case,
would be to monkey patch the module. The main drawback is that if it
is used in places that do not expect the wrapper, it could well break.
Untested code:
import types
def monkey(module):
for attr in dir(module):
if attr.startswith('_'): # Ignore private attributes.
continue
object = getattr(module, attr)
if not isinstance(object, types.Function): # Ignore non-functions.
continue
setattr(module, attr, lambda *args, **kwargs:
AttrDictWrapper(object(*args, **kwargs)))
Another option would be to create a wrapper module. This option has
the side-effect that it would be difficult to recurse into classes, as
you would have to copy the class. This would be very similar (again,
untested):
import types # Note that this may get overridden in the function,
which could cause problems.
def makeWrapper(module):
for attr in dir(module):
if attr.startswith('_'): # Ignore private attributes.
continue
object = getattr(module, attr)
if not isinstance(object, types.Function): # Ignore non-functions.
object = lambda *args, **kwargs:
AttrDictWrapper(object(*args, **kwargs))
globals()[attr] = object
Both of these are written to (attempt) to replace all instances.
Obviously, this could be reduced to a white-list or additional checks
could be made to restrict the wrapped sets. I would be VERY weary of
actually using the first due to the noted drawback. The second is
safer, but you would want to be careful to test it for unexpected
side-effects.
--
https://mail.python.org/mailman/listinfo/python-list
[issue22087] _UnixDefaultEventLoopPolicy should either create a new loop or explicilty fail when get_event_loop() is called from a multiprocessing child process
STINNER Victor added the comment: This issue looks to be a duplicate of #21998. handle-mp_unix2.patch looks more to a workaround than a real issue. When I write asyncio code, I prefer to pass explicitly the loop, so get_event_loop() should never be called. IMO the methods of the event loop should detect the fork and handle the fork directly. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22087 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: meaning of: line, =
On Thu, Feb 5, 2015 at 1:08 AM, ast nom...@invalid.com wrote: I dont understand why there is a comma just after line in the following command: line, = plt.plot(x, np.sin(x), '--', linewidth=2) I never saw that before Found here: http://matplotlib.org/examples/lines_bars_and_markers/line_demo_dash_control.html That's a slightly unusual form of unpacking. Compare: def get_values(): return 5, 7, 2 x, y, z = get_values() This is like x = 5; y = 7; z = 2, because it unpacks the function's return value into those three targets. What you have is exactly the same, except that it has only one target. So it's expecting plt.plot() to return an iterable with exactly one thing in it, and it'll unpack it and put that thing into line: def get_packaged_value(): return [42] x, = get_packaged_value() This is equivalent to x = 42. I don't know matplotlib, so I don't know what it's returning or why, but as long as it's iterable and yields exactly one thing, this will work. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: meaning of: line, =
- Original Message - From: Chris Angelico ros...@gmail.com To: Cc: python-list@python.org python-list@python.org Sent: Wednesday, February 4, 2015 3:24 PM Subject: Re: meaning of: line, = On Thu, Feb 5, 2015 at 1:08 AM, ast nom...@invalid.com wrote: I dont understand why there is a comma just after line in the following command: line, = plt.plot(x, np.sin(x), '--', linewidth=2) I never saw that before Found here: http://matplotlib.org/examples/lines_bars_and_markers/line_demo_dash_control.html That's a slightly unusual form of unpacking. Compare: def get_values(): return 5, 7, 2 x, y, z = get_values() This is like x = 5; y = 7; z = 2, because it unpacks the function's return value into those three targets. What you have is exactly the same, except that it has only one target. So it's expecting plt.plot() to return an iterable with exactly one thing in it, and it'll unpack it and put that thing into line: def get_packaged_value(): return [42] x, = get_packaged_value() This is equivalent to x = 42. I don't know matplotlib, so I don't know what it's returning or why, but as long as it's iterable and yields exactly one thing, this will work. I have also never seen this before, but perhaps this: f = lambda: [42] result, = f() result 42 ... is slightly cleaner than this: result = f()[0] result 42 -- https://mail.python.org/mailman/listinfo/python-list
Re: basic generator question
Neal Becker wrote:
I have an object that expects to call a callable to get a value:
class obj:
def __init__ (self, gen):
self.gen = gen
def __call__ (self):
return self.gen()
As written that looks a bit like
if boolean_expression == True: ...
as you could replace
inst = obj(callable)
with
inst = callable
but that may be an artifact of the example.
Now I want gen to be a callable that repeats N times. I'm thinking, this
sounds perfect for yield
class rpt:
def __init__ (self, value, rpt):
self.value = value; self.rpt = rpt
def __call__ (self):
for i in range (self.rpt):
yield self.value
so I would do:
my_rpt_obj = obj (rpt ('hello', 5))
to repeat 'hello' 5 times (for example).
What do you expect to happen when my_rpt_obj is called the sixth time?
But this doesn't work. when obj calls self.gen(), that returns a
generator, not the next value.
How can I make this work? I can't change the interface of the existing
class obj, which expects a callable to get the next value.
class Obj:
... def __init__(self, gen):
... self.gen = iter(gen)
... def __call__(self):
... return next(self.gen)
...
class Repeat:
... def __init__(self, value, times):
... self.value = value
... self.times = times
... def __iter__(self):
... for i in range(self.times):
... yield self.value
...
r = Obj(Repeat(hello, 3))
r()
'hello'
r()
'hello'
r()
'hello'
r()
Traceback (most recent call last):
File stdin, line 1, in module
File stdin, line 5, in __call__
StopIteration
Instead of the Repeat class you may use a generator:
def repeat(value, times):
... for i in range(times):
... yield value
...
r = Obj(repeat(hello, 2))
r()
'hello'
r()
'hello'
r()
Traceback (most recent call last):
File stdin, line 1, in module
File stdin, line 5, in __call__
StopIteration
This is for demonstration purposes as there is already itertools.repeat():
import itertools
r = Obj(itertools.repeat(world, 2))
r()
'world'
r()
'world'
r()
Traceback (most recent call last):
File stdin, line 1, in module
File stdin, line 5, in __call__
StopIteration
Depending on your actual need you may also omit the Obj() class:
import functools
r = functools.partial(next, itertools.repeat(goodbye, 2))
r()
'goodbye'
r()
'goodbye'
r()
Traceback (most recent call last):
File stdin, line 1, in module
StopIteration
Somewhat less formal you can bind the iterator method directly:
r = itertools.repeat(GOODBYE, 2).__next__ # next in Python 2
r()
'GOODBYE'
r()
'GOODBYE'
r()
Traceback (most recent call last):
File stdin, line 1, in module
StopIteration
--
https://mail.python.org/mailman/listinfo/python-list
[issue20289] Make cgi.FieldStorage a context manager
Berker Peksag added the comment: Here's an updated patch. Thank you Serhiy. -- Added file: http://bugs.python.org/file38017/issue20289_v2.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue20289 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23345] test_ssl fails on OS X 10.10.2 with latest patch level of OpenSSL libs
Roundup Robot added the comment: New changeset 49f07942fbd7 by Ned Deily in branch '2.7': Issue #23345: Prevent test_ssl failures with large OpenSSL patch level https://hg.python.org/cpython/rev/49f07942fbd7 New changeset 52932cd7f003 by Ned Deily in branch '3.4': Issue #23345: Prevent test_ssl failures with large OpenSSL patch level https://hg.python.org/cpython/rev/52932cd7f003 New changeset 62b322b82f00 by Ned Deily in branch 'default': Issue #23345: merge from 3.4 https://hg.python.org/cpython/rev/62b322b82f00 -- nosy: +python-dev ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23345 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23345] test_ssl fails on OS X 10.10.2 with latest patch level of OpenSSL libs
Ned Deily added the comment: Fixed for 2.7.10, 3.4.3, and 3.5.0. -- resolution: - fixed stage: needs patch - resolved status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23345 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22087] asyncio: support multiprocessing
STINNER Victor added the comment: See also the https://pypi.python.org/pypi/mpworker project -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22087 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: Cairo module
You might consider using python-imaging to display the image after writing it from cairo import image import statement should be import Image note uppercase I -- Stanley C. Kitching Human Being Phoenix, Arizona -- https://mail.python.org/mailman/listinfo/python-list
[issue23394] No garbage collection at end of main thread
Antoine Pitrou added the comment: Can you post a simple reproducer so that we can more easily see what you are talking about? Thank you. -- nosy: +pitrou ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23394 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: ANN: unpyc3 - a python bytecode decompiler for Python3
On 02/04/2015 05:19 PM, sohcahto...@gmail.com wrote: They can take your computer and it doesn't matter if you've got your files on Dropbox. My dog ate my USB stick. :-) I never used a USB stick for school work. At this point, I'm probably sounding like a shill for Dropbox, but I'm really not. I imagine Google Drive offers the same features. Access to your files from the web, synchronization of local files among computers with access to it, and the ability to retrieve and restore files from previous versions. In my mind, they are all tools. And no one tool should be used and trusted above all others. Anyone that's programming should be using version control, period. But that's not for backup, and backup can and should be used as well as version control. Everything I work on I commit to git regularly because of the utility git gives me. If I end up trying something that doesn't pan out, I can retrace my steps (that's what branches are for). I don't have to dig through two weeks of hourly backups to find out where it was when I started making a change. Backup and git serve two complementary but different purposes. As well as regularly committing code to Git, I run CrashPlan and on a regular schedule (hourly perhaps) it copies all changes, committed or not, and including the git repo itself to the cloud, and also to my other computer, as well as my parents' computer. CrashPlan makes this stuff easy, so there's no reason not have redundancy. As well, I semi-regularly run a manual rsync backup to three different USB hard drives on a rotating backup. Is this overkill? I don't believe so. It requires virtually no work on my part. I don't see any one cloud service as the best product. Why not use them all? Encrypt if you need to, and sync hourly snapshots to google drive, drop box, and any other free cloud service. -- https://mail.python.org/mailman/listinfo/python-list
[issue23395] _thread.interrupt_main() errors if SIGINT handler in SIG_DFL, SIG_IGN
New submission from Thomas Kluyver: In tracking down an obscure error we were seeing, we boiled it down to this test case for thread.interrupt_main(): import signal, threading, _thread, time signal.signal(signal.SIGINT, signal.SIG_DFL) # or SIG_IGN def thread_run(): _thread.interrupt_main() t = threading.Thread(target=thread_run) t.start() time.sleep(10) This fails with an error message TypeError: 'int' object is not callable, and a traceback completely disconnected from the cause of the error, presumably because it's not coming from the usual Python stack. The problem appears to be that interrupt_main sets (in the C code) Handlers[SIGINT].tripped, which is only expected to occur when the handler is a Python function. When PyErr_CheckSignals() runs, it tries to call Handlers[SIGINT].func as a Python function, but it's a Python integer, causing the error. I think the fix for this is to check what Handlers[sig_num].func is, either in trip_signal() before setting Handlers[sig_num].tripped, or in PyErr_CheckSignals before calling it. I can work on a patch if desired, but I'm not brilliant at C. -- components: Library (Lib) messages: 235412 nosy: minrk, takluyver priority: normal severity: normal status: open title: _thread.interrupt_main() errors if SIGINT handler in SIG_DFL, SIG_IGN type: behavior versions: Python 3.5 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23395 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23264] Add pickle support of dict views
Changes by Josh Rosenberg shadowranger+pyt...@gmail.com: -- nosy: +josh.r ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23264 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: pymongo and attribute dictionaries
Travis Griggs wrote: I really like pymongo. And I really like Python. But one thing my fingers really get tired of typing is someDoc[‘_’id’] I've never used pymongo, so can't comment from experience, but surely any library which encourages, if not requires, that you access private data _id doesn't inspire me with confidence. Also, the above is a syntax error, but you probably know that. This just does not roll of the fingers well. Too many “reach for modifier keys” in a row. *One* modifier key in a row is too many? s o m e SHIFT D o c [ ' SHIFT _ i d ' ] You can cut that by 50% by changing your naming convention: somedoc['_id'] While you're at it, you can cut the total number of keystrokes too: doc['_id'] If there are a fixed set of key names that you use repeatedly, you can do this: ID, FE, FI, FO, FUM = '_id', '_fe', '_fi', '_fo', '_fum' # later someDoc[ID] Ah, but that needs the shiftkey... well, I guess that PEP 8 naming conventions aren't compulsory, and so long as you don't need the built-in `id` function, it's okay to shadow it (consenting adults and all that), so: id, fe, fi, fo, fum = '_id', '_fe', '_fi', '_fo', '_fum' # later someDoc[id] I would rather use someDoc._id That has exactly the same number of modifier keys as your original example. I'm starting to sense that you don't actually care about the SHIFT key... [...] The problem I have is not how to do the AttributeDictionary subclass, there are plenty of those examples. The problem is that the pymongo APIs already return dictionaries. In a language (Smalltalk, Objective-C, Ruby) that supports class extensions, that would be my first tool of choice to solve this problem. I’d just extend Dictionary to behave the way I want and be done with it. I can’t do that in Python though. I guess I could make my own module that subclasses the relevant pymongo classes, and do super() calling implementations of all of the relevant methods, coercing the return type. That is a maintenance headache though. What are my options, if any? HingTFU comes to mind :-) But as an academic exercise *nudge nudge, wink wink* there's always the Adaptor design pattern. Import as much or as little of pymongo as you need, wrap it in an adaptor, and use that. There are lots of different ways that you could do this, some more monkey-patchy than others. # pymongo adaptor module (untested) from pymongo import * import functools def wrap(name): Wrap function called `name` so it returns an AttrDict instead of dict. May the gods have mercy on your soul. func = globals()[name] @functools.wraps(func) def inner(*args, **kwargs): result = func(*args, **kwargs) if isinstance(result, dict): result = AttrDict(result) return result globals()[name] = func FUNCTIONS_THAT_RETURN_DICTS = ['this', 'that', 'another'] for name in FUNCTIONS_THAT_RETURN_DICTS: wrap(name) Extending this to use introspection to automatically detect the pymongo functions instead of having to list them manually is left as an exercise. (Hint: import pymongo; for obj in vars(pymongo): ...). Extending this to wrap methods of classes is also left as an exercise. (Hint: don't subclass. Search the ActiveState Python recipes for automatic delegation by Alex Martelli.) And now just use the adaptor module instead of the original. -- Steven -- https://mail.python.org/mailman/listinfo/python-list
Re: Cairo module
Could matplotlib be used to show the image? You might consider using python-imaging to display the image after writing it from cairo import image surface.write_to_png ( x_surface.png ) img = Image.open( x_surface.png ) img.show( command = 'display' ) -- Stanley C. Kitching Human Being Phoenix, Arizona -- https://mail.python.org/mailman/listinfo/python-list
[issue23395] _thread.interrupt_main() errors if SIGINT handler in SIG_DFL, SIG_IGN
Changes by Antoine Pitrou pit...@free.fr: -- nosy: +haypo, neologix ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23395 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: ANN: unpyc3 - a python bytecode decompiler for Python3
On Wednesday, January 28, 2015 at 4:30:11 PM UTC-8, Steven D'Aprano wrote: sohcahto...@gmail.com wrote: I recently finished my CS degree, and I had more than one professor say that they won't take My computer crashed and I lost everything! as an excuse for not being able to turn in homework. How about My computer crashed and died and now I can't get to Dropbox to access my files? If you have access to a web browser, you have access to your Dropbox files. I don't own a printer. If I needed to print something for school, I just printed it from my Dropbox at school. My computer got infected by ransomware which encrypted all my data files and blocks access to Dropbox. Dropbox saves previous versions of files. Just restore them from the last version you had before they got encrypted by the ransomware. This can be done from any browser. One of my housemates torrented a Linux tarball, and the MPAA wrongly identified it as a movie file. Purely on their say-so, my ISP disabled my account and banned me from the Internet. But all is not lost, if I move 45 miles away, I can sign up with a different ISP! Not exactly a likely scenario, and still not a problem unless you're not allowed to access the internet from someone's WiFi. Some dude I've never seen before gate-crashed our party and was smoking pot, and the police raided us and seized my computer and everybody's phones. My lawyer tells me the raid was illegal and if spend two or three hundred thousand dollars in legal fees, I'll probably be able to get my computer back within eight years or so. They can take your computer and it doesn't matter if you've got your files on Dropbox. My dog ate my USB stick. :-) I never used a USB stick for school work. At this point, I'm probably sounding like a shill for Dropbox, but I'm really not. I imagine Google Drive offers the same features. Access to your files from the web, synchronization of local files among computers with access to it, and the ability to retrieve and restore files from previous versions. -- https://mail.python.org/mailman/listinfo/python-list
[issue23396] Wrong print for 2.7.9
New submission from John Boersma: In the tutorial for 2.7.9, in the section on quotes and the escape character, there is the following example text: 'Isn\'t, she said.' 'Isn\'t, she said.' print 'Isn\'t, she said.' Isn't, she said. s = 'First line.\nSecond line.' # \n means newline s # without print(), \n is included in the output 'First line.\nSecond line.' print s # with print, \n produces a new line First line. Second line. Note the print() in a comment. Isn't that Python 3 syntax? Should just be print for 2.7, I believe. -- assignee: docs@python components: Documentation messages: 235414 nosy: docs@python, johnboersma priority: normal severity: normal status: open title: Wrong print for 2.7.9 type: enhancement versions: Python 2.7 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23396 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: pymongo and attribute dictionaries
Ian Kelly wrote: Extending this to wrap methods of classes is also left as an exercise. (Hint: don't subclass. Search the ActiveState Python recipes for automatic delegation by Alex Martelli.) Do you mean this one? http://code.activestate.com/recipes/52295-automatic-delegation-as-an- alternative-to-inherita/ That's based on old-style classes. With new-style classes it fails to delegate dunder methods like __str__. That recipe should be considered obsolete. I'm aware of the problem with dunder methods. But that's not an insurmountable problem, if you need your delegation recipe to support dunders (and you may not), it's fiddly and annoying to do so, but not impossible. There are at least two approaches: - manually delegate to the dunders that you care about with hand- written dunder methods: def __str__(self): return type(self.proxied_object).__str__(self.proxied_object) # or for people who prefer simplicity over correctness # return self.proxied_object.__str__() - write a decorator which inspects the class and automatically adds explicit dunders for you. (There's a recipe on ActiveState for that one too.) Regardless of whether you start with Alex's recipe or not, the idea is to make a proxy for the pymongo classes, and delegate to it rather than subclass or re-invent the wheel. That's a basic design pattern, and if dunders are a problem in Python that Ruby or Java doesn't have, oh well, life wasn't meant to be easy. -- Steven -- https://mail.python.org/mailman/listinfo/python-list
Indentation issues with python
I downloaded this code and am attempting to run it. I keep getting
indentation error. there is a way to handle it with a editor which can
recognize the tab or space issue. I have tried different options such as 2
or 3 spaces or tab to no avail.
I have encased the error mesage with line 23 between
import sys
import azure
import socket
from azure.servicebus import (
_service_bus_error_handler
)
from azure.servicebus.servicebusservice import (
ServiceBusService,
ServiceBusSASAuthentication
)
from azure.http import (
HTTPRequest,
HTTPError
)
from azure.http.httpclient import _HTTPClient
class EventHubClient(object):
def sendMessage(self,body,partition):eventHubHost =
pac-ns.servicebus.windows.net
httpclient = _HTTPClient(service_instance=self)
File test1.py, line 23
def sendMessage(self,body,partition):
^
IndentationError: expected an indented block
***
sasKeyName = SendPolicy
sasKeyValue = erENqf/5wdWCNEbCA9NsDIRqd5MRKdkii07+wezl/NU=
authentication = ServiceBusSASAuthentication(sasKeyName,sasKeyValue)
request = HTTPRequest()
request.method = POST
request.host = eventHubHost
request.protocol_override = https
request.path = /myhub/publishers/ + partition +
/messages?api-version=2014-05
request.body = body
request.headers.append(('Content-Type',
'application/atom+xml;type=entry;charset
=utf-8'))
authentication.sign_request(request, httpclient)
request.headers.append(('Content-Length', str(len(request.body)))
--
*Syed Khalid*
--
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Re: pymongo and attribute dictionaries
On Wed, Feb 4, 2015 at 3:38 PM, Steven D'Aprano steve+comp.lang.pyt...@pearwood.info wrote: Travis Griggs wrote: This just does not roll of the fingers well. Too many “reach for modifier keys” in a row. *One* modifier key in a row is too many? s o m e SHIFT D o c [ ' SHIFT _ i d ' ] I think the point was meant to be the number of keys that need to be reached for, not just the number of times Shift needs to be pressed. Extending this to wrap methods of classes is also left as an exercise. (Hint: don't subclass. Search the ActiveState Python recipes for automatic delegation by Alex Martelli.) Do you mean this one? http://code.activestate.com/recipes/52295-automatic-delegation-as-an-alternative-to-inherita/ That's based on old-style classes. With new-style classes it fails to delegate dunder methods like __str__. That recipe should be considered obsolete. -- https://mail.python.org/mailman/listinfo/python-list
[issue23396] Wrong print for 2.7.9
John Boersma added the comment: To clarify - this is in tutorial section 3.1.2. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23396 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23351] socket.settimeout(5.0) does not have any effect
Piotr Jurkiewicz added the comment:
Does not work on Debian 7 Wheezy, kernel 3.2.65.
$ python test.py
('sending ', 0)
took 0.000s
('sending ', 1)
took 0.000s
('sending ', 2)
took 0.000s
('sending ', 3)
took 0.000s
('sending ', 4)
took 0.000s
('sending ', 5)
took 0.000s
('sending ', 6)
took 0.000s
('sending ', 7)
took 0.000s
('sending ', 8)
took 0.000s
('sending ', 9)
took 0.000s
('sending ', 10)
took 0.000s
('sending ', 11)
took 0.000s
Traceback (most recent call last):
File test.py, line 17, in module
s.sendto(hello, SOCKNAME)
socket.error: [Errno 11] Resource temporarily unavailable
$ uname -a
Linux 3.2.0-4-amd64 #1 SMP Debian 3.2.65-1+deb7u1 x86_64 GNU/Linux
--
status: pending - open
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[issue23396] Wrong print for 2.7.9
Roundup Robot added the comment: New changeset 2bb5fa752bfc by Benjamin Peterson in branch '2.7': remove parenthesis from print statement (closes #23396) https://hg.python.org/cpython/rev/2bb5fa752bfc -- nosy: +python-dev resolution: - fixed stage: - resolved status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23396 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23351] socket.settimeout(5.0) does not have any effect
Charles-François Natali added the comment: It's a kernel bug closing (working fine on my Debian wheezy with a more recent kernel BTW). -- resolution: - third party status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23351 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue14910] argparse: disable abbreviation
Berker Peksag added the comment: The patch LGTM. In Doc/library/argparse.rst: - add_help=True) + allow_abbrev=True, add_help=True) should be add_help=True, allow_abbrev=True) I'll add a release note and commit it. Thanks! -- assignee: - berker.peksag nosy: +berker.peksag ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue14910 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23390] make profile-opt: test_distutils failure
Roundup Robot added the comment: New changeset 8957ff9776bd by Gregory P. Smith in branch '3.4': Fixes issue23390: make profile-opt causes -fprofile-generate and related flags https://hg.python.org/cpython/rev/8957ff9776bd New changeset 9c46707e5526 by Gregory P. Smith in branch 'default': Fixes issue23390: make profile-opt causes -fprofile-generate and related flags https://hg.python.org/cpython/rev/9c46707e5526 -- nosy: +python-dev ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23390 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue20416] Marshal: special case int and float, don't use references
Serhiy Storchaka added the comment: Here is a patch which adds separate dict for interned strings (otherwise they can be uninterned) and for bytes. It also slightly simplify the code. -- Added file: http://bugs.python.org/file38012/marshal_refs_by_value_3.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue20416 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
basic generator question
I have an object that expects to call a callable to get a value:
class obj:
def __init__ (self, gen):
self.gen = gen
def __call__ (self):
return self.gen()
Now I want gen to be a callable that repeats N times. I'm thinking, this
sounds perfect for yield
class rpt:
def __init__ (self, value, rpt):
self.value = value; self.rpt = rpt
def __call__ (self):
for i in range (self.rpt):
yield self.value
so I would do:
my_rpt_obj = obj (rpt ('hello', 5))
to repeat 'hello' 5 times (for example).
But this doesn't work. when obj calls self.gen(), that returns a generator, not
the next value.
How can I make this work? I can't change the interface of the existing class
obj, which expects a callable to get the next value.
--
-- Those who don't understand recursion are doomed to repeat it
--
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[ANN] PythonQt 3.0 released!
PythonQt 3.0 has just been released. PythonQt is a dynamic binding of the Qt API and allows to embedd Python easily into C++ Qt applications. The PythonQt bindings offer complete wrappers to most Qt 4 and Qt 5 APIs. PythonQt is open source (LGPL license) and is being used on Windows, Linux and MacOS. The following features have been added: * Python 3 support * Qt 5 support * C++/Python ownership tracking for most of the Qt API * better support for Pylint and jedi completion library * wrapping of all protected methods and protected enums * many small improvements and bug fixes https://sourceforge.net/projects/pythonqt/ http://pythonqt.sourceforge.net/ best regards, Florian Link -- https://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations/
Re: re.findall help
On 02/04/2015 03:52 AM, w3t...@gmail.com wrote:
I am trying to extract the following from a data stream using find
all what would be the best way to capture the ip address only from
the following text ip=192.168.1.36 port=4992 I also want to make
sure the program can handle the ip that is as high as
255.255.255.255
Thanks for any help you can provide
Hello,
It depends on whether you trust the data (if it's yours and you *know*
they're IP addresses) and just want to automate, or not..
pattern = re.compile(r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}')
Tested on:
test = ip=192.168.1.36 port=4992 ip=255.255.255.255 port=80
Gives:
['192.168.1.36', '255.255.255.255']
Add ip= in order to avoid confusion (data may have by chance something
that looks like an IP address, but the ip= bit acts as a discriminant.
pattern = re.compile(r'ip=\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}')
Testing for the string test:
test = ip=192.168.1.36 port=4992fdjsqklmfqsjdkip=192.168.541.36
port=222 2.2.2.2random
Gives:
['ip=192.168.1.36', 'ip=192.168.541.36']
It ignores the 2.2.2.2 because it doesn't have ip= in front of it, and
was just lucky to have an IP address structure.
You can then split ip= out of each item to have the IP address.
--
~Jugurtha Hadjar,
--
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[issue14203] PEP-3118: remove obsolete write-locks
Stefan Krah added the comment: I think it's sufficient to test bytesiobuf_getbuffer() on Linux and FreeBSD. The test just checks that the exception is raised. -- resolution: - fixed stage: patch review - resolved status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue14203 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
meaning of: line, =
hello I dont understand why there is a comma just after line in the following command: line, = plt.plot(x, np.sin(x), '--', linewidth=2) I never saw that before Found here: http://matplotlib.org/examples/lines_bars_and_markers/line_demo_dash_control.html thanks -- https://mail.python.org/mailman/listinfo/python-list
Re: meaning of: line, =
You'll find some explanation here: http://stackoverflow.com/questions/1708292/meaning-of-using-commas-and-underscores-with-python-assignment-operator On Wed, Feb 4, 2015 at 12:08 PM, ast nom...@invalid.com wrote: hello I dont understand why there is a comma just after line in the following command: line, = plt.plot(x, np.sin(x), '--', linewidth=2) I never saw that before Found here: http://matplotlib.org/examples/lines_bars_and_markers/line_demo_dash_control.html thanks -- https://mail.python.org/mailman/listinfo/python-list -- -- Leônidas S. Barbosa (Kirotawa) blog: corecode.wordpress.com -- https://mail.python.org/mailman/listinfo/python-list
Re: meaning of: line, =
On Thu, Feb 5, 2015 at 1:38 AM, Albert-Jan Roskam fo...@yahoo.com wrote: I have also never seen this before, but perhaps this: f = lambda: [42] result, = f() result 42 ... is slightly cleaner than this: result = f()[0] result 42 They're not technically identical. If the thing returned is subscriptable (as with your list example), then I would definitely subscript it rather than unpacking; but if it's something iterable but not subscriptable, the unpack will still work. def f(): yield 42 ... result, = f() result 42 result = f()[0] Traceback (most recent call last): File stdin, line 1, in module TypeError: 'generator' object is not subscriptable ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: meaning of: line, =
On Wednesday, February 4, 2015 at 8:14:29 PM UTC+5:30, Albert-Jan Roskam wrote: - Original Message - From: Chris Angelico Sent: Wednesday, February 4, 2015 3:24 PM Subject: Re: meaning of: line, = On Thu, Feb 5, 2015 at 1:08 AM, ast wrote: I dont understand why there is a comma just after line in the following command: line, = plt.plot(x, np.sin(x), '--', linewidth=2) I never saw that before Found here: http://matplotlib.org/examples/lines_bars_and_markers/line_demo_dash_control.html That's a slightly unusual form of unpacking. Compare: def get_values(): return 5, 7, 2 x, y, z = get_values() This is like x = 5; y = 7; z = 2, because it unpacks the function's return value into those three targets. What you have is exactly the same, except that it has only one target. So it's expecting plt.plot() to return an iterable with exactly one thing in it, and it'll unpack it and put that thing into line: def get_packaged_value(): return [42] x, = get_packaged_value() This is equivalent to x = 42. I don't know matplotlib, so I don't know what it's returning or why, but as long as it's iterable and yields exactly one thing, this will work. I have also never seen this before, but perhaps this: f = lambda: [42] result, = f() result 42 ... is slightly cleaner than this: result = f()[0] result 42 Well its cryptic and confusing (to me at least) And is helped by adding 2 characters: (result,) = f() instead of result, = f() -- https://mail.python.org/mailman/listinfo/python-list
[issue14965] super() and property inheritance behavior
Changes by Piotr Dobrogost p...@bugs.python.dobrogost.net: -- nosy: +piotr.dobrogost ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue14965 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue20416] Marshal: special case int and float, don't use references
Serhiy Storchaka added the comment: And here is alternative patch which uses a hashtable. Both patches have about the same performance for *.pyc files, but marshal_hashtable.patch is much faster for duplicated values. Marshalling [1000]*10**6, [1000.0]*10**6 and [1000.0j]*10**6 with version 3 an 4 is so fast as marshalling [1000]*10**6 with version 2 (i.e. 5 times faster than current implementation). data ver. dumps(ms) loads(ms) size(KiB) genData2 99.9 188.9 4090.7 genData3 148.2 189.1 4090.7 genData4 121.4 177.4 3651.3 [1000]*10**6 2 97.7 131.6 4882.8 [1000]*10**6 3 95.1 63.1 4882.8 [1000]*10**6 4 95.1 64.4 4882.8 [1000.0]*10**6 2 172.9 153.5 8789.1 [1000.0]*10**6 3 97.4 61.9 4882.8 [1000.0]*10**6 4 95.7 61.6 4882.8 [1000.0j]*10**62 288.6 228.216601.6 [1000.0j]*10**63 94.9 61.6 4882.8 [1000.0j]*10**64 95.1 62.2 4882.8 20 pydecimals 2 88.0 111.4 3929.6 20 pydecimals 3 57.0 51.4 3368.5 20 pydecimals 4 46.6 39.9 3292.8 -- Added file: http://bugs.python.org/file38013/marshal_hashtable.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue20416 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: basic generator question
On Thu, Feb 5, 2015 at 12:23 AM, Neal Becker ndbeck...@gmail.com wrote:
Now I want gen to be a callable that repeats N times. I'm thinking, this
sounds perfect for yield
class rpt:
def __init__ (self, value, rpt):
self.value = value; self.rpt = rpt
def __call__ (self):
for i in range (self.rpt):
yield self.value
so I would do:
my_rpt_obj = obj (rpt ('hello', 5))
to repeat 'hello' 5 times (for example).
But this doesn't work. when obj calls self.gen(), that returns a generator,
not
the next value.
How can I make this work? I can't change the interface of the existing class
obj, which expects a callable to get the next value.
So, if I understand you correctly, you want your rpt object to return
'hello' five times to five consecutive calls?
a = rpt()
a()
'hello'
a()
'hello'
a()
'hello'
a()
'hello'
a()
'hello'
You could do that with a generator by repeatedly calling next() on it,
or you could just keep track of the number of times you were called:
class rpt:
def __init__ (self, value, rpt):
self.value = value; self.rpt = rpt
def __call__ (self):
if self.rpt:
self.rpt -= 1
return self.value
# ... otherwise?
Up to you to figure out what to do when self.rpt hits zero.
ChrisA
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[issue23390] make profile-opt: test_distutils failure
Changes by Gregory P. Smith g...@krypto.org: -- resolution: - fixed status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23390 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23255] SimpleHTTPRequestHandler refactor for more extensible usage.
Ent added the comment: No I think it's better if you put up a separate patch. That way any questions other reviewers will have, you will be better suited to answer them. Cheers! -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23255 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: basic generator question
On Wed, Feb 4, 2015 at 9:32 AM, Chris Angelico ros...@gmail.com wrote:
On Thu, Feb 5, 2015 at 12:23 AM, Neal Becker ndbeck...@gmail.com wrote:
Now I want gen to be a callable that repeats N times. I'm thinking, this
sounds perfect for yield
class rpt:
def __init__ (self, value, rpt):
self.value = value; self.rpt = rpt
def __call__ (self):
for i in range (self.rpt):
yield self.value
so I would do:
my_rpt_obj = obj (rpt ('hello', 5))
to repeat 'hello' 5 times (for example).
But this doesn't work. when obj calls self.gen(), that returns a
generator, not
the next value.
How can I make this work? I can't change the interface of the existing
class
obj, which expects a callable to get the next value.
Can you actually show your code and the traceback?
So, if I understand you correctly, you want your rpt object to return
'hello' five times to five consecutive calls?
a = rpt()
a()
'hello'
a()
'hello'
a()
'hello'
a()
'hello'
a()
'hello'
You could do that with a generator by repeatedly calling next() on it,
or you could just keep track of the number of times you were called:
class rpt:
def __init__ (self, value, rpt):
self.value = value; self.rpt = rpt
def __call__ (self):
if self.rpt:
self.rpt -= 1
return self.value
# ... otherwise?
Up to you to figure out what to do when self.rpt hits zero.
ChrisA
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Joel Goldstick
http://joelgoldstick.com
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Re: basic generator question
On Wed, Feb 4, 2015 at 10:19 AM, Joel Goldstick joel.goldst...@gmail.com
wrote:
On Wed, Feb 4, 2015 at 9:32 AM, Chris Angelico ros...@gmail.com wrote:
On Thu, Feb 5, 2015 at 12:23 AM, Neal Becker ndbeck...@gmail.com wrote:
Now I want gen to be a callable that repeats N times. I'm thinking,
this
sounds perfect for yield
class rpt:
def __init__ (self, value, rpt):
self.value = value; self.rpt = rpt
def __call__ (self):
for i in range (self.rpt):
yield self.value
so I would do:
my_rpt_obj = obj (rpt ('hello', 5))
to repeat 'hello' 5 times (for example).
But this doesn't work. when obj calls self.gen(), that returns a
generator, not
the next value.
How can I make this work? I can't change the interface of the existing
class
obj, which expects a callable to get the next value.
Can you actually show your code and the traceback?
When you do rpt('hello',5)) you create an instance of rpt but you don't
actually invoke it.
maybe try:
my_rpt_obj = obj(rpt('hello',5))()
If I'm thinking straight, its the final () that actually cause your
__call__ to happen.
So, if I understand you correctly, you want your rpt object to return
'hello' five times to five consecutive calls?
a = rpt()
a()
'hello'
a()
'hello'
a()
'hello'
a()
'hello'
a()
'hello'
You could do that with a generator by repeatedly calling next() on it,
or you could just keep track of the number of times you were called:
class rpt:
def __init__ (self, value, rpt):
self.value = value; self.rpt = rpt
def __call__ (self):
if self.rpt:
self.rpt -= 1
return self.value
# ... otherwise?
Up to you to figure out what to do when self.rpt hits zero.
ChrisA
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--
Joel Goldstick
http://joelgoldstick.com
--
Joel Goldstick
http://joelgoldstick.com
--
https://mail.python.org/mailman/listinfo/python-list
Re: pymongo and attribute dictionaries
Vito De Tullio wrote: Steven D'Aprano wrote: This just does not roll of the fingers well. Too many “reach for modifier keys” in a row. *One* modifier key in a row is too many? s o m e SHIFT D o c [ ' SHIFT _ i d ' ] I'm not OP, but as side note... not everyone has [ as a direct character on the keyboard. I need to press AltGr + è (and AltGr + + to get ]), so I can feel the OP lamenting :) Point taken. Thank you. -- Steven -- https://mail.python.org/mailman/listinfo/python-list
Re: ANN: unpyc3 - a python bytecode decompiler for Python3
On 01/28/2015 07:34 PM, Steven D'Aprano wrote: Devin Jeanpierre wrote: On Wed, Jan 28, 2015 at 1:40 PM, Chris Angelico ros...@gmail.com wrote: On Thu, Jan 29, 2015 at 5:47 AM, Chris Kaynor ckay...@zindagigames.com wrote: I use Google Drive for it for all the stuff I do at home, and use SVN for all my personal projects, with the SVN depots also in Drive. The combination works well for me, I can transfer between my desktop and laptop freely, and have full revision history for debugging issues. I just do everything in git, no need for either Drive or something as old as SVN. Much easier. :) Git doesn't help if you lose your files in between commits, Sure it does? You just lose the changes made since the previous commit, but that's no different from restoring from backup. The restored file is only as up to date as the last time a backup was taken. or if you lose the entire directory between pushes. Then restore from wherever you are pushing to. But as Devin says, any backup strategy that requires the user to make a backup is untrustworthy. I'm hoping that the next generation of DVCSs will support continuous commits, the next generation of editors support continuous saves, and the only time you need interact with the editor (apart from, you know, actual editing) is to tell it start a new branch now. In emacs, bnd the git add, git commit to Ctrl-x - s, and saving also means committing. My backup system uses MD5's to decide which files need backing up, so theoretically it shouldn't cost too much to backup the git archives once daily. It's all still under development, however. (I've been offline for two weeks, developing and running the backup system, and preparing for a complete reinstall of a corrupted system) -- DaveA -- https://mail.python.org/mailman/listinfo/python-list
Usage of some pastebin service proposed
Hey guys, I've noticed a lot of people enquiring about syntactic errors and email somewhat butchers the indentation every now and then and the actual error gets buried in this mess. So is it possible to let everyone know that they need to paste their code on some site like pastebin.com and give us the link here so help can be provided better? Just a thought :) Cheers Abhiram R -- https://mail.python.org/mailman/listinfo/python-list
Re: pymongo and attribute dictionaries
Steven D'Aprano wrote: This just does not roll of the fingers well. Too many “reach for modifier keys” in a row. *One* modifier key in a row is too many? s o m e SHIFT D o c [ ' SHIFT _ i d ' ] I'm not OP, but as side note... not everyone has [ as a direct character on the keyboard. I need to press AltGr + è (and AltGr + + to get ]), so I can feel the OP lamenting :) s o m e SHIFT D o c ALTGR è ' SHIFT - i d ' ALTRG + -- By ZeD -- https://mail.python.org/mailman/listinfo/python-list
Re: Indentation issues with python
syed khalid sy...@pacificloud.com writes: I downloaded this code and am attempting to run it. I keep getting indentation error. Indentation is crucial information in Python code. If it is lost, don't waste time trying to guess it; instead, get the correct code. How did you download it? You should download the code as a “plain text” file. -- \ “I got some new underwear the other day. Well, new to me.” —Emo | `\ Philips | _o__) | Ben Finney -- https://mail.python.org/mailman/listinfo/python-list
Re: Indentation issues with python
class EventHubClient(object): ... def sendMessage(self,body,partition): ... ^ IndentationError: expected an indented block *** and 'def' is not indented as it must be. This must be covered in the tutorial. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: Usage of some pastebin service proposed
Abhiram R abhi.darkn...@gmail.com writes: I've noticed a lot of people enquiring about syntactic errors and email somewhat butchers the indentation every now and then and the actual error gets buried in this mess. It is almost never email that butchers the indentation. It is the mis-use of HTML in email. The simplest solution is: don't compose email messages in HTML. So is it possible to let everyone know that they need to paste their code on some site like pastebin.com and give us the link here so help can be provided better? Just a thought :) No, it's far better to have the code right in the body of the message where it is available to everyone viewing the message at any point in time, regardless of the temporal availability of some arbitrary URL at some third-party service. -- \ “It is well to remember that the entire universe, with one | `\ trifling exception, is composed of others.” —John Andrew Holmes | _o__) | Ben Finney -- https://mail.python.org/mailman/listinfo/python-list
