Python3: API Documentation generator
Hi all I've just switched to python3 and it turns out my current API documentation generator (epydoc) no longer works. I am looking for a tool that reads the docstrings of all classes, ... in my project and turns it into HTML documentation. Thanks for your time limyreth -- http://mail.python.org/mailman/listinfo/python-list
Re: Python3: API Documentation generator
On Sun, Sep 26, 2010 at 11:56 PM, Tim Diels fark...@gmail.com wrote: Hi all I've just switched to python3 and it turns out my current API documentation generator (epydoc) no longer works. I am looking for a tool that reads the docstrings of all classes, ... in my project and turns it into HTML documentation. Sphinx (http://sphinx.pocoo.org/ ) is the new gold standard. You'll want to enable the `autodoc` extension: http://sphinx.pocoo.org/ext/autodoc.html Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Calling an arbitrary function with the right arguments
John O'Hagan a écrit : How to call a function with the right arguments without knowing in advance which function? (snip) For most use case I can think of, I can only second Steven and Chris - if your functions are interchangeable then they should have a same API. Now there's at least one use case I know where you need to dynamically select a function then build the right arguments set for it: when mapping urls to http request handler functions. There's a good example in Django's url to view mapping system. -- http://mail.python.org/mailman/listinfo/python-list
Re: Calling an arbitrary function with the right arguments
John O'Hagan wrote:
How to call a function with the right arguments without knowing in advance
which function? For example:
import random
def f1():
pass
def f2(foo):
pass
def f3(foo, bar):
pass
foo=random.choice((1,2,3))
bar=random.choice((1,2,3))
myfunc=random.choice((f1, f2, f3))
How to call myfunc with the right arguments?
I've been doing it this way:
f1.args=()
f2.args=('foo',)
f3.args=('foo', 'bar')
args=[vars()[i] for i in myfunc.args]
myfunc(*args)
But it seems redundant to manually tag the functions with their own
arguments' names, and I don't like using vars(). Is there a nicer pattern?
You can use inspect.getargspec() to determine the argument names:
args = [vars()[argname] for argname in inspect.getargspec(myfunc).args]
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Re: Calling an arbitrary function with the right arguments
John O'Hagan wrote:
How to call a function with the right arguments without knowing in advance
which function? For example:
import random
def f1():
pass
def f2(foo):
pass
def f3(foo, bar):
pass
foo=random.choice((1,2,3))
bar=random.choice((1,2,3))
myfunc=random.choice((f1, f2, f3))
How to call myfunc with the right arguments?
I've been doing it this way:
f1.args=()
f2.args=('foo',)
f3.args=('foo', 'bar')
args=[vars()[i] for i in myfunc.args]
myfunc(*args)
But it seems redundant to manually tag the functions with their own arguments'
names, and I don't like using vars(). Is there a nicer pattern?
Regards,
John
Hi,
func, args = random.choice(((f1, ()), (f2, (foo,)), (f3, (foo, bar
func(*args)
JM
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check path.exists() with a converted path
Hi, I'm a python newbie with a problem too hard to tackle. I have a string defining a path, were all the spaces have been converted to underscores. How can I find if it corresponds to a real path? e.g. a string like '/some/path_to/directory_1/and_to/directory_2' with a real path: '/some/path_to/directory 1/and_to/directory 2' notice that the real path can contain BOTH spaces and underscores. How can I feed it to os.path.exists() ??? thanks alessandro -- http://mail.python.org/mailman/listinfo/python-list
Re: check path.exists() with a converted path
On Mon, Sep 27, 2010 at 2:23 AM, Alessandro alexxx.ma...@gmail.com wrote:
Hi, I'm a python newbie with a problem too hard to tackle.
I have a string defining a path, were all the spaces have been
converted to underscores.
How can I find if it corresponds to a real path?
e.g. a string like '/some/path_to/directory_1/and_to/directory_2'
with a real path: '/some/path_to/directory 1/and_to/directory 2'
notice that the real path can contain BOTH spaces and underscores.
How can I feed it to os.path.exists() ???
Use the `glob` module instead: http://docs.python.org/library/glob.html
from glob import glob
real_paths = glob(underscored_path.replace('_','[_ ]'))
#note: it's possible for there to be multiple matches
Cheers,
Chris
--
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--
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problem in Gasp !
Hi, I want to ask about graphics using Gasp .Attached is exercise 10 (houses at night) http://openbookproject.net/thinkCSpy/ch04.html#exercises ,if i call the draw_house function once it will work properly ,but more than one call,windows and doors disappear from some houses . Any one can advice? Thanks, house.pyw Description: Binary data -- http://mail.python.org/mailman/listinfo/python-list
Re: check path.exists() with a converted path
Alessandro alexxx.ma...@gmail.com writes: Hi, I'm a python newbie with a problem too hard to tackle. I have a string defining a path, were all the spaces have been converted to underscores. How can I find if it corresponds to a real path? e.g. a string like '/some/path_to/directory_1/and_to/directory_2' with a real path: '/some/path_to/directory 1/and_to/directory 2' notice that the real path can contain BOTH spaces and underscores. How can I feed it to os.path.exists() ??? If you just have the converted string then you can't know what the original string is, you have no way of knowing which underscores were actually underscores in the original and which where spaces. You could generate all possible candidate original strings and check for file existence, but in general there are many different original strings that will yield the same converted string, possibly more than one of those corresponds to a file that exists. -- http://mail.python.org/mailman/listinfo/python-list
Re: check path.exists() with a converted path
On Sep 27, 6:23 pm, Alessandro alexxx.ma...@gmail.com wrote: I have a string defining a path, were all the spaces have been converted to underscores. (...) notice that the real path can contain BOTH spaces and underscores. How can I feed it to os.path.exists() ??? You are losing some information, there is no other choice to test all the combinations. Something like this should do the trick (/!\ quick and dirty solution /!\) def testpath(path): tmp=path.split(_) for i in range(2**(len(tmp)-1)): res= for j in range(len(tmp)): if j0: if (i 2**(j-1))==0: res += else: res += _ res+=tmp[j] if os.path.exists(res): return True return False Raphael -- http://mail.python.org/mailman/listinfo/python-list
Re: check path.exists() with a converted path
Alessandro wrote:
Hi, I'm a python newbie with a problem too hard to tackle.
I have a string defining a path, were all the spaces have been
converted to underscores.
How can I find if it corresponds to a real path?
e.g. a string like '/some/path_to/directory_1/and_to/directory_2'
with a real path: '/some/path_to/directory 1/and_to/directory 2'
notice that the real path can contain BOTH spaces and underscores.
How can I feed it to os.path.exists() ???
$ mkdir -p aa{\ ,_}aa/bb{\ ,_}b{\ ,_}/c\ c
$ tree
.
|-- aa aa
| |-- bb b
| | `-- c c
| |-- bb b_
| | `-- c c
| |-- bb_b
| | `-- c c
| `-- bb_b_
| `-- c c
`-- aa_aa
|-- bb b
| `-- c c
|-- bb b_
| `-- c c
|-- bb_b
| `-- c c
`-- bb_b_
`-- c c
18 directories, 0 files
$ python
Python 2.6.4 (r264:75706, Dec 7 2009, 18:43:55)
[GCC 4.4.1] on linux2
Type help, copyright, credits or license for more information.
import glob
path = aa_aa/bb_b_/c_c
glob.glob(path.replace(_, [_ ]))
['aa_aa/bb b_/c c', 'aa_aa/bb_b /c c', 'aa_aa/bb b /c c', 'aa_aa/bb_b_/c c',
'aa aa/bb b_/c c', 'aa aa/bb_b /c c', 'aa aa/bb b /c c', 'aa aa/bb_b_/c c']
I didn't want to throw away my demo just because your question was already
anwered ;)
Peter
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Re: check path.exists() with a converted path
people, you're great - best newsgroup I've ever been! I think I'll go with the glob suggestion - works like a charm!!! thank you... alessandro -- http://mail.python.org/mailman/listinfo/python-list
Re: Too much code - slicing
On Thu, Sep 23, 2010 at 12:23:22AM +, Steven D'Aprano wrote: On Tue, 21 Sep 2010 16:17:48 +0200, Antoon Pardon wrote: On Tue, Sep 21, 2010 at 12:07:07AM +, Steven D'Aprano wrote: On Mon, 20 Sep 2010 19:28:49 +0200, Antoon Pardon wrote: Not necessarily. Some of us have the impression that Guido deliberatly chose an ugly format for the ternary operator. If he did, then he must have changed his mind, because there is nothing ugly about the ternary operator we ended up with. That is a question of taste Yes, it certainly is. Describing it as an ugly format is also a matter of taste -- taste which in my opinion simply isn't justified by anything other than familiarity. There is the facts that it broke familiarity with a common pattern. This form only ranked fourth (or maybe third), with the first three all wanting ar structure with the elelement is this order: condition, true case, false case Guido has alwasys been against a ternary operator but the requests kept coming. So eventually he introduced one. But the impression is that he chose an ugly format in the hope of discouraging people to use it. That's sheer and unadulterated nonsense. The fact is that Guido changed his mind about ternary if after discovering that the work-around true-clause and condition or false-clause is buggy -- it gives the wrong answer if true-clause happens to be a false value like [], 0 or None. If I recall correctly, the bug bit Guido himself. Nonsense. That the work around was buggy was known years before the ternary operator was finally introduced. But people kept forgetting it, and it bit the right person one time too many. So? That it took years between the knowledge that the work-around failed and a ternary operator finally appearing is still a fact. Which casts doubts that is was this knowledge that made him change his mind. The introduction of list comprehension made a ternary operator that more usefull but every time it came up the supporters of Guido, told us we just had to define a function if we wanted the items to depend on a condition. A function can't do the job, because it isn't lazy: def ifte(condition, x, y): if condition: return x else: return y n = 0 ifte(n != 0, 100/n, -1) will fail. This was perhaps *the* killer argument for a ternary-if operator. You really don't seem to remember what happened then. Someone would come with a problem that we can now solve as follows. ls = [ el / 2 if el % 2 == 0 else 3 * el + 1 for el in ls ] and the respons would be that we just needed to write is as follows: def f(el): if el % 2 == 0: return el / 2 else: return 3 * el + 1 ls = [ f(el) for el in ls ] -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Plone Conference 2010 schedule published
Over 400 attendees are set to meet at the 8th annual Plone Conference for a week-long programme of training, talks and developer sprints from the 25th to 31st October at the Thistle Grand Hotel in Bristol, UK. Plone Conference 2010 registrations are open. Plone, an Open Source Content Management System used throughout the world has a massive following and Plone events are held around the globe. The largest of these is the annual Plone Conference and this year will be held in the UK. Plone is used for developing websites, intranet and portals for corporations, NGOs and the public sector. Organised by Netsight Internet Solutions, it promises to bring together developers, designers, end users and business people. This year an additional event is being planned as a one-day mini-conference on the 26th October called Plone in Business which will be aimed specifically at analysts, advisors, evaluators and information professionals looking to find out more about Plone and see a showcase of successful Plone projects from across the sectors. It will also see the launch of the JBoye Plone Community of Practice. The main part of the conference, from the 27th - 29th October, has over 50 scheduled talks from speakers from 19 countries and includes an 'unconference' day in which talks will be proposed by the attendees. Plone Conference 2010 scheduled talks include: * Easier and faster Plone theming with Deliverance * Design and Development with Dexterity * Enterprise Search in Plone with Solr * Boosting productivity with Plone-driven Plone development * Brasil.gov.br: Building a digital nation with Plone Alan Runyan, co-founder of Plone and president of Enfold Systems along with Alex Limi, fellow co-founder of Plone and now Firefox User Experience Lead at Mozilla will be delivering a keynote. There will also be a guest keynote by Richard Noble, OBE, project director of the Bloodhound SSC project attempting be build a car to pass the 1,000mph land speed mark. The conference falls at a great time, with the recent release of Plone 4, a product that raises the bar in the Content Management System market with a faster, more user-friendly and more refined version of the product. So far, registrations for the conference have come from over 30 countries around the world. To find out more about the conference and to register, visit http://ploneconf2010.org. -- Matt Hamilton ma...@netsight.co.uk Netsight Internet Solutions, Ltd. Business Vision on the Internet http://www.netsight.co.uk +44 (0)117 9090901 Web Design | Zope/Plone Development and Consulting | Co-location | Hosting -- http://mail.python.org/mailman/listinfo/python-list
possible circular import problem with python-3, but not python-2
I am attempting to contribute to the h5py project by porting the code for python-3. The code is available in a branch at github: http://github.com/darrendale/h5py/tree/py3k . That code uses cython to wrap the hdf5 library. So far, only a few minor changes have been needed (relative imports, changes concerning strings/bytes), and I have been able to generate the c sources, build and install h5py for py3k. But I can't actually import the library. On Snow Leopard, using the python-3 installed via MacPorts: import h5py Traceback (most recent call last): File stdin, line 1, in module File /Users/darren/.local/lib/python3.1/site-packages/ h5py-1.3.1.dev-py3.1-macosx-10.6-x86_64.egg/h5py/__init__.py, line 34, in module from . import h5, h5a, h5d, h5f, h5fd, h5g, h5l, h5o, h5i, h5p, h5r, h5s, h5t, h5z File h5t.pxd, line 17, in init h5py.h5a (h5py/h5a.c:5248) File h5p.pxd, line 23, in init h5py.h5t (h5py/h5t.c:16481) File h5t.pxd, line 17, in init h5py.h5p (h5py/h5p.c:9297) ImportError: No module named h5t That looks like it might be a circular import problem, but it works fine with python-2.6. I'm at a loss on how to proceed, could anyone please offer a suggestion? Thanks, Darren -- http://mail.python.org/mailman/listinfo/python-list
Re: Errors with PyPdf
On Sep 27, 2:46 pm, Dave Angel da...@ieee.org wrote:
On 2:59 PM, flebber wrote:
snip
Traceback (most recent call last):
File C:/Python26/Pdfread, line 16, inmodule
open('x.txt', 'w').write(content)
NameError: name 'content' is not defined
When i use.
import pyPdf
def getPDFContent(path):
content =C:\Components-of-Dot-NET.txt
# Load PDF into pyPDF
pdf =yPdf.PdfFileReader(file(path, rb))
# Iterate pages
for i in range(0, pdf.getNumPages()):
# Extract text from page and add to content
content +=df.getPage(i).extractText() + \n
# Collapse whitespace
content = .join(content.replace(u\xa0, ).strip().split())
return content
print getPDFContent(rC:\Components-of-Dot-NET.pdf).encode(ascii,
ignore)
open('x.txt', 'w').write(content)
There's no global variable content, that was local to the function. So
it's lost when the function exits. it does return the value, but you
give it to print, and don't save it anywhere.
data = getPDFContent(rC:\Components-of-Dot-NET.pdf).encode(ascii,
ignore)
outfile = open('x.txt', 'w')
outfile.write(data)
close(outfile)
I used a different name to emphasize that this is *not* the same
variable as content inside the function. In this case, it happens to
have the same value. And if you used the same name, you could be
confused about which is which.
DaveA
Thank You everyone.
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Re: Raw Sockets - IP-Encapsulation
Hello, On Fri, Sep 24, 2010 at 04:51:01PM +0100, Nobody wrote: On Thu, 23 Sep 2010 21:41:19 +0200, Matthias Guentert wrote: I would like to create an IP tunnel using the IP protocol type 4 (socket.IPPROTO_IPIP) on a Linux host. (I also would be happy if I could create a GRE tunnel) The thing is, I just don't understand how I such a socket could be created and then later on handled. You don't create sockets for IPPROTO_IPIP or IPPROTO_GRE. Outside of the kernel, those identifiers are only likely to be used for specifying protocols when e.g. configuring packet filtering. Tunnelling only involves user-space for configuration. For GRE/IPIP this is true, but with /dev/tun and /dev/tap tunnels it isn't -- userspace program actually reads from/writes to tun/tap device file descriptor. -- With best regards, xrgtn -- http://mail.python.org/mailman/listinfo/python-list
minimal D: need software testers
Hey, I've released the second alpha for minimal-D a program I've written in python which should make developing easier. I need people to test the app on bugs and give ideas. It is written in python using the wxPython toolkit and is linux-only. (using on windows is on own risk) You can download a .deb or a .tar.gz from http://launchpad.net/minimal -- http://mail.python.org/mailman/listinfo/python-list
reduced-tagged (was Re: toy list processing problem: collect similar terms)
On Sep 26, 12:05 am, Xah Lee xah...@gmail.com wrote: I am hijacking the following post and driving it to Cuba (the Monthy Python fans will know what I refer to). I want to create a `reduce'- like function that can handle similar problems. Xah said: here's a interesting toy list processing problem. I have a list of lists, where each sublist is labelled by a number. I need to collect together the contents of all sublists sharing the same label. So if I have the list ((0 a b) (1 c d) (2 e f) (3 g h) (1 i j) (2 k l) (4 m n) (2 o p) (4 q r) (5 s t)) where the first element of each sublist is the label, I need to produce: output: ((a b) (c d i j) (e f k l o p) (g h) (m n q r) (s t)) stuffed deleted. Here is my Common Lisp (and I only care about Common Lisp answers) attempt to create a `reduce'-like function to handle this kind of a problem (you will see that I am still struggling with the code and the documentation). (defun reduce-tagged (function sequence key (key-tag #'first) (key-datum #'rest)) Use a binary operation, `function' to combine a sequence of tagged elements. like-tagged elements are `reduce'd according to `function' and returned in a list ... `sequence' is a sequence of tagged elements. reduce-m will reduce like-tagged-elements. If `key-tag' is supplied it is used to extract the element tag. If `key-tag' is not supplied, the function `first' is used. If `key-datum' is supplied, it is used to extract the element datum. If `key-datum' is not supplied, the function `rest' is used. (let ((hash (make-hash-table))) (dolist (datum sequence) (let ((tag (funcall key-tag datum)) (values (funcall key-datum datum))) (multiple-value-bind (it present) (gethash tag hash) (if present (setf (gethash tag hash) (apply function (gethash tag hash) values)) (setf (gethash tag hash) values) (let (result) (dohash (key value hash) (push (list key value) result)) result))) Comments, improvements? I am looking for a general purpose function like reduce that I can apply in various situations. Thanks, Mirko -- http://mail.python.org/mailman/listinfo/python-list
Re: reduce-tagged (was Re: toy list processing problem: collect similar terms)
On Sep 27, 11:18 am, Mirko mirko.vuko...@gmail.com wrote: On Sep 26, 12:05 am, Xah Lee xah...@gmail.com wrote: I am hijacking the following post and driving it to Cuba (the Monthy Python fans will know what I refer to). I want to create a `reduce'- like function that can handle similar problems. Xah said: here's a interesting toy list processing problem. I have a list of lists, where each sublist is labelled by a number. I need to collect together the contents of all sublists sharing the same label. So if I have the list ((0 a b) (1 c d) (2 e f) (3 g h) (1 i j) (2 k l) (4 m n) (2 o p) (4 q r) (5 s t)) where the first element of each sublist is the label, I need to produce: output: ((a b) (c d i j) (e f k l o p) (g h) (m n q r) (s t)) stuffed deleted. Here is my Common Lisp (and I only care about Common Lisp answers) attempt to create a `reduce'-like function to handle this kind of a problem (you will see that I am still struggling with the code and the documentation). (defun reduce-tagged (function sequence key (key-tag #'first) (key-datum #'rest)) Use a binary operation, `function' to combine a sequence of tagged elements. like-tagged elements are `reduce'd according to `function' and returned in a list ... `sequence' is a sequence of tagged elements. reduce-m will reduce like-tagged-elements. If `key-tag' is supplied it is used to extract the element tag. If `key-tag' is not supplied, the function `first' is used. If `key-datum' is supplied, it is used to extract the element datum. If `key-datum' is not supplied, the function `rest' is used. (let ((hash (make-hash-table))) (dolist (datum sequence) (let ((tag (funcall key-tag datum)) (values (funcall key-datum datum))) (multiple-value-bind (it present) (gethash tag hash) (if present (setf (gethash tag hash) (apply function (gethash tag hash) values)) (setf (gethash tag hash) values) (let (result) (dohash (key value hash) (push (list key value) result)) result))) Comments, improvements? I am looking for a general purpose function like reduce that I can apply in various situations. Thanks, Mirko Correction: the previous code used a non-portable clisp macro `dohash' (looks nice, doesn't it?) Here is the version with maphash: (defun reduce-tagged (function sequence key (key-tag #'first) (key-datum #'rest)) Use a binary operation, `function' to combine a sequence of tagged elements. like-tagged elements are `reduce'd according to `function' `sequence' is a sequence of tagged elements. reduce-m will reduce like-tagged-elements. If `key-tag' is supplied it is used to extract the element tag. If `key-tag' is not supplied, the function `first' is used. If `key-datum' is supplied, it is used to extract the element datum. If `key-datum' is not supplied, the function `rest' is used. (let ((hash (make-hash-table))) (dolist (datum sequence) (let ((tag (funcall key-tag datum)) (values (funcall key-datum datum))) (multiple-value-bind (it present) (gethash tag hash) (declare (ignore it)) (if present (setf (gethash tag hash) (apply function (gethash tag hash) values)) (setf (gethash tag hash) values) (let (result) (maphash #'(lambda(key value) (push (list key value) result)) hash) result))) Mirko -- http://mail.python.org/mailman/listinfo/python-list
Introducing Kids to Programming: 2 or 3?
Hi there I'm sure you get a lot of 2 or 3 questions, but here's another. Umonya [1] uses Python to introduce school kids to programming. The initiative is only 15 months old and up till now we've been using existing notes and exercises and thus Python 2. But we're at the stage where we can either stick with 2 for the next few years, or go to 3 now. We received a grant from Google to reach 1,000 kids in South Africa with our course in 2011. People have also shown interest in running the course in Croatia, Poland and Egypt. We're also eyeing developing African countries in the long-term. As such, we're taking the time now to write our very own specialised course notes and exercises, and we this is why we need to decide *now* which path to take: 2 or 3? As we will be translating the notes we'll probably stick with out choice for the next few years. Since these are kids, we feel the nice changes in 3 such as removing integer division will help in teaching. It will also remove confusion when they go to download Python and grab the latest version. Since they're just starting, chances are almost none will be hit by the limited library support for at least a year or two. They will, however, be hit by the confusion of seeing Python 2 code all over the web. We're tending towards 3, but I am a little cautious myself. Marco [1] http://umonya.co.za -- Marco Gallotta MSc Student Department of Computer Science, University of Cape Town people.cs.uct.ac.za/~mgallott | marco-za.blogspot.com marco AT gallotta DOT co DOT za | 073 170 | 021 552 2731 -- http://mail.python.org/mailman/listinfo/python-list
Re: reduce-tagged (was Re: toy list processing problem: collect similar terms)
On Sep 27, 11:40 am, Mirko mirko.vuko...@gmail.com wrote: On Sep 27, 11:18 am, Mirko mirko.vuko...@gmail.com wrote: On Sep 26, 12:05 am, Xah Lee xah...@gmail.com wrote: I am hijacking the following post and driving it to Cuba (the Monthy Python fans will know what I refer to). I want to create a `reduce'- like function that can handle similar problems. Xah said: here's a interesting toy list processing problem. I have a list of lists, where each sublist is labelled by a number. I need to collect together the contents of all sublists sharing the same label. So if I have the list ((0 a b) (1 c d) (2 e f) (3 g h) (1 i j) (2 k l) (4 m n) (2 o p) (4 q r) (5 s t)) where the first element of each sublist is the label, I need to produce: output: ((a b) (c d i j) (e f k l o p) (g h) (m n q r) (s t)) stuffed deleted. Here is my Common Lisp (and I only care about Common Lisp answers) attempt to create a `reduce'-like function to handle this kind of a problem (you will see that I am still struggling with the code and the documentation). ... faulty code deleted Aaand one more fix (apply - funcall) (This version at least produces a close facsimile of the desired output) (defun reduce-tagged (function sequence key (key-tag #'first) (key-datum #'rest)) Use a binary operation, `function' to combine a sequence of tagged elements. like-tagged elements are `reduce'd according to `function' `sequence' is a sequence of tagged elements. reduce-m will reduce like-tagged-elements. If `key-tag' is supplied it is used to extract the element tag. If `key-tag' is not supplied, the function `first' is used. If `key-datum' is supplied, it is used to extract the element datum. If `key-datum' is not supplied, the function `rest' is used. (let ((hash (make-hash-table))) (dolist (datum sequence) (let ((tag (funcall key-tag datum)) (values (funcall key-datum datum))) (multiple-value-bind (it present) (gethash tag hash) (declare (ignore it)) (if present (setf (gethash tag hash) (funcall function (gethash tag hash) values)) (setf (gethash tag hash) values) (let (result) (maphash #'(lambda(key value) (push (list key value) result)) hash) result))) -- http://mail.python.org/mailman/listinfo/python-list
Re: Introducing Kids to Programming: 2 or 3?
On Mon, 27 Sep 2010 17:48:06 +0200 Marco Gallotta ma...@gallotta.co.za wrote: Since these are kids, we feel the nice changes in 3 such as removing integer division will help in teaching. It will also remove confusion when they go to download Python and grab the latest version. Since they're just starting, chances are almost none will be hit by the limited library support for at least a year or two. That's your answer right there. They will, however, be hit by the confusion of seeing Python 2 code all over the web. Good point. Here is may suggestion: Make the kids aware of the 2/3 issue as early as possible, but don't go into detail. Maybe start with the obligatory Hello world program, and a few other simple things. Then, when you get to the how do help myself on the net part of the course (you're including that, right?), you make strong distinction between Py2 and Py3 and tell them to make absolutely certain that it's Python 3 code they're looking at. Maybe give the print() syntax as a hint, but have them rely on more explicit descriptions that come with the code. Later on (once they know more programming constructs to appreciate the differences), include another lecture, specifically on the difference between Python 2 and Python 3. Disclaimer: I'm not an educator. Maybe this is horrible advice. Someone with a better understanding of kids' and learner's minds please debunk any nonsense I may have spouted here. I just like to go by the general rule that, unlike adults, most kids aren't idiots. /W -- INVALID? DE! -- http://mail.python.org/mailman/listinfo/python-list
Konya - Turkish Company Directory - NEW ! - Seyfi Suna www.een.kso.org.tr
Konya - Turkish Company Directory - NEW ! - Seyfi Suna www.een.kso.org.tr http://www.een.kso.org.tr/en/konya-firma-rehberi/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Python3: API Documentation generator
On 27/09/2010 09:02, Chris Rebert wrote:
On Sun, Sep 26, 2010 at 11:56 PM, Tim Dielsfark...@gmail.com wrote:
Hi all
I've just switched to python3 and it turns out my current API documentation
generator (epydoc) no longer works. I am looking for a tool that reads the
docstrings of all classes, ... in my project and turns it into HTML
documentation.
Sphinx (http://sphinx.pocoo.org/ ) is the new gold standard. You'll
want to enable the `autodoc` extension:
http://sphinx.pocoo.org/ext/autodoc.html
Cheers,
Chris
--
http://blog.rebertia.com
I tried, but it fails to run through python code that's not backwards
compatible with older python versions.
It fails with: ...autodoc can't import/find module 'pytilities', it
reported error: invalid syntax (overload.py, line 55)...
This is line 55 (runs in python3, not in python):
def process_args(self, *args, kwargs={})
Greetings
Tim (limyreth)
--
http://mail.python.org/mailman/listinfo/python-list
Re: Strong typing vs. strong testing
On 27 set, 05:46, TheFlyingDutchman zzbba...@aol.com wrote: On Sep 27, 12:58 am, p...@informatimago.com (Pascal J. Bourguignon) wrote: RG rnospa...@flownet.com writes: In article 7df0eb06-9be1-4c9c-8057-e9fdb7f0b...@q16g2000prf.googlegroups.com, TheFlyingDutchman zzbba...@aol.com wrote: On Sep 22, 10:26 pm, Scott L. Burson sc...@ergy.com wrote: This might have been mentioned here before, but I just came across it: a 2003 essay by Bruce Eckel on how reliable systems can get built in dynamically-typed languages. It echoes things we've all said here, but I think it's interesting because it describes a conversion experience: Eckel started out in the strong-typing camp and was won over. https://docs.google.com/View?id=dcsvntt2_25wpjvbbhk -- Scott If you are writing a function to determine the maximum of two numbers passed as arguents in a dynamic typed language, what is the normal procedure used by Eckel and others to handle someone passing in invalid values - such as a file handle for one varible and an array for the other? The normal procedure is to hit such a person over the head with a stick and shout FOO. Moreover, the functions returning the maximum may be able to work on non-numbers, as long as they're comparable. What's more, there are numbers that are NOT comparable by the operator you're thinking about!. So to implement your specifications, that function would have to be implemented for example as: (defmethod lessp ((x real) (y real)) ( x y)) (defmethod lessp ((x complex) (y complex)) (or ( (real-part x) (real-part y)) (and (= (real-part x) (real-part y)) ( (imag-part x) (imag-part y) (defun maximum (a b) (if (lessp a b) b a)) And then the client of that function could very well add methods: (defmethod lessp ((x symbol) (y t)) (lessp (string x) y)) (defmethod lessp ((x t) (y symbol)) (lessp x (string y))) (defmethod lessp ((x string) (y string)) (string x y)) and call: (maximum 'hello WORLD) -- WORLD and who are you to forbid it!? -- __Pascal Bourguignon__ http://www.informatimago.com/-Hide quoted text - - Show quoted text - in C I can have a function maximum(int a, int b) that will always work. Never blow up, and never give an invalid answer. If someone tries to call it incorrectly it is a compile error. In a dynamic typed language maximum(a, b) can be called with incorrect datatypes. Even if I make it so it can handle many types as you did above, it could still be inadvertantly called with a file handle for a parameter or some other type not provided for. So does Eckel and others, when they are writing their dynamically typed code advocate just letting the function blow up or give a bogus answer, or do they check for valid types passed? If they are checking for valid types it would seem that any benefits gained by not specifying type are lost by checking for type. And if they don't check for type it would seem that their code's error handling is poor. that is a lie. Compilation only makes sure that values provided at compilation-time are of the right datatype. What happens though is that in the real world, pretty much all computation depends on user provided values at runtime. See where are we heading? this works at compilation time without warnings: int m=numbermax( 2, 6 ); this too: int a, b, m; scanf( %d, a ); scanf( %d, b ); m=numbermax( a, b ); no compiler issues, but will not work just as much as in python if user provides foo and bar for a and b... fail. What you do if you're feeling insecure and paranoid? Just what dynamically typed languages do: add runtime checks. Unit tests are great to assert those. Fact is: almost all user data from the external words comes into programs as strings. No typesystem or compiler handles this fact all that graceful... -- http://mail.python.org/mailman/listinfo/python-list
relative imports and sub-module execution
Hi, After reading couple of docs and articles, I have implemented a simple test package with nested modules. When running main.py, everything is working fine. Some of my sub- modules has some small test routines for debug purpose. It's because I am using relative package imports at the top, I am not able to run these sub modules individually. For example, this works when running from main.py Here is example structure main.py __init__.py core/ __init__.py folder1 __init__.py f1a.py f1b.py folder2 __init__.py f2a.py f2b.py in folder2/f2b.py, I am importing from core.folder1 import f1a print f1a.myvar Now I can't execute 'f2b.py' individually. It's giving an error: ImportError: No module named core.folder2 Is this mean when you have created a package where modules are using relative imports, they can't execute individually? Another solution that I have discovered is using sys.path. Check this: import sys import os sys.path.append(os.path.abspath(../../)) from core.folder1 import f1a print f1a.myvar This works fine and easier too. I can execute modules individually as well as package is also working. Are there any disadvantages when using above technique? Couple of articles suggests that this is a bad practice and should not be used. Need some clarifications. Thanks Prashant -- http://mail.python.org/mailman/listinfo/python-list
Re: Introducing Kids to Programming: 2 or 3?
On 9/27/2010 11:48 AM, Marco Gallotta wrote: Hi there I'm sure you get a lot of 2 or 3 questions, but here's another. Umonya [1] uses Python to introduce school kids to programming. The initiative is only 15 months old and up till now we've been using existing notes and exercises and thus Python 2. But we're at the stage where we can either stick with 2 for the next few years, or go to 3 now. We received a grant from Google to reach 1,000 kids in South Africa with our course in 2011. People have also shown interest in running the course in Croatia, Poland and Egypt. We're also eyeing developing African countries in the long-term. As such, we're taking the time now to write our very own specialised course notes and exercises, and we this is why we need to decide *now* which path to take: 2 or 3? As we will be translating the notes we'll probably stick with out choice for the next few years. I would absolutely, definitely, move to Python3, with the the intention of using 3.2 when it comes out in a few months. I suspect that most of your exercise code will need little change beyond what 2to3 does for you. Since these are kids, we feel the nice changes in 3 such as removing integer division will help in teaching. There are several half-finished transitions in late 2.x. Removal of old-style classes, not only as the default, but completely, removes a source of confusion. The range/xrange confusion is gone. The input/raw_imput confusion is gome. I think most important for an international project is the shift to unicode as the default text type, including for identifiers. Kids who are not masters of English will want to write identifiers in their own language. It will also remove confusion when they go to download Python and grab the latest version. Since they're just starting, chances are almost none will be hit by the limited library support for at least a year or two. I personally consider this pretty irrelevant for teaching programming to kids. There is a *lot* in the stdlib to work with. And stdlib improvement is getting special emphasis for 3.2. Bug fixes may be backported, feature additions are not. Even if one disagrees, 3rd-party library support is improving and will continue to improve especially after 3.2 is released. For instance, the recent release of numpy for 3.1 enables conversions that were blocked waiting for that. http://sourceforge.net/projects/numpy/files/NumPy/1.5.0/numpy-1.5.0-win32-superpack-python3.1.exe/download For another example, the web-sig appears to have agreed on a minimal, backward-compatible extension to PEP 333 to make wsgi work with Python3. This will be PEP . (It appears the problem was too many choices rather than no choice. Discussion continues on more extensive non-compatible changes.) This will allow existing wsgi tools to both work with Python3 *and* continue to be intercompatible. (The latter was the problem. If each tool made its own non-standard choice for Python3, that latter property would be lost.) -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Python3: API Documentation generator
On 9/27/2010 1:15 PM, Tim Diels wrote:
On 27/09/2010 09:02, Chris Rebert wrote:
On Sun, Sep 26, 2010 at 11:56 PM, Tim Dielsfark...@gmail.com wrote:
Hi all
I've just switched to python3 and it turns out my current API
documentation
generator (epydoc) no longer works. I am looking for a tool that
reads the
docstrings of all classes, ... in my project and turns it into HTML
documentation.
Sphinx (http://sphinx.pocoo.org/ ) is the new gold standard. You'll
want to enable the `autodoc` extension:
http://sphinx.pocoo.org/ext/autodoc.html
Cheers,
Chris
--
http://blog.rebertia.com
I tried, but it fails to run through python code that's not backwards
compatible with older python versions.
It fails with: ...autodoc can't import/find module 'pytilities', it
reported error: invalid syntax (overload.py, line 55)...
This is line 55 (runs in python3, not in python):
def process_args(self, *args, kwargs={})
Unless the autodoc doc says that it does not work with all Python3 code,
that strikes me as a bug (a new 3.x feature that was overlooked) that
should be reported. The sphinx tracker is linked on the sphinx homepage
http://bitbucket.org/birkenfeld/sphinx/issues/
There is also a link to a google group for sphinx.
Does epydoc not work because is does not run on 3.1 or because it also
chokes when fed the above code.
In the meanwhile, you could change the api ;-).
--
Terry Jan Reedy
--
http://mail.python.org/mailman/listinfo/python-list
Re: Python3: API Documentation generator
On Mon, Sep 27, 2010 at 1:15 PM, Tim Diels limyr...@gmail.com wrote:
On 27/09/2010 09:02, Chris Rebert wrote:
On Sun, Sep 26, 2010 at 11:56 PM, Tim Dielsfark...@gmail.com wrote:
Hi all
I've just switched to python3 and it turns out my current API
documentation
generator (epydoc) no longer works. I am looking for a tool that reads
the
docstrings of all classes, ... in my project and turns it into HTML
documentation.
Sphinx (http://sphinx.pocoo.org/ ) is the new gold standard. You'll
want to enable the `autodoc` extension:
http://sphinx.pocoo.org/ext/autodoc.html
Cheers,
Chris
--
http://blog.rebertia.com
I tried, but it fails to run through python code that's not backwards
compatible with older python versions.
It fails with: ...autodoc can't import/find module 'pytilities', it reported
error: invalid syntax (overload.py, line 55)...
This is line 55 (runs in python3, not in python):
def process_args(self, *args, kwargs={})
As far as I'm aware, autodoc works by importing the modules and then
reading doctext straight from the __doc__ attributes.
So the module in question has to import correctly in whatever
interpreter Sphinx is using. You probably need to install Sphinx with
python3 to get it to use the right interpreter. If you're using
easy_install or pip, check if you have an easy_install-3.1 or pip-3.1
(or similar) script installed.
--
http://mail.python.org/mailman/listinfo/python-list
Re: (and scheme lisp) x Python and modern langs [was Re: gossip, Guy Steel, Lojban, Racket]
2010-09-27 For instance, this is far more convenient: [x+1 for x in [1,2,3,4,5] if x%2==0] than this: map(lambda x:x+1,filter(lambda x:x%2==0,[1,2,3,4,5])) How about this: LC(func, inputList, P) compared to [func for myVar in inputList if P] the functional form is: • shorter • not another idiysyncratic new syntax now, a separate issue. Suppose we want some “list comprehension” feature in a functional lang. Normally, by default this can be done by filter( map(func, inputList), Predicate) but perhaps this usage is so frequent that we want to create a new fuction for it, to make it more convenient, and perhaps easier to make the compiler to optimize more. e.g. LC(func, inputList, Predicate) this is about whether a lang should create a new convenient function that otherwise require 2 function combinations. Common Lisp vs Scheme Lisp are the typical example of extreme opposites. note, there's no new syntax involved. Now, let's consider another separated issue related to so-called “list comprehension”. Suppose we decided that generating list by a filter is so frequently used that it worth it to create a new func for it. LC(func, inputList, Predicate) Now, in functional langs, in general a design principle is that you want to reduce the number of function unless you really need. Because, any combination of list related functions could potentionally be a new function in your lang. So, if we really think LC is useful, we might want to generalize it. e.g. in LC(func, inputList, Predicate) is it worthwhile say to add a 4th param, that says return just the first n? (here we presume the lang doesn't support list of infinite elements) e.g. LC(func, inputList, Predicate, n) what about partition the list to m sublists? LC(func, inputList, Predicate, n, m) what about actualy more generalized partition, by m sublist then by m1 sublist then by m2 sublist? LC(func, inputList, Predicate, n, list(m,m1,m2,...)) what about sorting? maybe that's always used together when you need a list? LC(func, inputList, Predicate, n, list(m,m1,m2,...), sortPredcate) what if actually frequently we want LC to map parallel to branches? e.g. LC(func, inputList, Predicate, n, list(m,m1,m2,...), sortPredcate, mapBranch:True) what if ... you see, each of these or combination of these can be done by default in the lang by sequenceing one or more functions (i.e. composition). But when we create a new function, we really should think a lot about its justification, because otherwise the lang becomes a bag of functions that are non-essential, confusing. In summary: • “list comprehension” is a bad jargon. • The concept of “list comprehension” is redundant. There's no justification for the concept to exist except historical. • The syntax of “list comprehension” in most lang is ad hoc syntax. for those who find imperative lang good, then perhaps “list comprehension” is good, because it adds another idiosyncratic syntax to the lang, but such is with the tradition of imperative langs. The ad hoc syntax aids in reading code by various syntactical forms and hint words such as “[... for ... in ...]”. Xah ∑ xahlee.org ☄ -- http://mail.python.org/mailman/listinfo/python-list
Re: (and scheme lisp) x Python and modern langs [was Re: gossip, Guy Steel, Lojban, Racket]
On 27 set, 16:06, Xah Lee xah...@gmail.com wrote: 2010-09-27 For instance, this is far more convenient: [x+1 for x in [1,2,3,4,5] if x%2==0] than this: map(lambda x:x+1,filter(lambda x:x%2==0,[1,2,3,4,5])) How about this: [snip] how about this: read before replying. -- http://mail.python.org/mailman/listinfo/python-list
Re: Introducing Kids to Programming: Scratch
My son has been writing games using MIT's Scratch. It is visual and highly interactive. In an afternoon he can build something that looks cool to him, is interactive, and that he can share with others. It's not Python but he is learning how to make the tools do what he wants and he is getting results. He's 8 years old. http://scratch.mit.edu For introducing kids to programming, I recommend Scratch. Kee Nethery -- http://mail.python.org/mailman/listinfo/python-list
Re: Strong typing vs. strong testing
namekuseijin namekusei...@gmail.com writes: in C I can have a function maximum(int a, int b) that will always work. Never blow up, and never give an invalid answer. If someone tries to call it incorrectly it is a compile error. In a dynamic typed language maximum(a, b) can be called with incorrect datatypes. Even if I make it so it can handle many types as you did above, it could still be inadvertantly called with a file handle for a parameter or some other type not provided for. So does Eckel and others, when they are writing their dynamically typed code advocate just letting the function blow up or give a bogus answer, or do they check for valid types passed? If they are checking for valid types it would seem that any benefits gained by not specifying type are lost by checking for type. And if they don't check for type it would seem that their code's error handling is poor. that is a lie. Compilation only makes sure that values provided at compilation-time are of the right datatype. What happens though is that in the real world, pretty much all computation depends on user provided values at runtime. See where are we heading? this works at compilation time without warnings: int m=numbermax( 2, 6 ); this too: int a, b, m; scanf( %d, a ); scanf( %d, b ); m=numbermax( a, b ); no compiler issues, but will not work just as much as in python if user provides foo and bar for a and b... fail. What you do if you're feeling insecure and paranoid? Just what dynamically typed languages do: add runtime checks. Unit tests are great to assert those. Fact is: almost all user data from the external words comes into programs as strings. No typesystem or compiler handles this fact all that graceful... I would even go further. Types are only part of the story. You may distinguish between integers and floating points, fine. But what about distinguishing between floating points representing lengths and floating points representing volumes? Worse, what about distinguishing and converting floating points representing lengths expressed in feets and floating points representing lengths expressed in meters. If you start with the mindset of static type checking, you will consider that your types are checked and if the types at the interface of two modules matches you'll think that everything's ok. And six months later you Mars mission will crash. On the other hand, with the dynamic typing mindset, you might even wrap your values (of whatever numerical type) in a symbolic expression mentionning the unit and perhaps other meta data, so that when the other module receives it, it may notice (dynamically) that two values are not of the same unit, but if compatible, it could (dynamically) convert into the expected unit. Mission saved! -- __Pascal Bourguignon__ http://www.informatimago.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Strong typing vs. strong testing
Pascal J. Bourguignon wrote: On the other hand, with the dynamic typing mindset, you might even wrap your values (of whatever numerical type) in a symbolic expression mentionning the unit and perhaps other meta data, so that when the other module receives it, it may notice (dynamically) that two values are not of the same unit, but if compatible, it could (dynamically) convert into the expected unit. Mission saved! In fairness, you could do this statically too, and without the consing required by the dynamic approach. -- Scott -- http://mail.python.org/mailman/listinfo/python-list
Re: Strong typing vs. strong testing
Scott L. Burson sc...@ergy.com writes: Pascal J. Bourguignon wrote: On the other hand, with the dynamic typing mindset, you might even wrap your values (of whatever numerical type) in a symbolic expression mentionning the unit and perhaps other meta data, so that when the other module receives it, it may notice (dynamically) that two values are not of the same unit, but if compatible, it could (dynamically) convert into the expected unit. Mission saved! In fairness, you could do this statically too, and without the consing required by the dynamic approach. I don't deny it. My point is that it's a question of mindset. -- __Pascal Bourguignon__ http://www.informatimago.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: toy list processing problem: collect similar terms
On Sep 26, 12:05 am, Xah Lee xah...@gmail.com wrote:
here's a interesting toy list processing problem.
I have a list of lists, where each sublist is labelled by
a number. I need to collect together the contents of all sublists
sharing
the same label. So if I have the list
((0 a b) (1 c d) (2 e f) (3 g h) (1 i j) (2 k l) (4 m n) (2 o p) (4 q
r) (5 s t))
where the first element of each sublist is the label, I need to
produce:
output:
((a b) (c d i j) (e f k l o p) (g h) (m n q r) (s t))
Here is a solution in Perl -- the verbose version. Please see my note
below.
SCRIPT:
use strict;
use warnings;
my %lists;
while (DATA)
{
chomp;
my ($k, @v) = split(/ /, $_);
push(@{$lists{$k}}, @v);
}
foreach my $k (sort keys %lists)
{
print $k - @{$lists{$k}}\n;
}
exit(0);
__DATA__
0 a b
1 c d
2 e f
3 g h
1 i j
2 k l
4 m n
2 o p
4 q r
5 s t
OUTPUT:
perl lists.plx
0 - a b
1 - c d i j
2 - e f k l o p
3 - g h
4 - m n q r
5 - s t
NOTE:
I assume that you want an idiomatic solution for the language. I have
therefore converted your data into a typical record oriented
structure. Perlistas don't use parenthesis. If you want a Lispy
solution, use Lisp. Further, Perl was made for exactly this kind of
problem, which is simple data munging, taking some input, transforming
it, and printing it out -- Practical Extraction and Reporting
Language. I know that some Lispers (R.G., are you reading?) will
object to a formulation like this: @{$lists{$k}}, but all this says
(in Perl) is to spit out the value contained in the hash element
$lists{$k} as an array, and is good idiomatic Perl, even if some
Lispers aren't quite up to the task of understanding it.
CC.
--
http://mail.python.org/mailman/listinfo/python-list
Re: [ctpug] Introducing Kids to Programming: 2 or 3?
On Mon, Sep 27, 2010 at 5:48 PM, Marco Gallotta ma...@gallotta.co.za wrote: We received a grant from Google to reach 1,000 kids in South Africa with our course in 2011. People have also shown interest in running the course in Croatia, Poland and Egypt. We're also eyeing developing African countries in the long-term. As such, we're taking the time now to write our very own specialised course notes and exercises, and we this is why we need to decide *now* which path to take: 2 or 3? As we will be translating the notes we'll probably stick with out choice for the next few years. If you were going to start running the course tomorrow I'd suggest sticking with Python 2. Python 3 ports are rapidly becoming available but few have had the bugs shaken out of them yet. In three or four months I expect that the important bugs will have been dealt with. Given that 2.x will not receive any new features, I think it is effectively dead. I would explicitly mention the existence of 2.7 and 3.2 [1] to students (perhaps near the end of the first day or whenever they're about to go off and download Python for themselves). One caveat is that web applications may only start to migrate to 3.x late next year. There are a number of reasons for this. First it's not yet clear what form the WSGI standard will take under Python 3 (and if 3.2 is released before this decision is made it will effectively have to wait for 3.3 to be included). Secondly the software stack involved is quite deep in some places. For example, database support might require porting MySQLdb, then SQLAlchemy, then the web framework and only after that the web application itself. [1] Which should hopefully make it out before 2011. :) Schiavo Simon -- http://mail.python.org/mailman/listinfo/python-list
Re: (and scheme lisp) x Python and modern langs [was Re: gossip, Guy Steel, Lojban, Racket]
On Sep 27, 12:11 pm, namekuseijin namekusei...@gmail.com wrote: On 27 set, 16:06, Xah Lee xah...@gmail.com wrote: 2010-09-27 For instance, this is far more convenient: [x+1 for x in [1,2,3,4,5] if x%2==0] than this: map(lambda x:x+1,filter(lambda x:x%2==0,[1,2,3,4,5])) How about this: [snip] how about this: read before replying. hum??? i read your post quite carefully, and rather thought i replied well. In fact, i really wanted to tell you “read before replying” before but refrained from making any of that expression. here's 2 previous posts about list compre. http://groups.google.com/group/comp.lang.lisp/msg/145f6ecf29ebbdaf http://groups.google.com/group/comp.lang.lisp/msg/62ca84062c9fcdca Xah -- http://mail.python.org/mailman/listinfo/python-list
Re: program organization question for web development with python
On Sep 17, 2:36 am, Bruno Desthuilliers bruno. 42.desthuilli...@websiteburo.invalid wrote: Hans a écrit : (snip) Maybe I did not make my question clear. I never tried python web programing before, so I want to start from CGI. You can indeed learn quite a few things doing raw CGI - the most important one being why frameworks are a good idea !-) I read something about web framework like django, but seems it's a little bit complicated. Not that much IMHO, but being an early django user I'm probably a bit biased. Now Python is known as the language with more web frameworks than keywords, so you could probably check some lighter framework like web.py (http://webpy.org/) or flask (http://flask.pocoo.org/). my task is actually very simple: get search string from input, and then search database, print search result. I thought CGI should be good enough to do this. CGI is good enough to do any web stuff - just like assembler is good enough to write any application !-) I don't have any idea about how to organize those cgi codes, so what I'm asking is: 1. do I have to have each single file for each hyper-link? Can I put them together? how? 2. how can I pass a db_cursor to another file? can I use db_cursor as a parameter? Obviously not. FWIW, both questions show a lack of understanding of the HTTP protocol, and you can't hope to do anything good in web programming if you don't understand at least the basics of the HTTP protocol, specially the request/response cycle. Now for a couple more practical answers: There are basically two ways to organize your url = code mapping: 1/ have only one cgi script and use querystring params to tell which action should be executed. 2/ have one cgi script per action. The choice is up to you. For a simple app like yours, the first solution is probably the most obvious : always display the seach form, if the user submitted the form also display the result list. That's how google works (wrt/ user interface I mean). Now if you still need / want to have distinct scripts and want to factor out some common code, you just put the common code in a module that you import from each script. Thank you very much! I got your meaning. The choice 1 is definitely what I want, I just cannot think about this idea by myself. Thank you again! -- http://mail.python.org/mailman/listinfo/python-list
Nautilus Python
I'm a python noob and wrote the following code for a nautilus extension:
#!/usr/local/bin/python
# -*- coding: utf-8 -*-
import urllib
import gtk
import pygtk
import nautilus
import gconf
import gtk.glade
class Slide (nautilus.MenuProvider):
f = None
def __init__(self):
self.client = gconf.client_get_default()
self.f = gtk.glade.XML( papel.glade )
self.window = self.f.get_widget(window1)
gtk.main()
def oi (self):
self.window.show()
def menu_activate_cb(self, menu, file):
self.oi()
def get_file_items(self, window,files):
if len(files) != 1:
return
item =
nautilus.MenuItem('NautilusPython::slide_file_item','Slide','Slide')
item.connect('activate', self.menu_activate_cb, files[0])
return item,
def get_background_items(self, window, file):
item = nautilus.MenuItem('NautilusPython::slide_item','Slide','Slide')
item.connect('activate', self.menu_background_activate_cb, file)
return item,
def menu_background_activate_cb(self, menu, file):
self.oi()
But it doesn't work. If I comment the lines:
self.f = gtk.glade.XML( papel.glade )
self.window = self.f.get_widget(window1)
gtk.main()
the code works but I can't see any problem in those lines. Any help?
--
http://mail.python.org/mailman/listinfo/python-list
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strange results from sys.version
I am trying to help a user of my xlrd package who says he is getting anomalous results on his work computer but not on his home computer. Attempts to reproduce his alleged problem in a verifiable manner on his work computer have failed, so far ... the only meaning difference in script output is in sys.version User (work): sys.version: 2.7 (r27:82500, Aug 23 2010, 17:18:21) etc Me : sys.version: 2.7 (r27:82525, Jul 4 2010, 09:01:59) etc I have just now downloaded the Windows x86 msi from www.python.org and reinstalled it on another computer. It gives the same result as on my primary computer (above). User result looks whacked: lower patch number, later date. www.python.org says Python 2.7 was released on July 3rd, 2010. Is it possible that the work computer is using an unofficial release? What other possibilities are there? Thanks in advance ... -- http://mail.python.org/mailman/listinfo/python-list
Re: strange results from sys.version
On 9/27/10 6:01 PM, John Machin wrote: I am trying to help a user of my xlrd package who says he is getting anomalous results on his work computer but not on his home computer. Attempts to reproduce his alleged problem in a verifiable manner on his work computer have failed, so far ... the only meaning difference in script output is in sys.version User (work): sys.version: 2.7 (r27:82500, Aug 23 2010, 17:18:21) etc Me : sys.version: 2.7 (r27:82525, Jul 4 2010, 09:01:59) etc I have just now downloaded the Windows x86 msi from www.python.org and reinstalled it on another computer. It gives the same result as on my primary computer (above). User result looks whacked: lower patch number, later date. www.python.org says Python 2.7 was released on July 3rd, 2010. Is it possible that the work computer is using an unofficial release? What other possibilities are there? ActivePython 2.7.0.2 was released on Aug 25: http://downloads.activestate.com/ActivePython/releases/2.7.0.2/ -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
Re: strange results from sys.version
On 2010-09-27, at 4:30 PM, Robert Kern wrote: On 9/27/10 6:01 PM, John Machin wrote: I am trying to help a user of my xlrd package who says he is getting anomalous results on his work computer but not on his home computer. Attempts to reproduce his alleged problem in a verifiable manner on his work computer have failed, so far ... the only meaning difference in script output is in sys.version User (work): sys.version: 2.7 (r27:82500, Aug 23 2010, 17:18:21) etc Me : sys.version: 2.7 (r27:82525, Jul 4 2010, 09:01:59) etc I have just now downloaded the Windows x86 msi from www.python.org and reinstalled it on another computer. It gives the same result as on my primary computer (above). User result looks whacked: lower patch number, later date. www.python.org says Python 2.7 was released on July 3rd, 2010. Is it possible that the work computer is using an unofficial release? What other possibilities are there? ActivePython 2.7.0.2 was released on Aug 25: http://downloads.activestate.com/ActivePython/releases/2.7.0.2/ John, If it is ActivePython, the first line of the interactive shell (in credits section) should print something like: ActivePython 2.7.0.2 (ActiveState Software Inc.) Also what is the output of python -m activestate? -srid -- http://mail.python.org/mailman/listinfo/python-list
Re: strange results from sys.version
On 2010-09-27, at 4:01 PM, John Machin wrote: User (work): sys.version: 2.7 (r27:82500, Aug 23 2010, 17:18:21) etc Me : sys.version: 2.7 (r27:82525, Jul 4 2010, 09:01:59) etc [...] User result looks whacked: lower patch number, later date Perusing http://svn.python.org/view/python/branches/release27-maint/?view=log - the difference in svn versions (there is no difference in patch number) seems insignificant. Both revisions are past the 2.7 final release. Perhaps, the python.org installer was created using a later revision. -srid -- http://mail.python.org/mailman/listinfo/python-list
Re: (and scheme lisp) x Python and modern langs [was Re: gossip, Guy Steel, Lojban, Racket]
On 27 set, 18:39, Xah Lee xah...@gmail.com wrote: On Sep 27, 12:11 pm, namekuseijin namekusei...@gmail.com wrote: On 27 set, 16:06, Xah Lee xah...@gmail.com wrote: 2010-09-27 For instance, this is far more convenient: [x+1 for x in [1,2,3,4,5] if x%2==0] than this: map(lambda x:x+1,filter(lambda x:x%2==0,[1,2,3,4,5])) How about this: [snip] how about this: read before replying. hum??? i read your post quite carefully, and rather thought i replied well. I don't think so. You completely missed the point where I agreed about filter map being more convenient when calling predefined functions and also the detailed explanation of why do in scheme is not imperative at all. -- http://mail.python.org/mailman/listinfo/python-list
Re: Debugger - fails to continue with breakpoint set
Does this describe the problem you are having? http://bugs.python.org/issue5294 -- http://mail.python.org/mailman/listinfo/python-list
Re: Problems reading tif files
On Sep 26, 9:19 pm, Christian Heimes li...@cheimes.de wrote: Am 27.09.2010 02:31, schrieb gujax: Hi, I have read several related e-mails dating back as far as 2006. I am quite confused whether PIL can open tif images. Some posts seem to say there isn't yet any support for PIL while there are few posts where PIL has been able to open tif images. So I guess, I have to ask this probably trivial question again. I am just learning python and PIL. I have tiff images which are 8 bit and 16 bit gray scale images. I cannot open them. Here are the errors that I encounter. PIL only supports a limited subset of TIFF files. Several compression algorithms like G3 and G4 fax compression are not supported yet. PIL may have a problem with partly broken TIFF files, too. I have no idea why this happens. I will appreciate a resolution. The file opens with ImageJ and ImageMagick. It is a 8-bit RGB file. I have associated default viewer to be ImageMagick. I am on Lucid Linux, and other programs such as F- spot and Gimp cannot open those files either. I don't yet know how to attach image files to the post so please bear with me till I figure that out. Can you please post the output of tiffinfo for the specific file? It may give me a hint what's going wrong. There aren't a lot of good alternatives for image processing in Python. I've evaluated most of them and decided to write my own one for my employer. It's a Cython based library around FreeImage [1] and LCMS2 [2] and works very well. So far we have processed several million TIFF files with more than 100 TB of raw data smoothly. I've permission to release the software as open source but haven't found time to do a proper release. Christian Heimes [1]http://freeimage.sourceforge.net/ [2]http://www.littlecms.com/ Thanks Christian, Here is the tiffinfo: TIFF Directory at offset 0x8 (8) Subfile Type: (0 = 0x0) Image Width: 640 Image Length: 480 Bits/Sample: 32 Sample Format: IEEE floating point Compression Scheme: None Photometric Interpretation: min-is-black Samples/Pixel: 1 Rows/Strip: 480 Planar Configuration: single image plane ImageDescription: ImageJ=1.44f min=0.0 max=255.0 How do I use freeimage with python. Is there a backend? Can these files be converted to something else such as bmp and then read out? I should have tried it out before asking you, Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: Problems reading tif files
Thanks Christian, Here is the info: TIFF Directory at offset 0x8 (8) Subfile Type: (0 = 0x0) Image Width: 640 Image Length: 480 Bits/Sample: 32 Sample Format: IEEE floating point Compression Scheme: None Photometric Interpretation: min-is-black Samples/Pixel: 1 Rows/Strip: 480 Planar Configuration: single image plane ImageDescription: ImageJ=1.44f min=0.0 max=255.0 How can I use freeimage. Can I incorporate it with python? Any idea what do ImageJ or Matlab use. Don't they have a robust imaging toolbox. Unfortunately, I cannot afford Matlab and I am not good at Java programing to be able to implement ImageJ with numerical analysis software. Thanks much, gujax On Sep 26, 9:19 pm, Christian Heimes li...@cheimes.de wrote: Am 27.09.2010 02:31, schrieb gujax: Hi, I have read several related e-mails dating back as far as 2006. I am quite confused whether PIL can open tif images. Some posts seem to say there isn't yet any support for PIL while there are few posts where PIL has been able to open tif images. So I guess, I have to ask this probably trivial question again. I am just learning python and PIL. I have tiff images which are 8 bit and 16 bit gray scale images. I cannot open them. Here are the errors that I encounter. PIL only supports a limited subset of TIFF files. Several compression algorithms like G3 and G4 fax compression are not supported yet. PIL may have a problem with partly broken TIFF files, too. I have no idea why this happens. I will appreciate a resolution. The file opens with ImageJ and ImageMagick. It is a 8-bit RGB file. I have associated default viewer to be ImageMagick. I am on Lucid Linux, and other programs such as F- spot and Gimp cannot open those files either. I don't yet know how to attach image files to the post so please bear with me till I figure that out. Can you please post the output of tiffinfo for the specific file? It may give me a hint what's going wrong. There aren't a lot of good alternatives for image processing in Python. I've evaluated most of them and decided to write my own one for my employer. It's a Cython based library around FreeImage [1] and LCMS2 [2] and works very well. So far we have processed several million TIFF files with more than 100 TB of raw data smoothly. I've permission to release the software as open source but haven't found time to do a proper release. Christian Heimes [1]http://freeimage.sourceforge.net/ [2]http://www.littlecms.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Strong typing vs. strong testing
On 9/27/2010 10:46 AM, namekuseijin wrote: On 27 set, 05:46, TheFlyingDutchmanzzbba...@aol.com wrote: On Sep 27, 12:58 am, p...@informatimago.com (Pascal J. Bourguignon) wrote: RGrnospa...@flownet.com writes: In article 7df0eb06-9be1-4c9c-8057-e9fdb7f0b...@q16g2000prf.googlegroups.com, TheFlyingDutchmanzzbba...@aol.com wrote: On Sep 22, 10:26 pm, Scott L. Bursonsc...@ergy.com wrote: This might have been mentioned here before, but I just came across it: a 2003 essay by Bruce Eckel on how reliable systems can get built in dynamically-typed languages. It echoes things we've all said here, but I think it's interesting because it describes a conversion experience: Eckel started out in the strong-typing camp and was won over. https://docs.google.com/View?id=dcsvntt2_25wpjvbbhk The trouble with that essay is that he's comparing with C++. C++ stands alone as offering hiding without memory safety. No language did that before C++, and no language has done it since. The basic problem with C++ is that it take's C's rather lame concept of array=pointer and wallpapers over it with objects. This never quite works. Raw pointers keep seeping out. The mold always comes through the wallpaper. There have been better strongly typed languages. Modula III was quite good, but it was from DEC's RD operation, which was closed down when Compaq bought DEC. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Nautilus Python
On Mon, 27 Sep 2010 15:28:34 -0700, Eduardo Ribeiro wrote: But it doesn't work. What do you mean doesn't work? - It crashes the operating system; - You get a core dump; - You get an exception; - It hangs forever, never doing anything; - It does something unexpected; - Something else? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: reduced-tagged (was Re: toy list processing problem: collect similar terms)
On Mon, 27 Sep 2010 08:18:22 -0700, Mirko wrote: Here is my Common Lisp (and I only care about Common Lisp answers) Good for you. So why are you spamming other newsgroups with your CL solution? Not once, but three times. Replies to /dev/null. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: toy list processing problem: collect similar terms
On 2010-09-26, Xah Lee xah...@gmail.com wrote: On Sep 25, 11:17??pm, Paul Rubin no.em...@nospam.invalid wrote: Python solution follows (earlier one with an error cancelled). ??All crossposting removed since crossposting is a standard trolling tactic. btw, i disagree about your remark on crossposting. You're wrong. Crossposting is indeed a standard trolling tactic. This does not prove that all crossposters are trolls, nor does it assert that all crossposters are trolls, but it is absolutely factually correct that it's a standard trolling tactic. -s -- Copyright 2010, all wrongs reversed. Peter Seebach / usenet-nos...@seebs.net http://www.seebs.net/log/ -- lawsuits, religion, and funny pictures http://en.wikipedia.org/wiki/Fair_Game_(Scientology) -- get educated! I am not speaking for my employer, although they do rent some of my opinions. -- http://mail.python.org/mailman/listinfo/python-list
Re: toy list processing problem: collect similar terms
On 2010-09-26, J?rgen Exner jurge...@hotmail.com wrote: It was livibetter who without any motivation or reasoning posted Python code in CLPM. Not exactly; he posted it in a crossposted thread, which happened to include CLPM and other groups, including comp.lang.python. It is quite possible that he didn't know about the crossposting. However, while I would agree that this would constitute a form of ignorance, I'd think that, especially with how well some newsreading interfaces hide that detail, I don't think it's really worth getting angry over. -s -- Copyright 2010, all wrongs reversed. Peter Seebach / usenet-nos...@seebs.net http://www.seebs.net/log/ -- lawsuits, religion, and funny pictures http://en.wikipedia.org/wiki/Fair_Game_(Scientology) -- get educated! I am not speaking for my employer, although they do rent some of my opinions. -- http://mail.python.org/mailman/listinfo/python-list
How to Deal with Xah Lee Spam/Abuse (was: toy list processing problem: collect similar terms)
Seebs usenet-nos...@seebs.net writes: On 2010-09-26, Xah Lee xah...@gmail.com wrote: On Sep 25, 11:17??pm, Paul Rubin no.em...@nospam.invalid wrote: Python solution follows (earlier one with an error cancelled). ??All crossposting removed since crossposting is a standard trolling tactic. btw, i disagree about your remark on crossposting. You're wrong. FYI: Xah Lee is well known for his abuse of cross posting. Be happy that Google Groups limits the number of groups to crosspost to five. Related: his spamming behaviour has already resulted in Xah Lee having to look for another hosting provider [1]. Currently 1and1 provides him shelter, most likely carefully selected by Xah (as Google Groups) since 1and1 is not known for their spam fighting reputation nor clue. But one can only hope, so if you want to do something about this Xah thing, please report it with 1and1 and ab...@google.com. He won't learn respect from it, but maybe you end up being honored [2] on his collection of drivel [3]. In short: = don't reply to Xah Lee: at best it's a waste of time = if his post is abusive (crossposting to 5 groups just because you can is) report it with /and/ his hosting provider (since most of his posts are copy paste jobs of articles on his site just to drive traffic) and Google Groups (his Usenet provider of choice since they hardly do a thing about spam). [1] http://www.mail-archive.com/python-list@python.org/msg91631.html [2] http://www.google.com/search?q=site%3Axahlee.org%20bokma [3] What's sad is that some of its stuff is actually good/not bad. But tainted: Xah Lee is a spammer and a Usenet abuser. -- John Bokma j3b Blog: http://johnbokma.com/Facebook: http://www.facebook.com/j.j.j.bokma Freelance Perl Python Development: http://castleamber.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: toy list processing problem: collect similar terms
Seebs usenet-nos...@seebs.net writes: On 2010-09-26, J?rgen Exner jurge...@hotmail.com wrote: It was livibetter who without any motivation or reasoning posted Python code in CLPM. Not exactly; he posted it in a crossposted thread, which happened to include CLPM and other groups, including comp.lang.python. It is quite possible that he didn't know about the crossposting. Oh, he does. It has been Xah's game for years. while I would agree that this would constitute a form of ignorance, I'd think that, especially with how well some newsreading interfaces hide that detail, I don't think it's really worth getting angry over. You think wrong. And Jurgen should have known better than to reply several times (but like too many people in cplm he posts for posting's sake, the main reason why I don't follow that group anymore). Xah has been doing this for many years and most of his posts are just made to drive traffic to his site (hence they are copy paste of articles on his site + link(s) to his site). It's Usenet abuse, on purpose. The reason it pisses off people is that nearly weekly it causes a lot of noise in newsgroups that are really better off without the noise (IMNSHO). See my other post on how to deal with this spammer. If you've missed it: report him for spamming, since that's what he does. It already made him have to move hosting providers once. While it's not going to stop him, it will cost him money. See: http://www.google.com/search?q=site%3Axahlee.org%20bokma While I am named in that article be assured that I was not the only one contacting dreamhost (+10 for doing this, btw). Quite some people contacted me via email that they also talked with Dreamhost. Just keep reporting this spammer, and maybe 1and1 will kick it out. -- John Bokma j3b Blog: http://johnbokma.com/Facebook: http://www.facebook.com/j.j.j.bokma Freelance Perl Python Development: http://castleamber.com/ -- http://mail.python.org/mailman/listinfo/python-list
Example of exec_proxy
Hi Team, I am very new to this python world. Below is my problem. I have a Machine A where i want to execute some commands(dos commands from command prompt), delete/create some files, delete/create some directories. All this i need to do from my local host. Is there a way which i can do? Can ayone help me in achieving this? I tried using WMI module, but it only starts the processes. It is not allowing me to execute commands/ work with files and directories. I got to see this EXEC_PROXY module but i find no examples of it which is used to connect to remote machine. Could any of you provide that? -- Thank You, Prathibha -- http://mail.python.org/mailman/listinfo/python-list
Re: Nautilus Python
On Sep 28, 12:31 pm, Steven D'Aprano steve-REMOVE- t...@cybersource.com.au wrote: On Mon, 27 Sep 2010 15:28:34 -0700, Eduardo Ribeiro wrote: But it doesn't work. What do you mean doesn't work? - It crashes the operating system; - You get a core dump; - You get an exception; - It hangs forever, never doing anything; - It does something unexpected; - Something else? -- Steven It seems to be a fairly absolute statement - so I would assume all of the above! :-) -- http://mail.python.org/mailman/listinfo/python-list
Re: toy list processing problem: collect similar terms
On 2010-09-28, John Bokma j...@castleamber.com wrote: Seebs usenet-nos...@seebs.net writes: On 2010-09-26, J?rgen Exner jurge...@hotmail.com wrote: It was livibetter who without any motivation or reasoning posted Python code in CLPM. Not exactly; he posted it in a crossposted thread, which happened to include CLPM and other groups, including comp.lang.python. It is quite possible that he didn't know about the crossposting. Oh, he does. It has been Xah's game for years. But did livibetter know about it? I wasn't defending Xah, who is indeed at the very least clueless and disruptive. But I was sort of defending the poster who was accused of posting Python code in CLPM, because that poster may not have understood the game. -s -- Copyright 2010, all wrongs reversed. Peter Seebach / usenet-nos...@seebs.net http://www.seebs.net/log/ -- lawsuits, religion, and funny pictures http://en.wikipedia.org/wiki/Fair_Game_(Scientology) -- get educated! I am not speaking for my employer, although they do rent some of my opinions. -- http://mail.python.org/mailman/listinfo/python-list
Re: toy list processing problem: collect similar terms
Seebs usenet-nos...@seebs.net writes: fup set to poster On 2010-09-28, John Bokma j...@castleamber.com wrote: Seebs usenet-nos...@seebs.net writes: On 2010-09-26, J?rgen Exner jurge...@hotmail.com wrote: It was livibetter who without any motivation or reasoning posted Python code in CLPM. Not exactly; he posted it in a crossposted thread, which happened to include CLPM and other groups, including comp.lang.python. It is quite possible that he didn't know about the crossposting. Oh, he does. It has been Xah's game for years. But did livibetter know about it? I wasn't defending Xah, who is indeed at the very least clueless and disruptive. Heh, he's not clueless, the problem is that he knows exactly what he's doing. And like most spammers, very hard to get rid off. But I was sort of defending the poster who was accused of posting Python code in CLPM, because that poster may not have understood the game. Ah, clear. Well, the problem is somewhat also in CLPM where people somehow have to reply to messages like this :-(. And I am sure Xah laughes his ass off each time it happens. -- John Bokma j3b Blog: http://johnbokma.com/Facebook: http://www.facebook.com/j.j.j.bokma Freelance Perl Python Development: http://castleamber.com/ -- http://mail.python.org/mailman/listinfo/python-list
[issue9937] _winreg.EnumValue causes MemoryError
Changes by Hirokazu Yamamoto ocean-c...@m2.ccsnet.ne.jp: Removed file: http://bugs.python.org/file18999/py27_winreg_EnumValue.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9937 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9937] _winreg.EnumValue causes MemoryError
Changes by Hirokazu Yamamoto ocean-c...@m2.ccsnet.ne.jp: Removed file: http://bugs.python.org/file19021/py27_fix_winreg_EnumValue_op1.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9937 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9937] _winreg.EnumValue causes MemoryError
Hirokazu Yamamoto ocean-c...@m2.ccsnet.ne.jp added the comment: I've withdrew my patch... It has still problem, and I cannot fix it yet. I suppose option 2 is easy. ANSI API's limitation makes it harder to implement correctly. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9937 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9937] _winreg.EnumValue causes MemoryError
STINNER Victor victor.stin...@haypocalc.com added the comment: Can't we use RegEnumValueW and RegQueryInfoKeyW? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9937 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9958] (c)elementTree missing children
New submission from Valentin Kuznetsov vkuz...@gmail.com: Hi, I found that parsing XML file with identical structure leads to missing children item at some point. In my test case which I attach it happens at id=183. Basically I have XML with bunch of elements of the following structure: processed_dataset id='0' path dataset_path='/aaa/0'/ /processed_dataset processed_dataset id='1' path dataset_path='/aaa/0'/ /processed_dataset when I parse them recursively, all, except the one with id=183, are parsed identically. The one with id=183 does not contain children. I tried the code with python 2.6 and python 2.7 on Mac and Linux. Bug exists in both version of ElementTree and cElementTree. Code and testbed XML are attached. Please untar and run as python test_bug.py. Thanks, Valentin -- files: em_bug.tar messages: 117440 nosy: vkuznet priority: normal severity: normal status: open title: (c)elementTree missing children type: behavior versions: Python 2.6, Python 2.7 Added file: http://bugs.python.org/file19028/em_bug.tar ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9958 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9958] (c)elementTree missing children
Amaury Forgeot d'Arc amaur...@gmail.com added the comment: The given script yields an item on a start event; but the element may not be fully populated at this point. please read http://docs.python.org/library/xml.etree.elementtree.html#xml.etree.ElementTree.iterparse You should use the end events instead. -- nosy: +amaury.forgeotdarc resolution: - invalid status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9958 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2972] arguments and default path not set in site.py and sitecustomize.py
Geoffrey Bache gjb1...@users.sourceforge.net added the comment: I also just ran into this. Is it likely that an enhancement request to provide access to the raw command line, as requested by the previous commenter, would be accepted? It's sometimes useful to have some idea about what kind of Python process is being started at this point. -- nosy: +gjb1002 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2972 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2972] arguments and default path not set in site.py and sitecustomize.py
Tim Golden m...@timgolden.me.uk added the comment: Merely from a Windows point-of-view, you could get the full command line fairly easily: code import ctypes pstring = ctypes.windll.kernel32.GetCommandLineW () print (ctypes.c_wchar_p (pstring).value) /code TJG -- nosy: +tim.golden ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2972 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9959] int(math.log(4,2)) == 1 instead of 2
New submission from akira 4kir4...@gmail.com: $ python3.1 -c'import math; f = math.log(4,2); print(int(f), f.as_integer_ratio())' 2 (2, 1) $ python3.2 -c'import math; f = math.log(4,2); print(int(f), f.as_integer_ratio())' 1 (9007199254740991, 4503599627370496) Python 3.2a2+ (py3k:85028, Sep 27 2010, 16:46:11) [GCC 4.4.3] on linux2 Type help, copyright, credits or license for more information. import math f = math.log(32, 2) f 4.999 int(f) 4 f.as_integer_ratio() (5629499534213119, 1125899906842624) I'm not sure whether it is a bug, but it is an unexpected change in behavior between 3.1 and 3.2. -- components: Library (Lib) messages: 117444 nosy: akira priority: normal severity: normal status: open title: int(math.log(4,2)) == 1 instead of 2 type: behavior versions: Python 3.2 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9959 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2972] arguments and default path not set in site.py and sitecustomize.py
Geoffrey Bache gjb1...@users.sourceforge.net added the comment: Interesting. Any idea if something similar is possible on Linux? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2972 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9955] multiprocessing.Pipe segmentation fault when recv of unpicklable object
Changes by Brian Curtin cur...@acm.org: -- nosy: +asksol ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9955 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2972] arguments and default path not set in site.py and sitecustomize.py
Tim Golden m...@timgolden.me.uk added the comment: I'm afraid I don't know; might be worth asking that on the main python mailing list. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2972 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9959] int(math.log(4,2)) == 1 instead of 2
Mark Dickinson dicki...@gmail.com added the comment: No, it's not really a bug: math.log(x, 2) isn't an atomic operation: it's computed internally as something like log(x) / log(2), and since each of the three steps (computation of the logs, division) can introduce a small rounding error, you shouldn't be surprised if the result doesn't come out exactly. The difference between 3.1 and 3.2 was a side-effect of a change to remove the dependence of the math module on the internal long integer representation. Having said that, it would be possible to improve the algorithm that's used to compute log of an integer (see the loghelper function in Modules/mathmodule.c): currently, for positive k, log(2**k) ends up being computed as log(0.5) + (k+1)*log(2), which doesn't help; it would be slightly better if it were computed directly as k*log(2) instead. But you still can't (and shouldn't) rely on log(x, 2) giving exact results for powers of 2. I'm not sure what you're using math.log(x, 2) for, but you may be interested in the int.bit_length method. -- assignee: - mark.dickinson nosy: +mark.dickinson ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9959 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9960] test_structmembers fails on s390x (bigendian 64-bit): int/Py_ssize_t issue
New submission from Dave Malcolm dmalc...@redhat.com: test test_structmembers crashed -- type 'exceptions.ValueError': string too long Traceback (most recent call last): File /builddir/build/BUILD/Python-2.7/Lib/test/regrtest.py, line 863, in runtest_inner the_package = __import__(abstest, globals(), locals(), []) File /builddir/build/BUILD/Python-2.7/Lib/test/test_structmembers.py, line 12, in module 9.9, 10.1010101010, hi) ValueError: string too long _testcapimodule.c: test_structmembers_new's fmt has: s# and these args: s, string_len for grabbing this data: const char *s = NULL; Py_ssize_t string_len = 0; However, the module doesn't define PY_SSIZE_T_CLEAN, which leads to string_len being treated as an (int*) rather than a (Py_ssize_t*) and thus written to with just the first 32-bits of the size, rather than the full size. The PyArgs_ call without PY_SSIZE_T_CLEAN writes the size of the string (2) through (int*)string_len, writing 0x0002 to the first 4 bytes, setting the 64-bit string_len value to 0x0002 i.e. 2^34, wildly too large for the iirc 5 byte buffer. Confirmed in gdb: (gdb) p string_len $2 = 8589934592 (gdb) p /x string_len $3 = 0x2 Am attaching a patch (against 2.7 maintenance branch) which defines PY_SSIZE_T_CLEAN; doing so requires updating another int to be a Py_ssize_t in that module, within test_u_code. http://docs.python.org/c-api/arg.html lists u# (Unicode) [Py_UNICODE *, int] and has no reference to the effect of PY_SSIZE_T_CLEAN on the u# format specifier. My reading of Python/getargs.c is that this macro does affect u# in a manner analogous to s#; does this documentation need clarifying? -- components: Tests files: python-test_structmembers.patch keywords: easy, patch messages: 117448 nosy: dmalcolm priority: normal severity: normal stage: patch review status: open title: test_structmembers fails on s390x (bigendian 64-bit): int/Py_ssize_t issue type: behavior versions: Python 2.7 Added file: http://bugs.python.org/file19029/python-test_structmembers.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9960 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9960] test_structmembers fails on s390x (bigendian 64-bit): int/Py_ssize_t issue
Changes by Mark Dickinson dicki...@gmail.com: -- nosy: +mark.dickinson ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9960 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9961] Identity Crisis! variable assignment using strftime fails comparison test.
New submission from Bill Hawkes williamhawke...@yahoo.com:
See below. When variable assignment is used with strftime for the day of the
week, it fails comparison checks for the days of the week. Even when using the
str() function it still fails. Manual entry of variable assignment is required
for a successful comparison. This pretty well defeats the purpose of computer
programming (automation). There seems to be a real identity crisis here!
$ python3
Python 3.0rc1+ (py3k, Oct 28 2008, 09:23:29)
[GCC 4.3.2] on linux2
import time
from datetime import date
today = date.today()
print(This line will always print)
This line will always print
myday = today.fromordinal(today.toordinal() - 31)
printthis = myday.strftime(%m-%d-%y. %d %b %Y is a %A on the %d day of
%B.)
print(%s % printthis)
08-27-10. 27 Aug 2010 is a Friday on the 27 day of August.
# dow is Day Of Week variable
... dow = myday.strftime(%A)
chkval = dow
dow is chkval
True
print(dow is %s % dow)
dow is Friday
print(chkval is %s % chkval)
chkval is Friday
print(%s % dow)
Friday
print(%s % chkval)
Friday
dow is chkval
True
if dow is 'Sunday':
...cntbck = 0
... elif dow is 'Monday':
...cntbck = 1
... elif dow is 'Tuesday':
...cntbck = 2
... elif dow is 'Wednesday':
...cntbck = 3
... elif dow is 'Thursday':
...cntbck = 4
... elif dow is 'Friday':
...cntbck = 5
... elif dow is 'Saturday':
...cntbck = 6
... else:
...cntbck = 'undefined'
...print(What day is it? It is %s % dow)
...
What day is it? It is Friday
print('finished with script')
finished with script
dow is 'Friday'
False
dow = 'Friday'
dow is 'Friday'
True
chkval
'Friday'
dow
'Friday'
chkval is dow
False
chkval is 'Friday'
False
chkval
'Friday'
chkval = str(chkval)
chkval
'Friday'
chkval is 'Friday'
False
cntbck
'undefined'
--
components: Interpreter Core
messages: 117449
nosy: BillHawkes
priority: normal
severity: normal
status: open
title: Identity Crisis! variable assignment using strftime fails comparison
test.
type: behavior
versions: Python 3.1
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[issue9961] Identity Crisis! variable assignment using strftime fails comparison test.
Jean-Paul Calderone inva...@example.invalid added the comment: You mistakenly used is for these comparisons, rather than ==. The strftime involvement is a red herring. The real problem is the use of an /identity/ comparison rather than an /equality/ comparison. -- nosy: +exarkun resolution: - invalid status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9961 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1615376] subprocess doesn\'t handle SIGPIPE
Changes by Barry A. Warsaw ba...@python.org: -- nosy: +barry ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1615376 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1652] subprocess should have an option to restore SIGPIPE to default action
Changes by Barry A. Warsaw ba...@python.org: -- nosy: +barry ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1652 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9609] make cProfile multi-stack aware
Changes by Todd Whiteman twhit...@yahoo.com.au: -- nosy: +twhitema ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9609 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9941] Unify trace and profile interfaces
Alexander Belopolsky belopol...@users.sourceforge.net added the comment: I've ran into a problem adding context manager functionality to Profile/Trace objects. When profile/trace function is set in __enter__ and removed in __exit__ it catches two spurious events: a return from __enter__ and a call to __exit__. This is particularly problematic with Profile which is not prepared to handle a return event that does not follow a matching call. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9941 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1634774] locale 1251 does not convert to upper case properly
Amaury Forgeot d'Arc amaur...@gmail.com added the comment: the OP is right: str.upper is supposed to be locale-dependent http://docs.python.org/library/stdtypes.html#str.upper But the implementation uses _toupper() which is a macro with Visual Studio, and obviously not locale-dependent: #define _toupper(_Char)( (_Char)-'a'+'A' ) -- nosy: +amaury.forgeotdarc stage: unit test needed - needs patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1634774 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9950] socket.sendall() crash when receiving a signal
Antoine Pitrou pit...@free.fr added the comment: Patch committed in r85032. I'm gonna watch the buildbots a bit, in case the test fails on some platforms. -- assignee: - pitrou resolution: - fixed stage: - committed/rejected ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9950 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8521] Allow some winreg functions to accept named arguments
Brian Curtin cur...@acm.org added the comment: Committed in r85033. -- resolution: - fixed stage: patch review - committed/rejected status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue8521 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8158] documentation of 'optparse' module incomplete
Sandro Tosi sandro.t...@gmail.com added the comment: Hello, since 2.7 optparse is deprecated in favor of argparse: is this bug still worth to be fixed? If so, I can work on a patch for the doc. Regards, Sandro -- nosy: +sandro.tosi ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue8158 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8158] documentation of 'optparse' module incomplete
Sandro Tosi sandro.t...@gmail.com added the comment: Sorry, I probably overlooked at the situation. After a quick chat with Antoine on IRC, it's clear optparse is here to stay for all the lifetime of 2.7 (quite a long and prosper, we hope :) so yes, it's worth work on its documentation, hence I'll start preparing a patch and I'll submit it asap. Cheers, Sandro -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue8158 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9959] int(math.log(4,2)) == 1 instead of 2
akira 4kir4...@gmail.com added the comment: No, it's not really a bug: math.log(x, 2) isn't an atomic operation: It is not a bug, but values of math.log(4) differs between 3.1 and 3.2 i.e., math.log(4.0) in 3.2 returns value that is consistent with math.log(4) in 3.1 but math.log(4) in 3.2 doesn't. I'm not sure what you're using math.log(x, 2) for, but you may be interested in the int.bit_length method. The docs for int.bit_length say: if x is nonzero, then x.bit_length() is the unique positive integer k such that 2**(k-1) = abs(x) 2**k. Equivalently, when abs(x) is small enough to have a correctly rounded logarithm, then k = 1 + int(log(abs(x), 2)). It is expected that int(log(n,2)) produces correct result for small n. Having said that, it would be possible to improve the algorithm that's used to compute log of an integer (see the loghelper function in Modules/mathmodule.c): currently, for positive k, log(2**k) ends up being computed as log(0.5) + (k+1)*log(2), which doesn't help; it would be slightly better if it were computed directly as k*log(2) instead. But you still can't (and shouldn't) rely on log(x, 2) giving exact results for powers of 2. I've changed loghelper() to return improved result for power of 2 -- keywords: +patch Added file: http://bugs.python.org/file19030/math_log_power_two.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9959 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9441] increase logging handlers test coverage
Brian Curtin cur...@acm.org added the comment: It would be nice to see tests for NTEventLogHandler, as there are currently none. I looked into implementing NTEventLogHandler's Win32 calls in a C extension rather than requiring a third-party module, but stopped once I realized there weren't any tests. I may get to it myself, but I thought I'd throw this out there. -- nosy: +brian.curtin ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9441 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9959] int(math.log(4,2)) == 1 instead of 2
Changes by akira 4kir4...@gmail.com: Added file: http://bugs.python.org/file19031/test_log_power_two.py ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9959 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9950] socket.sendall() crash when receiving a signal
Antoine Pitrou pit...@free.fr added the comment: The patch passes at least on Linux, OS X and Solaris buildbots. Backported to 3.1 (r85034) and 2.7 (r85035). -- status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9950 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9959] int(math.log(4,2)) == 1 instead of 2
Changes by akira 4kir4...@gmail.com: -- type: behavior - feature request ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9959 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9929] subprocess.Popen unbuffered not work
R. David Murray rdmur...@bitdance.com added the comment: But if line buffering doesn't work, disabling buffering on stdout/stderr does have a functional consequence: it allows process output to appear as generated instead of coming in chunks when the buffer is full. Of course, I could be completely misunderstanding what you are talking about :) -- nosy: +r.david.murray ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9929 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9929] subprocess.Popen unbuffered not work
Antoine Pitrou pit...@free.fr added the comment: But if line buffering doesn't work, disabling buffering on stdout/stderr does have a functional consequence: it allows process output to appear as generated instead of coming in chunks when the buffer is full Yes, sorry, I had it backwards. It's buffering on stdin which doesn't make any functional difference (whether it's buffered or not, you always get data as soon as it arrives). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9929 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8959] WINFUNCTYPE wrapped ctypes callbacks not functioning correctly in Python 2.7
Brian Curtin cur...@acm.org added the comment: This doesn't seem to be an issue anymore. -- stage: - committed/rejected status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue8959 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9934] Python Docs Typo
Éric Araujo mer...@netwok.org added the comment: Ported to distutils2 in 2f460982b025, thanks! -- components: +Distutils2 nosy: +eric.araujo ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9934 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9943] TypeError message became less helpful in Python 2.7
Changes by Éric Araujo mer...@netwok.org: -- nosy: +eric.araujo ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9943 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9945] Improper locking in logging
Éric Araujo mer...@netwok.org added the comment: Just to be sure: this does not apply to 3.1? -- nosy: +eric.araujo ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9945 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9946] lock use in logging
Changes by Éric Araujo mer...@netwok.org: -- superseder: - Improper locking in logging ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9946 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3532] bytes.tohex method
Éric Araujo mer...@netwok.org added the comment: See #9951 for a patch adding bytes.hex -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue3532 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
