Call for papers: SETP-10, USA, July 2010
It would be highly appreciated if you could share this announcement with your colleagues, students and individuals whose research is in software engineering, software testing, software quality assurance, software design and related areas. Call for papers: SETP-10, USA, July 2010 The 2010 International Conference on Software Engineering Theory and Practice (SETP-10) (website: http://www.PromoteResearch.org ) will be held during 12-14 of July 2010 in Orlando, FL, USA. SETP is an important event in the areas of Software development, maintenance, and other areas of software engineering and related topics. The conference will be held at the same time and location where several other major international conferences will be taking place. The conference will be held as part of 2010 multi-conference (MULTICONF-10). MULTICONF-10 will be held during July 12-14, 2010 in Orlando, Florida, USA. The primary goal of MULTICONF is to promote research and developmental activities in computer science, information technology, control engineering, and related fields. Another goal is to promote the dissemination of research to a multidisciplinary audience and to facilitate communication among researchers, developers, practitioners in different fields. The following conferences are planned to be organized as part of MULTICONF-10. • International Conference on Artificial Intelligence and Pattern Recognition (AIPR-10) •International Conference on Automation, Robotics and Control Systems (ARCS-10) • International Conference on Bioinformatics, Computational Biology, Genomics and Chemoinformatics (BCBGC-10) • International Conference on Computer Communications and Networks (CCN-10) • International Conference on Enterprise Information Systems and Web Technologies (EISWT-10) • International Conference on High Performance Computing Systems (HPCS-10) • International Conference on Information Security and Privacy (ISP-10) • International Conference on Image and Video Processing and Computer Vision (IVPCV-10) • International Conference on Software Engineering Theory and Practice (SETP-10) • International Conference on Theoretical and Mathematical Foundations of Computer Science (TMFCS-10) MULTICONF-10 will be held at Imperial Swan Hotel and Suites. It is a full-service resort that puts you in the middle of the fun! Located 1/2 block south of the famed International Drive, the hotel is just minutes from great entertainment like Walt Disney World® Resort, Universal Studios and Sea World Orlando. Guests can enjoy free scheduled transportation to these theme parks, as well as spacious accommodations, outdoor pools and on-site dining — all situated on 10 tropically landscaped acres. Here, guests can experience a full- service resort with discount hotel pricing in Orlando. We invite draft paper submissions. Please see the website http://www.PromoteResearch.org for more details. Sincerely James Heralds -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations/
Re: getting attributes and methods of class without creating object
On May 18, 11:50 am, Patrick Maupin pmau...@gmail.com wrote: On May 17, 10:52 pm, shuvro shuvr...@gmail.com wrote: Suppose I have a class like this - class myClass(object): def __init__(self): self.a = 10 self.b = 20 def my_method(self,var = 20): self.local_var = var I want to know about its method(__init__ and my_method) and variables(a,b, local_var) without creating the object of it. I tried getmembers function of inspect module. But it can do this with an object of myClass as argument. Like import inspect var = myClass() inspect.getmembers(var) I have to know about this without creating the object of myClass. Can anyone help me please? Well, you can do the same thing with myClass itself: inspect.getmembers(myClass) But that won't show you a,b, or local_var, because those don't belong to the class. They only belong to class instances, and maybe even not all class instances. (For example, if my_method is not called, then the instance won't have local_var defined.) Python is a very dynamic language, and class instances (and even the classes themselves!) can be modified at any time during execution. You don't even have to be executing inside a class's function to add stuff to it: class foo: pass bar = foo() bar.a = 3 So to know about the attributes of an instance of a class without actually creating that instance is very difficult. You didn't specify why you want to do this, but often the reason is to try to catch potential errors without actually running code. This is typically called linting, and there are a few Python packages designed to do this, such as pylint and pychecker. Probably others, but I don't know anything about them, because I find that in most cases, the best way to test or to reason about Python code is to actually run it. Regards, Pat Thanks Pat for your informative reply. Actually what I am trying to do is to write an external exporter for the data types an open source software(Blender). So, I have to collect the properties of the classes. Here, I have no chance to edit the class and add inspect codes there, neither I can create objects of the existing classes (that will do some additional things which I not want). Is it not possible with the existing python facilities (without adding external libraries) ? Shuvro -- http://mail.python.org/mailman/listinfo/python-list
Re: url fetching from xml depending upon selection
shanti bhushan, 18.05.2010 07:18:
I have a sample.XML file
the code is like this
?xml version=1.0 encoding=UTF-8?
opml version=1.0
head
titleMy Podcasts/title
dateCreatedSun, 07 Mar 2010 15:53:26
GMT/dateCreated
dateModifiedSun, 07 Mar 2010 15:53:26
GMT/dateModified
/head
body
TestCase name=Sprint_001
Input url=http://first.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
TestCase name=Sprint_002
Input url=http://second.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
TestCase name=Sprint_003
Input url=http://third.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
/body
/opml
This my python code
from xml.etree import ElementTree
with open('our.xml', 'rt') as f:
tree = ElementTree.parse(f)
for node, value in tree.findall('.//TestCase/Input'):
url=node.attrib.get('url')
print url
i want to print the url depending on name=sprint_001.
for test_case in tree.findall('.//TestCase'):
if test_case.get('name') == 'sprint_002':
for input_el in test_case:
print input_el.get('url')
Stefan
--
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Re: pickle unable to load collection
paragk wrote:
Hi,
I am unable to figure out the cause of python pickle unable to find
the collection module.
I am getting
__import__(module)
ImportError: No module named collections
when I try to load a pickled object.
Details:
Python version:
Python 2.6 (r26:66721, Oct 2 2008, 11:35:03) [MSC v.1500 32 bit
(Intel)] on win32
[CODE]
import sys
import glob
import collections
import pickle
...
SomeListDict = collections.defaultdict(list)
... # Populate SomeListDict
DictFile = open (options.saveDict, 'w')
pickle.dump(SomeListDict , DictFile, -1)
DictFile.close()
[...]
From the above analysis, clearly the collection module exists, since
the dump works.
What am I missing?
You have to open the file in binary mode wb.
import collections
import pickle
data = pickle.dumps(collections.defaultdict())
pickle.loads(data)
defaultdict(None, {})
Now simulate the effect of writing in text mode and reading in binary mode:
garbled_data = data.replace(\n, \r\n)
pickle.loads(garbled_data)
Traceback (most recent call last):
File stdin, line 1, in module
File /usr/lib/python2.6/pickle.py, line 1374, in loads
return Unpickler(file).load()
File /usr/lib/python2.6/pickle.py, line 858, in load
dispatch[key](self)
File /usr/lib/python2.6/pickle.py, line 1090, in load_global
klass = self.find_class(module, name)
File /usr/lib/python2.6/pickle.py, line 1124, in find_class
__import__(module)
ImportError: No module named collections
try: pickle.loads(garbled_data)
... except ImportError as e:
... e
...
ImportError('No module named collections\r',)
So as Steven suspected there was a whitespace char in the module name:
pickle.load() was looking for the collections\r module.
Peter
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Re: Pyserial and pysqlite data types, need advice
The best thing I've found is this: http://eli.thegreenplace.net/2009/05/29/storing-blobs-in-a-sqlite-db-with-pythonpysqlite/ On Mon, May 17, 2010 at 5:05 PM, jon vs. python jonvspyt...@gmail.comwrote: Hi, I'm trying to store frames received via serial port (using Pyserial) into a sqlite database (using Pysqlite) in order to perform off-line processing. Thus I could use both SQL's power and Python's magic to make everything easier. I'd like my code to be generic and work both for binary and ascii protocols, too. Which kind of data should I use to store the frames? Should I store every byte as a char in VARCHAR? (This seems to fail when trying to store non printable characters). Should I encapsulate frames in buffer objects and store them in BLOBs? (This seems to work but hides content and thus doesn't allow to use database operations directly on the data) I've also tried, unsuccessfully, to use bytearrays with pysqlite... Any suggestion? Thanks, Jon. -- http://mail.python.org/mailman/listinfo/python-list
Re: url fetching from xml depending upon selection
On May 18, 10:18 am, shanti bhushan ershantibhus...@gmail.com wrote:
I have a sample.XML file
the code is like this
?xml version=1.0 encoding=UTF-8?
opml version=1.0
head
titleMy Podcasts/title
dateCreatedSun, 07 Mar 2010 15:53:26
GMT/dateCreated
dateModifiedSun, 07 Mar 2010 15:53:26
GMT/dateModified
/head
body
TestCase name=Sprint_001
Input url=http://first.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
TestCase name=Sprint_002
Input url=http://second.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
TestCase name=Sprint_003
Input url=http://third.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
/body
/opml
This my python code
from xml.etree import ElementTree
with open('our.xml', 'rt') as f:
tree = ElementTree.parse(f)
for node, value in tree.findall('.//TestCase/Input'):
url=node.attrib.get('url')
print url
i want to print the url depending on name=sprint_001.
If i change my option to sprint_002 it should print url for sprint_002
i have tried some new things here
from xml.etree import ElementTree
with open('our.xml', 'rt') as f:
tree = ElementTree.parse(f)
for node in tree.findall('.//TestCase/'):
print node.attrib.keys()
print node.attrib.items()
print node.attrib.get(1)
url=node.attrib.get('url')
print url
but i am not getting idea ... how to achive my motive
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Re: url fetching from xml depending upon selection
On May 18, 12:04 pm, Stefan Behnel stefan...@behnel.de wrote:
shanti bhushan, 18.05.2010 07:18:
I have a sample.XML file
the code is like this
?xml version=1.0 encoding=UTF-8?
opml version=1.0
head
titleMy Podcasts/title
dateCreatedSun, 07 Mar 2010 15:53:26
GMT/dateCreated
dateModifiedSun, 07 Mar 2010 15:53:26
GMT/dateModified
/head
body
TestCase name=Sprint_001
Input url=http://first.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
TestCase name=Sprint_002
Input url=http://second.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
TestCase name=Sprint_003
Input url=http://third.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
/body
/opml
This my python code
from xml.etree import ElementTree
with open('our.xml', 'rt') as f:
tree = ElementTree.parse(f)
for node, value in tree.findall('.//TestCase/Input'):
url=node.attrib.get('url')
print url
i want to print the url depending on name=sprint_001.
for test_case in tree.findall('.//TestCase'):
if test_case.get('name') == 'sprint_002':
for input_el in test_case:
print input_el.get('url')
Stefan- Hide quoted text -
- Show quoted text -
Hi Stevan
i tried your logic i am not getting any out put for this
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Re: url fetching from xml depending upon selection
shanti bhushan, 18.05.2010 07:18:
I have a sample.XML file
the code is like this
?xml version=1.0 encoding=UTF-8?
opml version=1.0
head
titleMy Podcasts/title
dateCreatedSun, 07 Mar 2010 15:53:26
GMT/dateCreated
dateModifiedSun, 07 Mar 2010 15:53:26
GMT/dateModified
/head
body
TestCase name=Sprint_001
Input url=http://first.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
TestCase name=Sprint_002
Input url=http://second.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
TestCase name=Sprint_003
Input url=http://third.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
/body
/opml
This my python code
from xml.etree import ElementTree
with open('our.xml', 'rt') as f:
tree = ElementTree.parse(f)
for node, value in tree.findall('.//TestCase/Input'):
url=node.attrib.get('url')
print url
i want to print the url depending on name=sprint_001.
If i change my option to sprint_002 it should print url for sprint_002
Actually, try this:
test_cases = dict(
(test_case.get('name'), [ el.get('url') for el in test_case ])
for test_case in tree.findall('.//TestCase') )
print test_cases['Sprint_001'] # - prints list of URLs
That gives you a dict of test case names that are mapped to the list of
their URLs.
Stefan
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Re: url fetching from xml depending upon selection
On May 18, 12:04 pm, Stefan Behnel stefan...@behnel.de wrote:
shanti bhushan, 18.05.2010 07:18:
I have a sample.XML file
the code is like this
?xml version=1.0 encoding=UTF-8?
opml version=1.0
head
titleMy Podcasts/title
dateCreatedSun, 07 Mar 2010 15:53:26
GMT/dateCreated
dateModifiedSun, 07 Mar 2010 15:53:26
GMT/dateModified
/head
body
TestCase name=Sprint_001
Input url=http://first.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
TestCase name=Sprint_002
Input url=http://second.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
TestCase name=Sprint_003
Input url=http://third.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
/body
/opml
This my python code
from xml.etree import ElementTree
with open('our.xml', 'rt') as f:
tree = ElementTree.parse(f)
for node, value in tree.findall('.//TestCase/Input'):
url=node.attrib.get('url')
print url
i want to print the url depending on name=sprint_001.
for test_case in tree.findall('.//TestCase'):
if test_case.get('name') == 'sprint_002':
for input_el in test_case:
print input_el.get('url')
Stefan- Hide quoted text -
- Show quoted text -
Great Help Stefan -
my regards to you
thankyou once again it waorks fine ...
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Re: url fetching from xml depending upon selection
shanti bhushan, 18.05.2010 10:08:
On May 18, 12:04 pm, Stefan Behnelstefan...@behnel.de wrote:
shanti bhushan, 18.05.2010 07:18:
[...]
body
TestCase name=Sprint_001
Input url=http://first.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
TestCase name=Sprint_002
Input url=http://second.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
TestCase name=Sprint_003
Input url=http://third.co.jp; /
Input url=http://www.google.com; /
Input url=http://www.epaper.times.india.com; /
/TestCase
/body
/opml
This my python code
from xml.etree import ElementTree
with open('our.xml', 'rt') as f:
tree = ElementTree.parse(f)
for node, value in tree.findall('.//TestCase/Input'):
url=node.attrib.get('url')
print url
i want to print the url depending on name=sprint_001.
for test_case in tree.findall('.//TestCase'):
if test_case.get('name') == 'sprint_002':
for input_el in test_case:
print input_el.get('url')
i tried your logic i am not getting any out put for this
Obviously, because the correct name value is 'Sprint_002', not
'sprint_002'. Please ask back if you need help in understanding the code I
posted.
Stefan
--
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Re: pickle unable to load collection
On May 18, 12:10 am, Peter Otten __pete...@web.de wrote:
paragk wrote:
Hi,
I am unable to figure out the cause of python pickle unable to find
the collection module.
I am getting
__import__(module)
ImportError: No module named collections
when I try to load a pickled object.
Details:
Python version:
Python 2.6 (r26:66721, Oct 2 2008, 11:35:03) [MSC v.1500 32 bit
(Intel)] on win32
[CODE]
import sys
import glob
import collections
import pickle
...
SomeListDict = collections.defaultdict(list)
... # Populate SomeListDict
DictFile = open (options.saveDict, 'w')
pickle.dump(SomeListDict , DictFile, -1)
DictFile.close()
[...]
From the above analysis, clearly the collection module exists, since
the dump works.
What am I missing?
You have to open the file in binary mode wb.
import collections
import pickle
data = pickle.dumps(collections.defaultdict())
pickle.loads(data)
defaultdict(None, {})
Now simulate the effect of writing in text mode and reading in binary mode:
garbled_data = data.replace(\n, \r\n)
pickle.loads(garbled_data)
Traceback (most recent call last):
File stdin, line 1, in module
File /usr/lib/python2.6/pickle.py, line 1374, in loads
return Unpickler(file).load()
File /usr/lib/python2.6/pickle.py, line 858, in load
dispatch[key](self)
File /usr/lib/python2.6/pickle.py, line 1090, in load_global
klass = self.find_class(module, name)
File /usr/lib/python2.6/pickle.py, line 1124, in find_class
__import__(module)
ImportError: No module named collections
try: pickle.loads(garbled_data)
... except ImportError as e:
... e
...
ImportError('No module named collections\r',)
So as Steven suspected there was a whitespace char in the module name:
pickle.load() was looking for the collections\r module.
Peter
Thank you for the suggestions. Opening the file in 'wb' mode worked.
Thanks,
Parag
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Re: Picking a license
--- On Sat, 5/15/10, Ben Finney ben+pyt...@benfinney.id.au wrote: From: Ben Finney ben+pyt...@benfinney.id.au Subject: Re: Picking a license To: python-list@python.org Date: Saturday, May 15, 2010, 12:57 AM a...@pythoncraft.com (Aahz) writes: You can't really sell Open Source software in any practical way; someone will always undercut you once it's out in the wild. You can only sell support for the software, which is entirely different. Not at all. I've been selling all the software I write for clients for the past ten years, and it's all free software. It's been very practical for me and those I've worked with. You can't sell free software like selling loaves of bread, but that's a much more limited case and a far cry from your claim. Selling free software is quite practical and a good way to fund development of software that otherwise wouldn't be written as free software. -- \ “Why am I an atheist? I ask you: Why is anybody not an atheist? | `\ Everyone starts out being an atheist.” —Andy Rooney, _Boston | _o__) Globe_ 1982-05-30 | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list Why don't your own customers under cut you? If you sell someone GPLed software they have the right to redistribute it for less than you are distributing it for. That dose not strike me as a viable business model. How do you make it work? -EdK Ed Keith e_...@yahoo.com Blog: edkeith.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Picking a license
--- On Sat, 5/15/10, Duncan Booth duncan.bo...@invalid.invalid wrote: From: Duncan Booth duncan.bo...@invalid.invalid Subject: Re: Picking a license To: python-list@python.org Date: Saturday, May 15, 2010, 8:52 AM Ed Keith e_...@yahoo.com wrote: I can not imagine anyone being stupid enough to pay me for rights to use code I had already published under the Boost License, which grants then the rights to do anything they want with it without paying me anything. -EdK Really? The Boost License says, amongst other things: THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. Are you sure you can't imagine anyone offering to pay you for an alternative license that came with some kind of warranty or support? -- http://mail.python.org/mailman/listinfo/python-list Would that be a license or a support contract? -EdK Ed Keith e_...@yahoo.com Blog: edkeith.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Is there conversion method to convert pyunicodeobject to pybyteobject?
Hi All, A variable whose data type is PyUnicodeObject is to be assigned to varioable of PyBytesObject type example : PyUnicodeObject *p = ...whatever...; function( (PyByteObject*p)); compiled and got a Bus Error. Cheers, Mathan -- http://mail.python.org/mailman/listinfo/python-list
Re: Picking a license
--- On Sat, 5/15/10, Lawrence D'Oliveiro l...@geek-central.gen.new_zealand wrote: From: Lawrence D'Oliveiro l...@geek-central.gen.new_zealand Subject: Re: Picking a license To: python-list@python.org Date: Saturday, May 15, 2010, 11:09 PM In message mailman.164.1273846256.32709.python-l...@python.org, Ed Keith wrote: But if my client give someone else a copy of the binary I gave them, they are now in violation. Why would they be in violation? It seems to me a violation would only occur if someone asked them for the source, and they refused. -- http://mail.python.org/mailman/listinfo/python-list No, the GPL makes it clear that the responsibly is on the distributor to either supply the source or written notice, Caveat venditor. The violation exists regardless of whether or not the recipient makes a request. -EdK Ed Keith e_...@yahoo.com Blog: edkeith.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Picking a license
Paul Boddie wrote: As I said before, spare me the condescension. Spare us your self-righteous bull-crap. Do you think we haven't seen your false accusations and made-up motives against Patrick Maupin? If I cared more and/or had more time, I'd make a summary -- but quite frankly Pat has defended himself quite well, while being very reasonable, and has said at least twice (more, I'm sure) that the choice of license is up to the author, and that there are good reasons for choosing any of the free licenses (including the GPL). ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
Convert PyUnicodeObject to PyBytesObject in python3.x?
Hi All, A variable whose data type is PyUnicodeObject needs to passed to a function as an argument whose data type should be PyBytesObject type example : PyUnicodeObject *p = ...whatever...; function (PyByteObject* a); function((PyBytesObject *)p); compiled and got a Bus Error. Thanks for spending ur valuable time. -- http://mail.python.org/mailman/listinfo/python-list
Conversion method for PyUnicodeObject type to PyBytesObject type
A variable whose data type is PyUnicodeObject needs to be passed to a
function as an argument whose data type should be PyBytesObject type
example :
function (PyByteObject* a){
.operations
}
PyUnicodeObject *p = somevalue;
function((PyBytesObject *)p);
ouptut: Got a Bus Error.
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Fw: Re: Re: joining files
Note: Forwarded message attached
-- Original Message --
From: mannu jhamannu_0...@rediffmail.com
To: tuomas.vesteri...@iki.fi
Subject: Re: Re: joining files---BeginMessage---
import os
def merge_sources(sources):
# sources is a list of tuples (source_name, source_data)
data = []
keysets = []
for nme, sce in sources:
lines = {}
for line in sce.split(os.linesep):
lst = line.split()
lines[lst[0]] = (nme, lst)
keysets.append(set(lines.keys()))
data.append(lines)
common_keys = keysets[0]
for keys in keysets[1:]:
common_keys = common_keys.intersection(keys)
result = {}
for key in common_keys:
result[key] = dict(d[key] for d in data if key in d)
return result
if __name__ == __main__:
# Your test files here are replaced by local strings
print merge_sources([(file1, file1), (file2, file2), (file3,
file3)])
print merge_sources([(input1, input1), (input2, input2)])
Test_results = '''
{'22': {'file3': ['22', 'C'],
'file2': ['22', '0'],
'file1': ['22', '110.1', '33', '331.5', '22.7', '5', '271.9'
'17.2', '33.4']}}
{'194': {'input2': ['194', 'C'],
'input1': ['194', '8.00', '121.23', '54.79', '4.12',
'180.06']},
'175': {'input2': ['175', 'H', '176', 'H', '180', 'H'],
'input1': ['175', '8.42', '120.50', '55.31', '4.04',
'180.33']},
'15': {'input2': ['15', 'H', '37', 'H', '95', 'T'],
'input1': ['15', '8.45', '119.04', '55.02', '4.08',
'178.89']},
'187': {'input2': ['187', 'H', '190', 'T'],
'input1': ['187', '7.79', '122.27', '54.37', '4.26',
'179.75']}}
Dear Sir,
I tried above program but with that it is showing error:
nmru...@caf:~ python join1.py
Traceback (most recent call last):
File join1.py, line 24, in
print merge_sources([(file1, file1), (file2, file2), (file3,file3)])
NameError: name 'file1' is not defined
nmru...@caf:~
Add test data to the code as:
file1 = '''22 110.1 33 331.5 22.7 5 271.9 17.2 33.4
4 55.1'''
Thankyou very much sir it is working..Thankyou once again for your kind
help.
only one problem I am now facing i.e. when I tried to replace test data with
filename 1.e.
file1 = open(input11.txt)
file2 = open(output22.txt)
print merge_sources([(file1, file1), (file2, file2)])
then it is showing error
ph08...@linux-af0n:~ python new.py
Traceback (most recent call last):
File new.py, line 25, in
print merge_sources([(file1, file1), (file2, file2)])
File new.py, line 9, in merge_sources
for line in sce.split(os.linesep):
AttributeError: 'file' object has no attribute 'split'
ph08...@linux-af0n:~
where my input11.txt is:
'''187 7.79 122.27 54.37 4.26 179.75
194 8.00 121.23 54.79 4.12 180.06
15 8.45 119.04 55.02 4.08 178.89
176 7.78 118.68 54.57 4.20 181.06
180 7.50 119.21 53.93 179.80
190 7.58 120.44 54.62 4.25 180.02
152 8.39 120.63 55.10 4.15 179.10
154 7.79 119.62 54.47 4.22 180.46
175 8.42 120.50 55.31 4.04 180.33'''
and output22.txt is:
'''15 H
37 H
95 T
124 H
130 H
152 H
154 H
158 H
164 H
175 H
176 H
180 H
187 H
190 T
194 C'''
since my files are very big hence i want to give filename as input.
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python and GNU plot
pls pls help how to use Gnuplot Gnuplot runs from Python under Vista downloaded Gnuplot, but what they suggest only Run wgnuplot.exe Thank you very much in advance!!! Sandy _ Hotmail: Trusted email with Microsoft’s powerful SPAM protection. https://signup.live.com/signup.aspx?id=60969-- http://mail.python.org/mailman/listinfo/python-list
subprocess and gvfs-mount
Hi, I'm coding a script that does some automates for my users ... including mounting a smb share. Because we are using Gnome, I choosed to use gvfs-mount, which is quite similar to Places Connect to Server ... Now my script does : print *** Mounting the FILER ... cmd = /usr/bin/gvfs-mount smb://%s\;%...@myfiler.domain.ch/data/%s % (my_domain, my_user_name, my_user_name) try: retCode = subprocess.call(cmd, shell=True) except KeyboardInterrupt, e: sys.stderr.write(Interrupted by ctrl-c. Exiting\n) sys.exit(1) if retCode != 0: sys.stderr.write(Error while mounting : %s\n % retCode) I have two major problems with this code : - In case of ctr-c while the password is asked to the user, I get a Terminal in which the output from keyboard is inhibited... (like while typing password) - When the user runs this script by double-click Run (not Run in terminal) ... there is no interaction with the user. I also did some try with subprocess.Popen ... with no success yet... Thanks for any comment or suggestion! Regards, Samuel Bancal ps : Or anyone knows how to get that gvfs-mount in GUI mode... Could see nautilus-connect-server ... but couldn't find any options. -- Samuel Bancal - CH -- http://mail.python.org/mailman/listinfo/python-list
Re: Re: joining files
On Mon, 17 May 2010 23:57:18 +0530 wrote Try: file = open(input11.txt) file1 = file.read() # file1 is a string file.close() or file1 = open(input11.txt) # file1 is an open file object and replace lines: for line in sce.split(os.linesep): lst = line.split() lines[lst[0]] = (nme, lst) with lines: for line in sce: lst = line.split() lines[lst[0]] = (nme, lst) sce.close() Thankyou very much sir it has worked. Thankyou once again. -- http://mail.python.org/mailman/listinfo/python-list
Re: Global variables for python applications
Steven D'Aprano st...@remove-this-cybersource.com.au wrote: I think it is an abuse of the term constant to allow you to talk about a mutable object being constant, since it can vary. Generally, you don't care about identity, only equality. Making up a syntax on the spot: constant pi = [3.1415] assert pi = 3.1415 pi[0] = 3 assert pi = 3.1415 makes a mockery of the concept of a constant. A better keyword might be something like 'alias' to imply that the name and value are interchangeable. -- Duncan Booth http://kupuguy.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this an ok thing to do in a class
On 18 May 2010 06:21:32 UTC+1, Vincent Davis vinc...@vincentdavis.net wrote: Just wondering if there is a problem with mixing a dictionary into a class like this. Everything seems to work as I would expect. No problem at all AFAIC. -- Cheers, Simon B. -- http://mail.python.org/mailman/listinfo/python-list
max time wait for a function
Hi, I've a question for you. I'd like to call a function and waiting its return value for a time max (30 sec). The function could not respond and then I must avoid to wait for infinite time. OS is Windows XP. Can you help me? Thank -- http://mail.python.org/mailman/listinfo/python-list
Re: max time wait for a function
On Tue, 2010-05-18 at 02:45 -0700, pacopyc wrote: Hi, I've a question for you. I'd like to call a function and waiting its return value for a time max (30 sec). The function could not respond and then I must avoid to wait for infinite time. OS is Windows XP. Can you help me? Thank This is how I do it with a function decorator. I probably borrowed this from someone and not attributed it. Anyway, it works on Linux, not sure about Windows: def function_timeout(seconds): Function decorator to raise a timeout on a function call import signal class FunctionTimeOut(Exception): pass def decorate(f): def timeout(signum, frame): raise FunctionTimeOut() def funct(*args, **kwargs): old = signal.signal(signal.SIGALRM, timeout) signal.alarm(seconds) try: result = f(*args, **kwargs) finally: signal.signal(signal.SIGALRM, old) signal.alarm(0) return result return funct return decorate -- http://mail.python.org/mailman/listinfo/python-list
Re: Can't find _sqlite3.so in lib-dynload
On Tue, May 18, 2010 at 5:38 AM, Peng Yu pengyu...@gmail.com wrote: On May 17, 6:38 pm, a...@pythoncraft.com (Aahz) wrote: In article mailman.323.1274135213.32709.python-l...@python.org, Peng Yu pengyu...@gmail.com wrote: I compiled python2.6.4 from source. But I can't find _sqlite3.so in the install directory. I thought that _sqlite3.so should be generated to the install directory. Would you please let me know how to fix it? Only if you provide some relevant details. Such as, what OS? http://www.mikeash.com/getting_answers.html ubuntu. Did the build process give a message at the end listing out the modules it couldn't build? Was _sqlite3 in that list? Do you have the sqlite3 dev package installed? With ubuntu, that's the libsqlite3-dev package. -- regards, kushal -- http://mail.python.org/mailman/listinfo/python-list
Re: subprocess and gvfs-mount
On Mon, 2010-05-17 at 17:54 +0200, Samuel Bancal wrote: Hi, I'm coding a script that does some automates for my users ... including mounting a smb share. Because we are using Gnome, I choosed to use gvfs-mount, which is quite similar to Places Connect to Server ...= Now my script does : print *** Mounting the FILER ... cmd = /usr/bin/gvfs-mount smb://%s\;% s...@myfiler.domain.ch/data/%s % (my_domain, my_user_name, my_user_name) try: retCode = subprocess.call(cmd, shell=True) except KeyboardInterrupt, e: sys.stderr.write(Interrupted by ctrl-c. Exiting\n) sys.exit(1) if retCode != 0: sys.stderr.write(Error while mounting : %s\n % retCode I have two major problems with this code : - In case of ctr-c while the password is asked to the user, I get a Terminal in which the output from keyboard is inhibited... (like while typing password) - When the user runs this script by double-click Run (not Run in terminal) ... there is no interaction with the user. Which is normal [there is a run-in-terminal check box somewhere?]. If your users are running it in GNOME then you should implement a GUI (PyGTK) for the user interaction [prompting for the password]. Or better use the GNOME keyring. http://pypi.python.org/pypi/keyring -- Adam Tauno Williams awill...@whitemice.org LPIC-1, Novell CLA http://www.whitemiceconsulting.com OpenGroupware, Cyrus IMAPd, Postfix, OpenLDAP, Samba -- http://mail.python.org/mailman/listinfo/python-list
Re: max time wait for a function
pacopyc wrote:
I'd like to call a function and waiting
its return value for a time max (30 sec).
The function could not respond and then I must avoid to wait for
infinite time. OS is Windows XP.
You can do that using the multiprocessing module, which is in the
standard library of Python 2.6 or better. It has certain limitations,
but works on XP.
The functions have to be defined at module scope, and the arguments
and return value must be pickleable. The way multiprocessing works on
Windows, it launches a new process which runs the Python interpreter
on the module again, and pickles the arguments to pipe them to the new
process.
Below is a simple working demo/test. The demo uses a timeout of 1
second, rather than the specified 30, to avoid excessive boringness.
In practice, timeout_function() would be recklessly inefficient for
controlling quick operations; it creates a new pool of processes for
each function call that it might need to time-out. That's fixable, but
the question here is about a 30-second-plus processing problem, and in
that kind of case the overhead of creating one or a few new processes
is lost in the noise.
-Bryan Olson
#
from multiprocessing import Pool, TimeoutError
def timeout_function(timeout, f, args=(), kwargs={}):
Return f(*args, **kwargs), or if that takes
to long raise multiprocessing.TimeoutError.
pool = Pool(1)
return pool.apply_async(f, args, kwargs).get(timeout)
#--
# simple demo-test:
from random import random as rand
from time import sleep
def sillyfunc(sleeptime):
# Time-absorbing function for testing
sleep(sleeptime)
return 'Done.'
if __name__ == '__main__':
timeout = 1.0
print Timeout is %f seconds % timeout
trials = 100
ntimeouts = 0
for _ in range(trials):
# time-out probability a bit over 0.5
sleeptime = rand() * timeout * 2
try:
result = timeout_function(
timeout,
sillyfunc,
(sleeptime,))
assert result == 'Done.'
print 'Ran without timing out'
except TimeoutError:
ntimeouts += 1
print 'Timed out'
if sleeptime timeout:
print '...Sucks! Slept %f' % sleeptime
print 'Timed out %d out of %d' % (ntimeouts, trials)
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Regular expression
Hi, I have a string like this: 0x340x5A0x9B0xBA I want to extract 0x from the string but the first one. How I can use re for this case? The string size will vary. TIA -- http://mail.python.org/mailman/listinfo/python-list
Re: Regular expression
On May 18, 3:48 pm, Back9 backgoo...@gmail.com wrote:
Hi,
I have a string like this:
0x340x5A0x9B0xBA
I want to extract 0x from the string but the first one.
How I can use re for this case?
The string size will vary.
TIA
Maybe the easy way is something like this:
m = re.match('(0x)(.*)','0x340x5A0x9B0xBA')
m.groups()[1]
Terenzio
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Re: Regular expression
On May 18, 10:09 am, ilvecchio terenzio.be...@gmail.com wrote:
On May 18, 3:48 pm, Back9 backgoo...@gmail.com wrote:
Hi,
I have a string like this:
0x340x5A0x9B0xBA
I want to extract 0x from the string but the first one.
How I can use re for this case?
The string size will vary.
TIA
Maybe the easy way is something like this:
m = re.match('(0x)(.*)','0x340x5A0x9B0xBA')
m.groups()[1]
Terenzio
I mean the result should be like this:
0x345A9BBA
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Multi-Threading in Python
Can anyone tell me how easy it is to do multi-threading in Python? This has probably been brought up already, so if it has, thanks anyway -- http://mail.python.org/mailman/listinfo/python-list
Re: Regular expression
On 18 May, 15:32, Back9 backgoo...@gmail.com wrote:
On May 18, 10:09 am, ilvecchio terenzio.be...@gmail.com wrote:
On May 18, 3:48 pm, Back9 backgoo...@gmail.com wrote:
Hi,
I have a string like this:
0x340x5A0x9B0xBA
I want to extract 0x from the string but the first one.
How I can use re for this case?
The string size will vary.
TIA
Maybe the easy way is something like this:
m = re.match('(0x)(.*)','0x340x5A0x9B0xBA')
m.groups()[1]
Terenzio
I mean the result should be like this:
0x345A9BBA
Something like: re.sub(r'\B(0x)', '', s)
hth, Jon.
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Re: Regular expression
Don't use regular expressions for that.
s = '0x340x5A0x9B0xBA'
return '0x' + ''.join(s.split('0x'))
On Tue, 2010-05-18 at 06:48 -0700, Back9 wrote:
Hi,
I have a string like this:
0x340x5A0x9B0xBA
I want to extract 0x from the string but the first one.
How I can use re for this case?
The string size will vary.
TIA
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Re: Multi-Threading in Python
On Tue, 2010-05-18 at 07:35 -0700, Lou wrote: Can anyone tell me how easy it is to do multi-threading in Python? Very easy. Or as easy as in any other platform - and as easy to screw up. Personally I prefer to use multiprocessing [which is a module that 'simulates' threads using separate processes]. IMO, it is hard to screw up as you don't get any shared-state for free. This has probably been brought up already, so if it has, thanks anyway -- Adam Tauno Williams awill...@whitemice.org LPIC-1, Novell CLA http://www.whitemiceconsulting.com OpenGroupware, Cyrus IMAPd, Postfix, OpenLDAP, Samba -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this an ok thing to do in a class
Simon Brunning a écrit : On 18 May 2010 06:21:32 UTC+1, Vincent Davis vinc...@vincentdavis.net wrote: Just wondering if there is a problem with mixing a dictionary into a class like this. Everything seems to work as I would expect. No problem at all AFAIC. OP didn't show up on c.l.py, so too bad you snipped the relevant code snippet... -- http://mail.python.org/mailman/listinfo/python-list
Re: abc don't play well with private method
mouadino a écrit : Hello and thanx for your answer it's was very helpful but just to clear some thinks : There's no such thing as a private attribute in Python. The name-mangling mechanism invoked by __name is really meant to avoid accidental redefinition of the attribute in a derived class. In this case, your attribute is expected to be redefined, so you definitly don't want any name mangling here. yes , but what i have supposed is that the name mangling will not be applied when you use abc especially when you decorate the function with abc.abstractmethod , because it's will(should) be redefined (so something is wrong with the abc module) . I agree this might be a bit inconsistant - or at least that your expectations were rather understandable. But well, that's how it is and you'll have to deal with it for at least a few years. Now I bet the name_mangling mechanism is applied in such a way that implementing your expectations would be rather impractical or add way to much overhead. Specially when almost no one ever seem to find a use for this feature. As far as I'm concerned, I think I didn't used it more half a dozen times, for some very deep implementation detail of some miniframework, and mostly because I'm a bit on the paranoid side. Also and FWIW, the naming convention for implementation attributes is a single leading underscore sorry but i don't agree on this. So you disagree with the established convention followed by (wild guess) about 99.99% of the regulars here and applied in most of the existing python code base. the two underscore (__) are used in classes level for defining private method in the python way, The __names are used to invoke name mangling on the attribute (whatever type it is). It doesn't make it private - just a bit less subject to accidental override. And - I have ton insist on this - it applies to every attribute. FWIW, Python's methods are really not what you may think they are !-) and the one underscore (_) is used in the module level : ... to avoid export such named symbols in the case of a wildcard import AND if the module didn't defined an __ALL__ attribute. The _names are used to denote implementation attribute - IOW, don't touch unless you're ready to pay the price. Prepending a single underscore (_) has some support for protecting module variables and functions (not included with import * from). Prepending a double underscore (__) to an instance variable or method effectively serves to make the variable or method private to its class (using name mangling). src:http://google-styleguide.googlecode.com/svn/trunk/pyguide.html This is at best badly formulated and really needs a rewrite. -- http://mail.python.org/mailman/listinfo/python-list
RE: Multi-Threading in Python
great can help to find some examples of multiprocessing Sandy Subject: Re: Multi-Threading in Python From: awill...@whitemice.org To: python-list@python.org Date: Tue, 18 May 2010 10:45:11 -0400 On Tue, 2010-05-18 at 07:35 -0700, Lou wrote: Can anyone tell me how easy it is to do multi-threading in Python? Very easy. Or as easy as in any other platform - and as easy to screw up. Personally I prefer to use multiprocessing [which is a module that 'simulates' threads using separate processes]. IMO, it is hard to screw up as you don't get any shared-state for free. This has probably been brought up already, so if it has, thanks anyway -- Adam Tauno Williams awill...@whitemice.org LPIC-1, Novell CLA http://www.whitemiceconsulting.com OpenGroupware, Cyrus IMAPd, Postfix, OpenLDAP, Samba -- http://mail.python.org/mailman/listinfo/python-list _ Hotmail: Free, trusted and rich email service. https://signup.live.com/signup.aspx?id=60969-- http://mail.python.org/mailman/listinfo/python-list
Getting System error with PyModule_AddIntConstant funtion
Following is a Python C api which runs properly without PyModule_AddIntConstant
function.
But when PyModule_AddIntConstant() function is used, getting the following
error when i call
c. path(test call);
SystemError: NULL result without error in PyObject_Call
Python C api- c.c
int test(int a){
return (2*a+a);
}
PyObject* dict = NULL;
static PyObject* path(PyObject* self, PyObject* args) {
char *cpath;
PyUnicodeObject *path;
PyUnicodeObject *test;
if (!PyArg_ParseTuple(args, s, amp;path))
return NULL;
cpath = (char *)path;
test = (PyUnicodeObject*)(cpath);
PyObject *testDict = PyDict_New();
int testVal = PyDict_SetItem(testDict, (PyObject
*)PyUnicode_FromString(cpath), (PyObject *)PyUnicode_FromString(cpath));
return Py_BuildValue(s, test);
}
static PyObject* c(PyObject* self, PyObject* args) {
int a;
int result;
if(!PyArg_ParseTuple(args, i, amp;a))
return NULL;
result = test(a);
return Py_BuildValue(i, result);
}
static PyMethodDef cmethods[] = {
{c, c, METH_VARARGS, watch},
{path, path, METH_VARARGS, test},
{NULL, NULL, 0, NULL},
};
static struct PyModuleDef c_Module = {
PyModuleDef_HEAD_INIT,
c,
(
Interface.
),
-1,
cmethods
};
PyMODINIT_FUNC PyInit_c(void) {
PyObject* obj = PyModule_Create(amp;c_Module);
long lon1 = 0;
PyModule_AddIntConstant(obj, test, lon1);
}
int main(int argc, wchar_t *argv[])
{
PyImport_AppendInittab(c, PyInit_c);
Py_SetProgramName(argv[0]);
Py_Initialize();
PyImport_ImportModule(c);
return 0;
}
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Re: Getting System error with PyModule_AddIntConstant funtion
On May 18, 2010, at 11:41 AM, MathanK wrote:
Following is a Python C api which runs properly without
PyModule_AddIntConstant function.
But when PyModule_AddIntConstant() function is used, getting the
following error when i call
c. path(test call);
SystemError: NULL result without error in PyObject_Call
Hi Mathan,
You're not checking the return code from PyModule_Create(). Is it
returning NULL?
Also, there's a list specific to Python's C API. You might get a
better response to your question there:
http://mail.python.org/mailman/listinfo/capi-sig
bye
Philip
Python C api- c.c
int test(int a){
return (2*a+a);
}
PyObject* dict = NULL;
static PyObject* path(PyObject* self, PyObject* args) {
char *cpath;
PyUnicodeObject *path;
PyUnicodeObject *test;
if (!PyArg_ParseTuple(args, s, amp;path))
return NULL;
cpath = (char *)path;
test = (PyUnicodeObject*)(cpath);
PyObject *testDict = PyDict_New();
int testVal = PyDict_SetItem(testDict, (PyObject
*)PyUnicode_FromString(cpath), (PyObject
*)PyUnicode_FromString(cpath));
return Py_BuildValue(s, test);
}
static PyObject* c(PyObject* self, PyObject* args) {
int a;
int result;
if(!PyArg_ParseTuple(args, i, amp;a))
return NULL;
result = test(a);
return Py_BuildValue(i, result);
}
static PyMethodDef cmethods[] = {
{c, c, METH_VARARGS, watch},
{path, path, METH_VARARGS, test},
{NULL, NULL, 0, NULL},
};
static struct PyModuleDef c_Module = {
PyModuleDef_HEAD_INIT,
c,
(
Interface.
),
-1,
cmethods
};
PyMODINIT_FUNC PyInit_c(void) {
PyObject* obj = PyModule_Create(amp;c_Module);
long lon1 = 0;
PyModule_AddIntConstant(obj, test, lon1);
}
int main(int argc, wchar_t *argv[])
{
PyImport_AppendInittab(c, PyInit_c);
Py_SetProgramName(argv[0]);
Py_Initialize();
PyImport_ImportModule(c);
return 0;
}
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Re: getting attributes and methods of class without creating object
On 5/18/2010 2:11 AM, shuvro wrote: to know the attributes of an instance of a class without actually creating that instance is very difficult. Is it not possible with the existing python facilities (without adding external libraries) ? To know what a function would do if you were to call it, without actually calling it, look at the function code with the dis (assembler) module. #3.1 import dis class C: def __init__(self, a): self.a = a dis.dis(C.__init__) 2 0 LOAD_FAST1 (a) 3 LOAD_FAST0 (self) 6 STORE_ATTR 0 (a) 9 LOAD_CONST 0 (None) 12 RETURN_VALUE If you read the doc, or know assembler, you would see that the instance gets attribute a. Use dir(C) to find all the methods to disassemble. Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Picking a license
On 2010-05-16 09:25 , Ed Keith wrote: --- On Sat, 5/15/10, Lawrence D'Oliveirol...@geek-central.gen.new_zealand wrote: From: Lawrence D'Oliveirol...@geek-central.gen.new_zealand Subject: Re: Picking a license To: python-list@python.org Date: Saturday, May 15, 2010, 11:09 PM In messagemailman.164.1273846256.32709.python-l...@python.org, Ed Keith wrote: But if my client give someone else a copy of the binary I gave them, they are now in violation. Why would they be in violation? It seems to me a violation would only occur if someone asked them for the source, and they refused. -- http://mail.python.org/mailman/listinfo/python-list No, the GPL makes it clear that the responsibly is on the distributor to either supply the source or written notice, Caveat venditor. The violation exists regardless of whether or not the recipient makes a request. No, one of the options for you is that you make the source available upon request. -- 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: Multi-Threading in Python
On Tue, May 18, 2010 at 7:35 AM, Lou louro...@gmail.com wrote: Can anyone tell me how easy it is to do multi-threading in Python? This has probably been brought up already, so if it has, thanks anyway -- http://mail.python.org/mailman/listinfo/python-list It's very easy, but it's probably best to use multiple processes to take advantage of multiple cores. Take a look at the threading and multiprocessing modules. Geremy Condra -- http://mail.python.org/mailman/listinfo/python-list
Discover PyH
Hi all, I would like to present my first python library : PyH. PyH is a concise and powerful module that lets you build your HTML pages like a GUI. Tags are objects that can be created, included and modified at any time during your script. Discover it at http://pyh.googlecode.com . You can file bug reports and feature requests at https://launchpad.net/pyh . Cheers, Emmanuel Turlay -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there conversion method to convert pyunicodeobject to pybyteobject?
On 5/15/2010 10:50 AM, MathanK wrote:
This is the third time, at least, that you posted this, though the first
time you asked a question. You have given no indication that you
bothered to look in the manual before or between postings.
A variable whose data type is PyUnicodeObject is to be assigned to
varioable of PyBytesObject type
example :
PyUnicodeObject *p = ...whatever...;
function( (PyByteObject*p));
C casting is usually not conversion. It says pretend that the data is
another type, even though it is not. Only use it when you actually know
what you are doing.
compiled and got a Bus Error.
In Python, b = p.encode('utf-8') or whatever encoding you want. Look in
the C-API manual for the CPython function that actually does this.
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Re: max time wait for a function
On 5/18/2010 6:24 AM, Albert Hopkins wrote: On Tue, 2010-05-18 at 02:45 -0700, pacopyc wrote: Hi, I've a question for you. I'd like to call a function and waiting its return value for a time max (30 sec). The function could not respond and then I must avoid to wait for infinite time. OS is Windows XP. Can you help me? Thank This is how I do it with a function decorator. I probably borrowed this from someone and not attributed it. Anyway, it works on Linux, not sure about Windows: def function_timeout(seconds): Function decorator to raise a timeout on a function call import signal class FunctionTimeOut(Exception): pass def decorate(f): def timeout(signum, frame): raise FunctionTimeOut() def funct(*args, **kwargs): old = signal.signal(signal.SIGALRM, timeout) signal.alarm(seconds) from help(signal): alarm() -- cause SIGALRM after a specified time [Unix only] I do not know of any replacement in the stdlib, but one could check the code for multiprocessing to see how it does a timeout. Or check the pywin32 library http://pypi.python.org/pypi/pywin32/210 try: result = f(*args, **kwargs) finally: signal.signal(signal.SIGALRM, old) signal.alarm(0) return result return funct return decorate -- http://mail.python.org/mailman/listinfo/python-list
Re: Multi-Threading in Python
On 5/18/2010 11:29 AM, Sandy Ydnas wrote: can help to find some examples of multiprocessing Multiprocessing is designed to be api-compatible with threading. Search the archives of this list/newsgroup for several examples. -- http://mail.python.org/mailman/listinfo/python-list
RE: Multi-Threading in Python
On Tue, 2010-05-18 at 20:29 +0500, Sandy Ydnas wrote: great can help to find some examples of multiprocessing There is the reasonably good documentation at: http://docs.python.org/library/multiprocessing.html I did a Multiprocessing presentation recently: http://groups.google.com/group/grpug/web/Multiprocessing.pdf And I use multiprocessing in my project; but less than previously as I now use AMQ for the IPC and multiprocessing only for the process management. http://coils.hg.sourceforge.net/hgweb/coils/coils/file/af60dd17fa0e But an entire project is quite a bit to pick through. Subject: Re: Multi-Threading in Python From: awill...@whitemice.org To: python-list@python.org Date: Tue, 18 May 2010 10:45:11 -0400 On Tue, 2010-05-18 at 07:35 -0700, Lou wrote: Can anyone tell me how easy it is to do multi-threading in Python? Very easy. Or as easy as in any other platform - and as easy to screw up. Personally I prefer to use multiprocessing [which is a module that 'simulates' threads using separate processes]. IMO, it is hard to screw up as you don't get any shared-state for free. This has probably been brought up already, so if it has, thanks anyway -- Adam Tauno Williams awill...@whitemice.org LPIC-1, Novell CLA http://www.whitemiceconsulting.com OpenGroupware, Cyrus IMAPd, Postfix, OpenLDAP, Samba -- http://mail.python.org/mailman/listinfo/python-list __ Hotmail: Free, trusted and rich email service. Get it now. -- http://mail.python.org/mailman/listinfo/python-list
Re: Picking a license
--- On Tue, 5/18/10, Robert Kern robert.k...@gmail.com wrote: From: Robert Kern robert.k...@gmail.com Subject: Re: Picking a license To: python-list@python.org Date: Tuesday, May 18, 2010, 12:03 PM On 2010-05-16 09:25 , Ed Keith wrote: --- On Sat, 5/15/10, Lawrence D'Oliveirol...@geek-central.gen.new_zealand wrote: From: Lawrence D'Oliveirol...@geek-central.gen.new_zealand Subject: Re: Picking a license To: python-list@python.org Date: Saturday, May 15, 2010, 11:09 PM In messagemailman.164.1273846256.32709.python-l...@python.org, Ed Keith wrote: But if my client give someone else a copy of the binary I gave them, they are now in violation. Why would they be in violation? It seems to me a violation would only occur if someone asked them for the source, and they refused. -- http://mail.python.org/mailman/listinfo/python-list No, the GPL makes it clear that the responsibly is on the distributor to either supply the source or written notice, Caveat venditor. The violation exists regardless of whether or not the recipient makes a request. No, one of the options for you is that you make the source available upon request. But I am required to give written notice to that effect. -EdK Ed Keith e_...@yahoo.com Blog: edkeith.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: pickle unable to load collection
On 5/18/2010 3:10 AM, Peter Otten wrote:
Now simulate the effect of writing in text mode and reading in binary mode:
garbled_data = data.replace(\n, \r\n)
pickle.loads(garbled_data)
Traceback (most recent call last):
...
ImportError: No module named collections
try: pickle.loads(garbled_data)
... except ImportError as e:
... e
...
ImportError('No module named collections\r',)
Nice catch, Peter. I filed a request that the message quote the name it
cannot import, so that the OP would have seen the more informative
ImportError: No module named 'collections\r'
http://bugs.python.org/issue8754
Terry Jan Reedy
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RE: Multi-Threading in Python
good thanks a lot Sandy Subject: RE: Multi-Threading in Python From: awill...@whitemice.org To: python-list@python.org Date: Tue, 18 May 2010 12:45:37 -0400 On Tue, 2010-05-18 at 20:29 +0500, Sandy Ydnas wrote: great can help to find some examples of multiprocessing There is the reasonably good documentation at: http://docs.python.org/library/multiprocessing.html I did a Multiprocessing presentation recently: http://groups.google.com/group/grpug/web/Multiprocessing.pdf And I use multiprocessing in my project; but less than previously as I now use AMQ for the IPC and multiprocessing only for the process management. http://coils.hg.sourceforge.net/hgweb/coils/coils/file/af60dd17fa0e But an entire project is quite a bit to pick through. Subject: Re: Multi-Threading in Python From: awill...@whitemice.org To: python-list@python.org Date: Tue, 18 May 2010 10:45:11 -0400 On Tue, 2010-05-18 at 07:35 -0700, Lou wrote: Can anyone tell me how easy it is to do multi-threading in Python? Very easy. Or as easy as in any other platform - and as easy to screw up. Personally I prefer to use multiprocessing [which is a module that 'simulates' threads using separate processes]. IMO, it is hard to screw up as you don't get any shared-state for free. This has probably been brought up already, so if it has, thanks anyway -- Adam Tauno Williams awill...@whitemice.org LPIC-1, Novell CLA http://www.whitemiceconsulting.com OpenGroupware, Cyrus IMAPd, Postfix, OpenLDAP, Samba -- http://mail.python.org/mailman/listinfo/python-list __ Hotmail: Free, trusted and rich email service. Get it now. -- http://mail.python.org/mailman/listinfo/python-list _ Hotmail: Trusted email with powerful SPAM protection. https://signup.live.com/signup.aspx?id=60969-- http://mail.python.org/mailman/listinfo/python-list
Re: Regular expression
On 5/18/2010 10:40 AM, J. Cliff Dyer wrote:
Don't use regular expressions for that.
s = '0x340x5A0x9B0xBA'
return '0x' + ''.join(s.split('0x'))
or
'0x'+s[2:].replace('0x','')
'0x345A9BBA'
Take your pick, you should learn and understand both.
On Tue, 2010-05-18 at 06:48 -0700, Back9 wrote:
Hi,
I have a string like this:
0x340x5A0x9B0xBA
I want to extract 0x from the string but the first one.
How I can use re for this case?
The string size will vary.
TIA
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Re: Picking a license
On May 18, 11:03 am, Robert Kern robert.k...@gmail.com wrote: On 2010-05-16 09:25 , Ed Keith wrote: No, the GPL makes it clear that the responsibly is on the distributor to either supply the source or written notice, Caveat venditor. The violation exists regardless of whether or not the recipient makes a request. No, one of the options for you is that you make the source available upon request. Do you have a citation for that? My reading, of both GPL v2 section 3 and GPL v3 section 6, is that someone distributing GPL licensed object must do one of the following: - supply the source with the object - supply a written offer for source with the object - supply a copy of someone else's written offer for source with the object (only allowed sometimes) - Perhaps verbally communicate an offer (GPL v2 only, very liberal reading of 3c, but even then the communication must accompany the object distribution). - supply object by offering access from a designated place as long as you offer equivalent access to the Corresponding Source in the same way through the same place or you maintain clear directions next to the object code saying where to find the Corresponding Source. That last one effectively has written offer defined in a slightly different way (maintain clear directions), and also might allow you to just have a pile of source DVDs adjacent to a pile of object CDs with no explicit written offer, but I honestly can't see how even that can be stretched to cover just handing somebody an object CD without even mentioning that source is available, and then only later giving them source if they explicitly ask for it. Sure, if you give somebody source after they ask for it, you have probably cured any violation, but I think the very act of handing someone an object CD without source or a written offer of source would put you in violation of the license at the time you give them the object CD. It may be that saying oh, by the way, source code's available if you want it would suffice in some cases under GPL v2, but it doesn't look like that would work at all for GPL v3. Regards, Pat -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting System error with PyModule_AddIntConstant funtion
I checked for Null also. But No change in the result. Still getting the system
error.
But when i m calling only c.c(5) function and not calling c.path(hi python c
api) function, i m getting proper output without any system error.
Any clue?
Subject: Re: Getting System error with PyModule_AddIntConstant funtion
From: Philip Semanchuk lt;phi...@semanchuk.comgt;
Date: Tue, 18 May 2010 11:50:46 -0400
To: python-list (General) lt;python-list@python.orggt;
- Contents -
On May 18, 2010, at 11:41 AM, MathanK wrote:
gt; Following is a Python C api which runs properly without
gt; PyModule_AddIntConstant function.
gt;
gt;
gt; But when PyModule_AddIntConstant() function is used, getting the
gt; following error when i call
gt; c. path(test call);
gt; SystemError: NULL result without error in PyObject_Call
Hi Mathan,
You're not checking the return code from PyModule_Create(). Is it
returning NULL?
Also, there's a list specific to Python's C API. You might get a
better response to your question there:
http://mail.python.org/mailman/listinfo/capi-sig
bye
Philip
gt;
gt;
gt; Python C api- c.c
gt;
gt;
gt; int test(int a){
gt; return (2*a+a);
gt; }
gt;
gt;
gt; PyObject* dict = NULL;
gt;
gt;
gt; static PyObject* path(PyObject* self, PyObject* args) {
gt; char *cpath;
gt; PyUnicodeObject *path;
gt; PyUnicodeObject *test;
gt;
gt;
gt; if (!PyArg_ParseTuple(args, s, amp;amp;path))
gt; return NULL;
gt; cpath = (char *)path;
gt; test = (PyUnicodeObject*)(cpath);
gt; PyObject *testDict = PyDict_New();
gt; int testVal = PyDict_SetItem(testDict, (PyObject
gt; *)PyUnicode_FromString(cpath), (PyObject
gt; *)PyUnicode_FromString(cpath));
gt;
gt; return Py_BuildValue(s, test);
gt; }
gt; static PyObject* c(PyObject* self, PyObject* args) {
gt;
gt; int a;
gt; int result;
gt; if(!PyArg_ParseTuple(args, i, amp;amp;a))
gt; return NULL;
gt; result = test(a);
gt; return Py_BuildValue(i, result);
gt;
gt; }
gt;
gt;
gt; static PyMethodDef cmethods[] = {
gt; {c, c, METH_VARARGS, watch},
gt; {path, path, METH_VARARGS, test},
gt; {NULL, NULL, 0, NULL},
gt; };
gt;
gt;
gt; static struct PyModuleDef c_Module = {
gt; PyModuleDef_HEAD_INIT,
gt; c,
gt; (
gt; Interface.
gt; ),
gt; -1,
gt; cmethods
gt; };
gt;
gt;
gt; PyMODINIT_FUNC PyInit_c(void) {
gt;
gt; PyObject* obj = PyModule_Create(amp;amp;c_Module);
gt; long lon1 = 0;
gt; PyModule_AddIntConstant(obj, test, lon1);
gt;
gt; }
gt;
gt;
gt; int main(int argc, wchar_t *argv[])
gt; {
gt; PyImport_AppendInittab(c, PyInit_c);
gt; Py_SetProgramName(argv[0]);
gt; Py_Initialize();
gt; PyImport_ImportModule(c);
gt; return 0;
gt; }
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recall function definition from shell
def myfun(): ... return WOW ... myfun() 'WOW' now, i would like to list the funcion definition, something like this: myfun.somethinglikethis() def myfun(): return WOW is there something like this around? bye -- http://mail.python.org/mailman/listinfo/python-list
upgrade python
Would it be safe to upgrade from python 2.6.4 to 2.6.5 without hurting the 2.6.4? -- http://mail.python.org/mailman/listinfo/python-list
Re: recall function definition from shell
On May 18, 12:31 pm, superpollo ute...@esempio.net wrote: def myfun(): ... return WOW ... myfun() 'WOW' now, i would like to list the funcion definition, something like this: myfun.somethinglikethis() def myfun(): return WOW is there something like this around? bye Sure, just give it a docstring and then you can call help on it: def myfun(): ... ''' myfun returns WOW when called. ... This is just a Python __doc__ string ... ''' ... return WOW ... help(myfun) Regards, Pat -- http://mail.python.org/mailman/listinfo/python-list
Re: recall function definition from shell
Patrick Maupin ha scritto: On May 18, 12:31 pm, superpollo ute...@esempio.net wrote: def myfun(): ... return WOW ... myfun() 'WOW' now, i would like to list the funcion definition, something like this: myfun.somethinglikethis() def myfun(): return WOW is there something like this around? bye Sure, just give it a docstring and then you can call help on it: def myfun(): ... ''' myfun returns WOW when called. ... This is just a Python __doc__ string ... ''' ... return WOW ... help(myfun) Regards, Pat mmm... thanks but not quite what i meant :-( bye -- http://mail.python.org/mailman/listinfo/python-list
Re: recall function definition from shell
On May 18, 1:41 pm, superpollo ute...@esempio.net wrote:
Patrick Maupin ha scritto:
On May 18, 12:31 pm, superpollo ute...@esempio.net wrote:
def myfun():
... return WOW
...
myfun()
'WOW'
now, i would like to list the funcion definition, something like this:
myfun.somethinglikethis()
def myfun():
return WOW
is there something like this around?
bye
Sure, just give it a docstring and then you can call help on it:
def myfun():
... ''' myfun returns WOW when called.
... This is just a Python __doc__ string
... '''
... return WOW
...
help(myfun)
Regards,
Pat
mmm... thanks but not quite what i meant :-(
bye
Well, I don't think Python remembers exactly how you typed it in, but
you can always ask Python for what it remembers about the function:
def myfun():
... return WOW
...
import dis
dis.dis(myfun)
2 0 LOAD_CONST 1 ('WOW')
3 RETURN_VALUE
The inspect module is useful, as well. But AFAIK Python doesn't
remember the source code for stuff you typed in. (For functions in
imported modules, there is sufficient information remembered for
tracebacks to allow you to print out the lines of a function.)
Regards,
Pat
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Re: recall function definition from shell
Patrick Maupin ha scritto: On May 18, 1:41 pm, superpollo ute...@esempio.net wrote: Patrick Maupin ha scritto: On May 18, 12:31 pm, superpollo ute...@esempio.net wrote: def myfun(): ... return WOW ... myfun() 'WOW' now, i would like to list the funcion definition, something like this: myfun.somethinglikethis() def myfun(): return WOW is there something like this around? bye Sure, just give it a docstring and then you can call help on it: def myfun(): ... ''' myfun returns WOW when called. ... This is just a Python __doc__ string ... ''' ... return WOW ... help(myfun) Regards, Pat mmm... thanks but not quite what i meant :-( bye Well, I don't think Python remembers exactly how you typed it in yes python does not, but maybe the *shell* does, or so i thought. i just wanted to dump the code for the function in a file, after i tested in the shell... -- http://mail.python.org/mailman/listinfo/python-list
Re: recall function definition from shell
superpollo wrote: Patrick Maupin ha scritto: On May 18, 1:41 pm, superpollo ute...@esempio.net wrote: Patrick Maupin ha scritto: On May 18, 12:31 pm, superpollo ute...@esempio.net wrote: def myfun(): ... return WOW ... myfun() 'WOW' now, i would like to list the funcion definition, something like this: myfun.somethinglikethis() def myfun(): return WOW is there something like this around? bye Sure, just give it a docstring and then you can call help on it: def myfun(): ... ''' myfun returns WOW when called. ... This is just a Python __doc__ string ... ''' ... return WOW ... help(myfun) Regards, Pat mmm... thanks but not quite what i meant :-( bye Well, I don't think Python remembers exactly how you typed it in yes python does not, but maybe the *shell* does, or so i thought. i just wanted to dump the code for the function in a file, after i tested in the shell... You could try ipython: $ ipython Python 2.6.4 (r264:75706, Dec 7 2009, 18:43:55) Type copyright, credits or license for more information. IPython 0.10 -- An enhanced Interactive Python. ? - Introduction and overview of IPython's features. %quickref - Quick reference. help - Python's own help system. object? - Details about 'object'. ?object also works, ?? prints more. In [1]: def f(): ...: return 42 ...: In [2]: f() Out[2]: 42 In [3]: %save tmp.py 1 The following commands were written to file `tmp.py`: def f(): return 42 In [4]: Do you really want to exit ([y]/n)? $ cat tmp.py def f(): return 42 $ Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: pickle unable to load collection
Terry Reedy wrote: Nice catch, Peter. I filed a request that the message quote the name it cannot import, so that the OP would have seen the more informative ImportError: No module named 'collections\r' http://bugs.python.org/issue8754 Good idea; thank you for taking the initiative. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: recall function definition from shell
Peter Otten ha scritto: superpollo wrote: Patrick Maupin ha scritto: On May 18, 1:41 pm, superpollo ute...@esempio.net wrote: Patrick Maupin ha scritto: On May 18, 12:31 pm, superpollo ute...@esempio.net wrote: def myfun(): ... return WOW ... myfun() 'WOW' now, i would like to list the funcion definition, something like this: myfun.somethinglikethis() def myfun(): return WOW is there something like this around? bye Sure, just give it a docstring and then you can call help on it: def myfun(): ... ''' myfun returns WOW when called. ... This is just a Python __doc__ string ... ''' ... return WOW ... help(myfun) Regards, Pat mmm... thanks but not quite what i meant :-( bye Well, I don't think Python remembers exactly how you typed it in yes python does not, but maybe the *shell* does, or so i thought. i just wanted to dump the code for the function in a file, after i tested in the shell... You could try ipython: $ ipython Python 2.6.4 (r264:75706, Dec 7 2009, 18:43:55) Type copyright, credits or license for more information. IPython 0.10 -- An enhanced Interactive Python. ? - Introduction and overview of IPython's features. %quickref - Quick reference. help - Python's own help system. object? - Details about 'object'. ?object also works, ?? prints more. In [1]: def f(): ...: return 42 ...: In [2]: f() Out[2]: 42 In [3]: %save tmp.py 1 The following commands were written to file `tmp.py`: def f(): return 42 In [4]: Do you really want to exit ([y]/n)? $ cat tmp.py def f(): return 42 $ Peter RUNS TO APT-GET hey great! thanks a lot! best regards -- http://mail.python.org/mailman/listinfo/python-list
Re: recall function definition from shell
superpollo wrote: Patrick Maupin ha scritto: On May 18, 1:41 pm, superpollo ute...@esempio.net wrote: Patrick Maupin ha scritto: On May 18, 12:31 pm, superpollo ute...@esempio.net wrote: def myfun(): ... return WOW ... myfun() 'WOW' now, i would like to list the funcion definition, something like this: myfun.somethinglikethis() def myfun(): return WOW is there something like this around? bye Sure, just give it a docstring and then you can call help on it: def myfun(): ... ''' myfun returns WOW when called. ... This is just a Python __doc__ string ... ''' ... return WOW ... help(myfun) Regards, Pat mmm... thanks but not quite what i meant :-( bye Well, I don't think Python remembers exactly how you typed it in yes python does not, but maybe the *shell* does, or so i thought. i just wanted to dump the code for the function in a file, after i tested in the shell... Take a look at ipython -- it has many enhancements: ipython.scipy.org ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
Re: recall function definition from shell
Am 18.05.2010 20:55, schrieb superpollo: yes python does not, but maybe the *shell* does, or so i thought. i just wanted to dump the code for the function in a file, after i tested in the shell... You might want to have a look at the IPython shell [1]. I personally do not use it myself, but I thought to remember that it had some feature like this (perhaps not dump _one function_, but all the input, which you then only need to cleanup). A quick glance revealed f.ex. the history and edit functionality [2] -- a bit more digging might really show up the thing you are looking for. - René [1] http://ipython.scipy.org/ [2] http://ipython.scipy.org/doc/manual/html/interactive/tutorial.html#source-code-handling-tips signature.asc Description: OpenPGP digital signature -- http://mail.python.org/mailman/listinfo/python-list
Re: Picking a license
Ben Finney wrote: a...@pythoncraft.com (Aahz) writes: Ben Finney ben+pyt...@benfinney.id.au wrote: [It is impractical to] sell free software like selling loaves of bread, but that's a much more limited case and a far cry from your claim [that it's impractical to sell free software]. Selling free software is quite practical and a good way to fund development of software that otherwise wouldn't be written as free software. From my POV, if you're not selling COTS, you're really selling support and consulting services, because that's what keeps your competitors from just picking up your software and reselling it for cheaper. BTDT. This thread has revealed some staggering gulfs in concepts as held by different people. For example, I don't think it's at all germane to the definition of “sell FOO” that “your competitors can pick up the FOO and resell it cheaper”. Whether they can or not, that doesn't change that fact that one is selling FOO. Moreover, I don't try to prevent my competitors from reselling the software (so long as they don't misrepresent who holds copyright or further restrict the terms). That's part and parcel of the freedoms in the software. Indeed, I find that helps the customers trust me more and tend to come back when they want something else new; and my customers are free to show others the solutions I've already implemented. Thus is an ongoing business relationship crafted, including return customers and referrals for new work. It really is practical to sell free software. This doesn't make sense to me, but I'm willing to learn -- how do you do this in practice? Are you really selling the software, or rather selling things like setup, support, new code (or time to code), etc? ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this an ok thing to do in a class
Thanks for the feed back Vincent On Tue, May 18, 2010 at 8:50 AM, Bruno Desthuilliers bruno.42.desthuilli...@websiteburo.invalid wrote: Simon Brunning a écrit : On 18 May 2010 06:21:32 UTC+1, Vincent Davis vinc...@vincentdavis.net wrote: Just wondering if there is a problem with mixing a dictionary into a class like this. Everything seems to work as I would expect. No problem at all AFAIC. OP didn't show up on c.l.py, so too bad you snipped the relevant code snippet... -- http://mail.python.org/mailman/listinfo/python-list *Vincent Davis 720-301-3003 * vinc...@vincentdavis.net my blog http://vincentdavis.net | LinkedInhttp://www.linkedin.com/in/vincentdavis -- http://mail.python.org/mailman/listinfo/python-list
setting variables in pdb
If I am in Pdb, I would like to set a temporary variable, for example: (Pdb) r = 1 The 'r' gets interpreted as 'return' by Pdb. Is there a Pdb instruction that guarantees the intended effect, like: (Pdb) let r = 1 I can usually avoid using such variable names, but if I am changing the value of a local variable, it is convenient to be able to make sure that trying to change that variable doesn't unintentionally call a Pdb routine. Thanks, Art. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this an ok thing to do in a class
Vincent Davis wrote:
Just wondering if there is a problem with mixing a dictionary into a
class like this. Everything seems to work as I would expect.
class foo(object):
def __init__(self, x):
self.letter = dict(a=1,b=2,c=3)
self.A=self.letter['a']
self.x=self.letter[x]
afoo = foo('b')
afoo.x
2
afoo.A
1
afoo.letter['a']
1
afoo.letter.items()
[('a', 1), ('c', 3), ('b', 2)]
Do you expect afoo.letter[x] to always be afoo.x? Because they aren't:
afoo.A = 9
afoo.letter['a']
1
~Ethan~
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Re: setting variables in pdb
On 5/18/2010 4:15 PM, Art wrote: If I am in Pdb, I would like to set a temporary variable, for example: (Pdb) r = 1 The 'r' gets interpreted as 'return' by Pdb. Is there a Pdb instruction that guarantees the intended effect, like: (Pdb) let r = 1 I can usually avoid using such variable names, but if I am changing the value of a local variable, it is convenient to be able to make sure that trying to change that variable doesn't unintentionally call a Pdb routine. Try setting *two* values at the interactive prompt: foo, r = 0, 3456 Variable r now has the value 3456. HTH, John -- http://mail.python.org/mailman/listinfo/python-list
Re: setting variables in pdb
Art grenan...@gmail.com wrote: If I am in Pdb, I would like to set a temporary variable, for example: (Pdb) r = 1 The 'r' gets interpreted as 'return' by Pdb. Is there a Pdb instruction that guarantees the intended effect, like: (Pdb) let r = 1 (Pdb) exec r=1 -- http://mail.python.org/mailman/listinfo/python-list
how to cause a request for a missing class attribute cause its calculation
Lets say I have class foo(object): def __init__(self, x, y): self.x=x self.y=y def xplusy(self): self.xy = x+y inst = foo(1,2) inst.xy # no value, but I what this to cause the calculation of inst.xy I don't what to have self.xy calculated before it is called. Thanks *Vincent Davis 720-301-3003 * vinc...@vincentdavis.net my blog http://vincentdavis.net | LinkedInhttp://www.linkedin.com/in/vincentdavis -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this an ok thing to do in a class
On Tue, May 18, 2010 at 2:41 PM, Ethan Furman et...@stoneleaf.us wrote: Do you expect afoo.letter[x] to always be afoo.x? Because they aren't: afoo.A = 9 afoo.letter['a'] 1 What you are pointing out is that the assignment is not reversed . But that does make me thing of something I had not. afoo.letter['a'] = 345 afoo.A 1 Thats kinda a bummer, whats a good way to make sure affo.A gets updated? Vincent ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list *Vincent Davis 720-301-3003 * vinc...@vincentdavis.net my blog http://vincentdavis.net | LinkedInhttp://www.linkedin.com/in/vincentdavis -- http://mail.python.org/mailman/listinfo/python-list
Re: how to cause a request for a missing class attribute cause its calculation
On Tue, May 18, 2010 at 1:39 PM, Vincent Davis vinc...@vincentdavis.net wrote: Lets say I have class foo(object): def __init__(self, x, y): self.x=x self.y=y def xplusy(self): self.xy = x+y inst = foo(1,2) inst.xy # no value, but I what this to cause the calculation of inst.xy I don't what to have self.xy calculated before it is called. class Foo(object): def __init__(self, x, y): self.x = x self.y = y @property def xy(self): '''Will calculate x+y every time''' return self.x + self.y Or if Foo is immutable and you wish to cache x+y: class Foo(object): def __init__(self, x, y): self.x = x self.y = y self._xy = None @property def xy(self): if self._xy is None: self._xy = self.x + self.y return self._xy Suggested reading: http://docs.python.org/library/functions.html#property Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this an ok thing to do in a class
Vincent Davis wrote: On Tue, May 18, 2010 at 2:41 PM, Ethan Furman et...@stoneleaf.us mailto:et...@stoneleaf.us wrote: Do you expect afoo.letter[x] to always be afoo.x? Because they aren't: afoo.A = 9 afoo.letter['a'] 1 What you are pointing out is that the assignment is not reversed . But that does make me thing of something I had not. afoo.letter['a'] = 345 afoo.A 1 Thats kinda a bummer, whats a good way to make sure affo.A gets updated? It's possible, and not too tough, but... why do you need it done that way? Keeping redundant information seems like extra work with no advantage. ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
Re: how to cause a request for a missing class attribute cause its calculation
Vincent Davis wrote: Lets say I have class foo(object): def __init__(self, x, y): self.x=x self.y=y def xplusy(self): self.xy = x+y ^ this needs to be self.x + self.y inst = foo(1,2) inst.xy # no value, but I what this to cause the calculation of inst.xy I don't what to have self.xy calculated before it is called. My current favorite method: def __getattr__(self, name): if name != 'xy': raise AttributeError(%s not found % name) self.xy = self.x + self.y return self.xy ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this an ok thing to do in a class
On Tue, May 18, 2010 at 3:15 PM, Ethan Furman et...@stoneleaf.us wrote: Vincent Davis wrote: What you are pointing out is that the assignment is not reversed . But that does make me thing of something I had not. afoo.letter['a'] = 345 afoo.A 1 Thats kinda a bummer, whats a good way to make sure afoo.A gets updated? It's possible, and not too tough, but... why do you need it done that way? Keeping redundant information seems like extra work with no advantage. Not sure I do, basicly I have a long list of values that could be calculated from data. Some may take some time depending on the amount of data. I don't what to calculate them all if not needed but I don't what the user to need to know which are and which are not. But maybe @property is what I need to be looking at, see my other post on the list. Thanks Vincent ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list *Vincent Davis 720-301-3003 * vinc...@vincentdavis.net my blog http://vincentdavis.net | LinkedInhttp://www.linkedin.com/in/vincentdavis -- http://mail.python.org/mailman/listinfo/python-list
another question about classes and subclassing
Hi again all, More about classes. I am still looking into my battleship game, and I will have several different craft. All craft have common attribs (position, alive, and so on) but each craft may be a surface ship, submarine, or airplane. All three are craft, but a submarine can be submerged or not, which does not apply to a surface ship or a plane, while a plane can be airborne or not, which is not applicable to the other two. Is there any advantage to creating a craft class: class craft(): #has attribs common to any and all craft #end class then doing something like: class submarine(craft): #sub-specific attribs #end class How would I create a submarine, and then get at the craft-level attribs? Come to think of it, how would I pass anything to the craft constructor (position and alive, for example) when creating a new submarine object? Am I even doing this right to make submarine a subclass of craft? Thanks. -- Have a great day, Alex (msg sent from GMail website) mehg...@gmail.com; http://www.facebook.com/mehgcap -- http://mail.python.org/mailman/listinfo/python-list
sound effects in python
Hi, I have a sound file (e.g. .wav; .mp3, etc) in python that I'd like to modify (e.g. change tempo, pitch, add echo, amplify, etc). Any recommendation on how I can achieve this in python independent of platform? Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: how to cause a request for a missing class attribute cause its calculation
Ethan Furman wrote: Vincent Davis wrote: Lets say I have class foo(object): def __init__(self, x, y): self.x=x self.y=y def xplusy(self): self.xy = x+y ^ this needs to be self.x + self.y inst = foo(1,2) inst.xy # no value, but I what this to cause the calculation of inst.xy I don't what to have self.xy calculated before it is called. My current favorite method: def __getattr__(self, name): if name != 'xy': raise AttributeError(%s not found % name) self.xy = self.x + self.y return self.xy ~Ethan~ Chris' reply is more on-point, I think -- I was thinking of attributes that are only calculated once. *sigh* ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
Re: sound effects in python
There was a talk at pycon about this. Sounded interecting but I don't know much about it. http://us.pycon.org/2010/conference/schedule/event/136/ Vincent On Tue, May 18, 2010 at 4:05 PM, Astan Chee astan.c...@al.com.au wrote: Hi, I have a sound file (e.g. .wav; .mp3, etc) in python that I'd like to modify (e.g. change tempo, pitch, add echo, amplify, etc). Any recommendation on how I can achieve this in python independent of platform? Thanks -- http://mail.python.org/mailman/listinfo/python-list *Vincent Davis 720-301-3003 * vinc...@vincentdavis.net my blog http://vincentdavis.net | LinkedInhttp://www.linkedin.com/in/vincentdavis -- http://mail.python.org/mailman/listinfo/python-list
Re: Access to comp.lang.python
On 05/15/2010 05:34 PM, cjw wrote: It seems that messages are coming from a number of sources, such as gmane and google groups. The problem is that many messages seem to get unlinked from their threads. I use Thunderbird 3.0.5 and wonder whether the problem lies with the merge process, the server or my reader. While others have told you about using gmane or other sources (direct email, etc), I haven't seen anything fly by regarding the unlinked from their threads portion of your question. Thunderbird 2.0 - 3.0 changed the default value for mail.strict_threading from False to True. Pulling up the config editor (essentially the about:config, buried in the options-advanced stuff, I think; or perhaps I have the about:config plugin to do that) allows you to toggle this value back to True. This setting controls whether threads are defined *only* by the mail header (strict=True), or whether TB also tries to guess based on the Subject header (strict=False). Toggle it (and perhaps restart TB?) and see if that helps rectify the threading. There are a lot of folks here on c.l.p that use broken newsreaders that don't correctly set news/threading headers. -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: sound effects in python
On 19 Mai, 00:05, Astan Chee astan.c...@al.com.au wrote: Hi, I have a sound file (e.g. .wav; .mp3, etc) in python that I'd like to modify (e.g. change tempo, pitch, add echo, amplify, etc). Any recommendation on how I can achieve this in python independent of platform? Thanks You could have a look on PyAudio : http://people.csail.mit.edu/hubert/pyaudio/ I have not any experience with it, so I can only point you to it for now. Hope you find it useful technocake -- http://mail.python.org/mailman/listinfo/python-list
Re: another question about classes and subclassing
Alex Hall wrote: Hi again all, More about classes. I am still looking into my battleship game, and I will have several different craft. All craft have common attribs (position, alive, and so on) but each craft may be a surface ship, submarine, or airplane. All three are craft, but a submarine can be submerged or not, which does not apply to a surface ship or a plane, while a plane can be airborne or not, which is not applicable to the other two. Is there any advantage to creating a craft class: class craft(): #has attribs common to any and all craft #end class then doing something like: class submarine(craft): #sub-specific attribs #end class How would I create a submarine, and then get at the craft-level attribs? Come to think of it, how would I pass anything to the craft constructor (position and alive, for example) when creating a new submarine object? Am I even doing this right to make submarine a subclass of craft? Thanks. Inside the __init__() method of Submarine, simply call the __init__() method of Craft, with appropriate parameters. As for getting at the attributes of the Craft parent class, from a Submarine object, you simply reference the attributes as always. If they're not overridden in Submarine, they'll be searched for in Craft. DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: another question about classes and subclassing
Okay, that makes sense. So by calling submarine(craft) I am bringing in all of craft's attribs (subclassing)? Or does calling craft's __init__ method do that instead? Is there an advantage to doing it this way, rather than just making separate classes for everything, except for my own sense of organization; speed, memory usage, less coding? Thanks. On 5/18/10, Dave Angel da...@ieee.org wrote: Alex Hall wrote: Hi again all, More about classes. I am still looking into my battleship game, and I will have several different craft. All craft have common attribs (position, alive, and so on) but each craft may be a surface ship, submarine, or airplane. All three are craft, but a submarine can be submerged or not, which does not apply to a surface ship or a plane, while a plane can be airborne or not, which is not applicable to the other two. Is there any advantage to creating a craft class: class craft(): #has attribs common to any and all craft #end class then doing something like: class submarine(craft): #sub-specific attribs #end class How would I create a submarine, and then get at the craft-level attribs? Come to think of it, how would I pass anything to the craft constructor (position and alive, for example) when creating a new submarine object? Am I even doing this right to make submarine a subclass of craft? Thanks. Inside the __init__() method of Submarine, simply call the __init__() method of Craft, with appropriate parameters. As for getting at the attributes of the Craft parent class, from a Submarine object, you simply reference the attributes as always. If they're not overridden in Submarine, they'll be searched for in Craft. DaveA -- Have a great day, Alex (msg sent from GMail website) mehg...@gmail.com; http://www.facebook.com/mehgcap -- http://mail.python.org/mailman/listinfo/python-list
Re: upgrade python
In article mailman.367.1274206734.32709.python-l...@python.org, packet fasteliteprogram...@gmail.com wrote: Would it be safe to upgrade from python 2.6.4 to 2.6.5 without hurting the 2.6.4? Define hurting. Generally speaking, it's always safe to upgrade a point release, but you should replace the previous version. -- Aahz (a...@pythoncraft.com) * http://www.pythoncraft.com/ f u cn rd ths, u cn gt a gd jb n nx prgrmmng. -- http://mail.python.org/mailman/listinfo/python-list
Re: another question about classes and subclassing
Alex Hall wrote: Okay, that makes sense. So by calling submarine(craft) I am bringing in all of craft's attribs (subclassing)? Or does calling craft's __init__ method do that instead? Is there an advantage to doing it this way, rather than just making separate classes for everything, except for my own sense of organization; speed, memory usage, less coding? Thanks. snip You put your response at the wrong end of the message. It should *follow* whatever you're quoting. So in your case, I'm forced to delete everything just to make the order correct. You don't call Submarine(Craft), as it's not a function. That's a class definition. You instantiate a Submarine by something like: sub = Submarine(arg1, arg2, arg3) And those three arguments are then passed to the __init__() method of Submarine. It may choose to call the __init__() method of Craft, in the method. There are lots of advantages of using inheritance. First, any common code only has to be entered once, so you'll only have to fix it once when you find mistakes, or decide to redesign. Second, it's easier to read - very important. It may take less memory, but probably not. And it's not likely to have any speed impact. Craft instances don't have any instance data attributes if nobody assigns them. And that's normally the job of __init__(). So naturally, you need to call it from the Submarine class. Incidentally, convention is to capitalize class names. DaveA -- http://mail.python.org/mailman/listinfo/python-list
Pointers on packaging python programs for installation on multiple platforms?
Hi all I am trying to release my first python program. I would like to be able to create a download which will automatically do stuff like add menu items (eg for KDE, GNOME and Windows). Is there anywhere which explains how to do this? Thanks in advance Brendan -- http://mail.python.org/mailman/listinfo/python-list
Re: another question about classes and subclassing
On 5/18/10, Dave Angel da...@ieee.org wrote: Alex Hall wrote: Okay, that makes sense. So by calling submarine(craft) I am bringing in all of craft's attribs (subclassing)? Or does calling craft's __init__ method do that instead? Is there an advantage to doing it this way, rather than just making separate classes for everything, except for my own sense of organization; speed, memory usage, less coding? Thanks. snip You put your response at the wrong end of the message. It should *follow* whatever you're quoting. So in your case, I'm forced to delete everything just to make the order correct. Sorry, top-posting is a habit on some other lists I am on, and sometimes it follows me to lists where in-line posting is the way to do it. You don't call Submarine(Craft), as it's not a function. That's a class definition. You instantiate a Submarine by something like: sub = Submarine(arg1, arg2, arg3) And those three arguments are then passed to the __init__() method of Submarine. It may choose to call the __init__() method of Craft, in the method. So that is the only way of making submarine inherit craft, by calling craft's __init__ inside submarine's __init__. Okay, I think I get it. There are lots of advantages of using inheritance. First, any common code only has to be entered once, so you'll only have to fix it once when you find mistakes, or decide to redesign. Very true. Second, it's easier to read - very important. It may take less memory, but probably not. And it's not likely to have any speed impact. Craft instances don't have any instance data attributes if nobody assigns them. And that's normally the job of __init__(). So naturally, you need to call it from the Submarine class. Right, I think I have it now... At least I hope I do! Incidentally, convention is to capitalize class names. Yes, I had planned on doing that in my project, but I got caught up in just making it work and forgot to do so. Thanks for the reminder. DaveA -- Have a great day, Alex (msg sent from GMail website) mehg...@gmail.com; http://www.facebook.com/mehgcap -- http://mail.python.org/mailman/listinfo/python-list
Re: Access to comp.lang.python
On 5/18/2010 7:27 PM, Tim Chase wrote: On 05/15/2010 05:34 PM, cjw wrote: It seems that messages are coming from a number of sources, such as gmane and google groups. The problem is that many messages seem to get unlinked from their threads. I use Thunderbird 3.0.5 and wonder whether the problem lies with the merge process, the server or my reader. While others have told you about using gmane or other sources (direct email, etc), I haven't seen anything fly by regarding the unlinked from their threads portion of your question. Thunderbird 2.0 - 3.0 changed the default value for mail.strict_threading from False to True. Pulling up the config editor (essentially the about:config, buried in the options-advanced stuff, I think; or perhaps I have the about:config plugin to do that) allows you to toggle this value back to True. This setting controls whether threads are defined *only* by the mail header (strict=True), or whether TB also tries to guess based on the Subject header (strict=False). I solved the problem for me, well enough, by sorting threads by subject instead of 'Date' (actually, time) so that disconnect threads sort together anyway. -- http://mail.python.org/mailman/listinfo/python-list
Re: recall function definition from shell
On 5/18/2010 2:55 PM, superpollo wrote: yes python does not, but maybe the *shell* does, or so i thought. i just wanted to dump the code for the function in a file, after i tested in the shell... On Windows, you can tell the shell (command window) how many lines to remember. One can sensibly make this a lot higher on a gigabyte machine than back in the 640K days. No idea about other systems. -- http://mail.python.org/mailman/listinfo/python-list
Re: upgrade python
On 5/18/2010 9:47 PM, Aahz wrote: In articlemailman.367.1274206734.32709.python-l...@python.org, packetfasteliteprogram...@gmail.com wrote: Would it be safe to upgrade from python 2.6.4 to 2.6.5 without hurting the 2.6.4? Define hurting. Generally speaking, it's always safe to upgrade a point release, but you should replace the previous version. The default action on windows is replace. I keep the previous installer around with the current one fora while in case a bugfix release has a problem and I need to revert. -- http://mail.python.org/mailman/listinfo/python-list
Re: Picking a license
This thread is already off-topic and too long. I'm conflicted about my role in that; I have endeavoured only to address falsehoods that IMO were not otherwise being addressed. So I'll try to keep this brief. Ethan Furman et...@stoneleaf.us writes: This doesn't make sense to me, but I'm willing to learn -- how do you do this in practice? Are you really selling the software Perhaps in private email we can discuss what you mean by “really selling the software”; it's too off-topic here. By my understanding of that term, yes, I am selling software. or rather selling things like setup, support, new code (or time to code), etc? All of the above, depending on the project. -- \ “If you don't know what your program is supposed to do, you'd | `\ better not start writing it.” —Edsger W. Dijkstra | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: help need to write a python spell checker
On Fri, 14 May 2010 18:19, harry k wrote in comp.lang.python mailman.205.1273907726.32709.python-l...@python.org: Write a spell checking tool that will identify all misspelled word in a text file using a provided dictionary. snip/ Extend the spell-checking tool so that the program will also print out a list of possible correct spellings for the words. I'm happy to do you homework for you, cost is us$1000 per hour. Email to your professor automatically on receipt. -- http://mail.python.org/mailman/listinfo/python-list
Re: help need to write a python spell checker
On Wed, 19 May 2010 13:01:10 +1000, Nigel Rowe wrote: I'm happy to do you homework for you, cost is us$1000 per hour. Email to your professor automatically on receipt. I'll do it for $700 an hour! -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Classes and threading
I thought I knew how classes worked, but this code sample is making my
second guess myself:
import threading
class nThread(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
def run(self,args):
print self.name
print self.args
pants = nThread(args=('fruit'),name='charlie')
pants.start()
Traceback (most recent call last):
File C:\Users\Adam\Desktop\PyTiVo\task_master.py, line 13, in
module
pants = nThread(args=('fruit'),name='charlie')
TypeError: __init__() got an unexpected keyword argument 'args'
Shouldn't __init__ still handle these (as per
http://docs.python.org/library/threading.html#thread-objects ), even
if its subclassed? I thought this was the whole idea of inheritance
and overdriving.
And sort of related, why does this crash IDLE GUI but not the command
line?:
import threading
class nThread(threading.Thread):
def run(self):
print 2+2
pants = nThread()
pants.start()
--
http://mail.python.org/mailman/listinfo/python-list
question on logging module
Hi,
From the python 2.6.4 tutorial, refer to
http://docs.python.org/release/2.6.4/tutorial/stdlib2.html#logging
The above example doesn't work for me.
Here is script log
#
o...@oem-desktop ~ $ python -V
Python 2.6.4
o...@oem-desktop ~ $ python
Python 2.6.4 (r264:75706, Dec 7 2009, 18:45:15)
[GCC 4.4.1] on linux2
Type help, copyright, credits or license for more information.
import logging
logging.debug('debug information')
Traceback (most recent call last):
File stdin, line 1, in module
AttributeError: 'module' object has no attribute 'debug'
I am current using python2.6.4.
Can anyone point out what's problem?
Thanks,
--
http://mail.python.org/mailman/listinfo/python-list
Re: Classes and threading
Adam W. wrote:
I thought I knew how classes worked, but this code sample is making my
second guess myself:
import threading
class nThread(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
def run(self,args):
print self.name
print self.args
pants = nThread(args=('fruit'),name='charlie')
pants.start()
Traceback (most recent call last):
File C:\Users\Adam\Desktop\PyTiVo\task_master.py, line 13, in
module
pants = nThread(args=('fruit'),name='charlie')
TypeError: __init__() got an unexpected keyword argument 'args'
Shouldn't __init__ still handle these (as per
http://docs.python.org/library/threading.html#thread-objects ), even
if its subclassed? I thought this was the whole idea of inheritance
and overdriving.
You've overridden the __init__ method to _not_ take any arguments, and
explicitly call its parent constructor not passing anything. So it
shouldn't be a wonder that it won't accept any arguments.
If you don't intend to override the constructor in the parent class,
simply don't define it.
--
Erik Max Francis m...@alcyone.com http://www.alcyone.com/max/
San Jose, CA, USA 37 18 N 121 57 W AIM/Y!M/Skype erikmaxfrancis
I like young girls. Their stories are shorter.
-- Thomas McGuane
--
http://mail.python.org/mailman/listinfo/python-list
Re: help need to write a python spell checker
On May 14, 3:19 am, harry k hkiri...@yahoo.com.au wrote: Write a spell checking tool that will identify all misspelled word in a text file using a provided dictionary. Well, this has been educational. Both my daughters just finished their final exams last week, so I was confused about seeing the homework assignment. Then I saw the email address. Although it makes perfect sense, I never really thought much about the possibility that the school year would be upside down down under... Regards, Pat -- http://mail.python.org/mailman/listinfo/python-list
