PKCS7 padding implementation in Python
Hi,Do any of the cryptographic modules for Python support PKCS7 padding scheme? I would like to use this scheme with block cipher encryption algorithms to pad text whose length is less than a proper block size. thanks in advance,Satchit -- http://mail.python.org/mailman/listinfo/python-list
WS-Security support for Python SOAP libraries
Hi, Do any of the existing SOAP libraries for Python have support for WS-Security? thanks, Satchit -- http://mail.python.org/mailman/listinfo/python-list
creating single-instance executables using python/py2exe
Hi, I have created an application using python/wxPython and py2exe. I have associated a certain file extension with this application so that when I double-click the file, my application is launched. The application runs fine except that a new instance is created when I double click on two different files. Is there a way in which I can make sure only one instance is created? Any additional files are opened in the same running instance? Would appreciate any comments/feedback. thanks, Satchit -- Satchidanand Haridas (sharidas at zeomega dot com) ZeOmega (www.zeomega.com) Open Minds' Open Solutions -- http://mail.python.org/mailman/listinfo/python-list
Re: best Pythonic way to do this sort: Python newb
Satchidanand Haridas (sharidas at zeomega dot com) ZeOmega (www.zeomega.com) Open Minds' Open Solutions Sean Berry wrote: Paul Rubin http://[EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Sean Berry [EMAIL PROTECTED] writes: myList = [[value1, value2, value3],[value1, value2, value3], ...] I have a function which takes value3 from the lists above and returns another value. I want to use this returned value to sort the lists. So, my resultant list would be ordered by the return value of the function with value3 as its argument. From a relative Python newb, what is the best way to do this? def get_key(x): return x[2] sorted_list = sorted(myList, key=get_key) Sorry if I am missing something. But. what is sorted here? My simplified function looks like this def myFunction( myNumber ): do some math calculations to myNumber return result of calculations So, I want to sort myList by the return of myFunction( value3 ) I tried doing the following... with no luck so far myList.sort(lambda x, y: cmp(myFunction(x[2]), myFunction(y[2])) I think the above statement should be as follows: myList.sort(lambda x, y: cmp(myFunction(x[2]) - myFunction(y[2])) hope that helps. regards, Satchit -- http://mail.python.org/mailman/listinfo/python-list
Re: Confused with module and .py files
Iyer, Prasad C wrote: Actually I am bit confused between the modules and .py file How do I differentiate between the 2. A module 'name' is the same as the name of your file without the '.py' extension. For example I have a file import1.py, import2.py file Which has few functions and classes And if I have a class with same name BaseClass in both the file How would I use it if I declare it as given below in my 3rd class from import1.py import * from import2.py import * You should say : from import1 import * from import2 import * If according to your earlier question, you have a class with the same name in two different modules, the better thing then (as others on the list have already pointed out) is to do the following: import import1, import2 c1 = import1.MyClass() c2 = import2.MyClass() regards, Satchit Satchidanand Haridas (sharidas at zeomega dot com) ZeOmega (www.zeomega.com) Open Minds' Open Solutions regards prasad chandrasekaran --- Cancer cures smoking #-Original Message- #From: [EMAIL PROTECTED] #[mailto:[EMAIL PROTECTED] On #Behalf Of [EMAIL PROTECTED] #Sent: Wednesday, October 05, 2005 1:32 PM #To: python-list@python.org #Subject: Python-list Digest, Vol 25, Issue 65 # #Send Python-list mailing list submissions to # python-list@python.org # #To subscribe or unsubscribe via the World Wide Web, visit # http://mail.python.org/mailman/listinfo/python-list #or, via email, send a message with subject or body 'help' to # [EMAIL PROTECTED] # #You can reach the person managing the list at # [EMAIL PROTECTED] # #When replying, please edit your Subject line so it is more specific #than Re: Contents of Python-list digest... This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message. -- http://mail.python.org/mailman/listinfo/python-list
Re: Quick help needed: how to format an integer ?
One possible solution. Don't know how efficient it is though. :-) def put_decimal(s): ... return ''.join( [ [s[i], '.%s' % s[i]][(len(s)-i)%3 == 0] for i in range(0, len(s))]) ... put_decimal(10001234) '10.001.234' put_decimal(12622) '12.622' thanks, Satchit [EMAIL PROTECTED] wrote: Hi ! I need to convert some integer values. 1622 -1 622 or 10001234 - 10.001.234 So I need thousand separators. Can anyone helps me with a simply solution (like %xxx) ? Thanx for it: dd Ps: Now I use this proc: def toths(i): s=str(i) l=[] ls=len(s) for i in range(ls): c=s[ls-i-1] if i%3==0 and i0: c=c+. l.append(c) l.reverse() return .join(l) -- http://mail.python.org/mailman/listinfo/python-list
Re: Removing dictionary-keys not in a set?
Hi,
I am not sure if this way is a good one, but it certainly is consise.
Also sometimes, it's better to go for a simple approach than the consise
one (for readability). With the abive disclaimer, I present my solution:
d1 = {1 : 2, 3 : 4, 5 : 6, 7 : 8, 9 : 10 }
s1 = [ 1, 5, 7 ]
# assuming you are using python 2.3.5
import sets
d2 = dict( [ ( x, d1[ x ] ) for x in sets.Set( d1.keys() ).
intersection( sets.Set( s1 ) ) ] )
thanks,
Satchit
Tim N. van der Leeuw wrote:
Hi,
I'd like to remove keys from a dictionary, which are not found in a
specific set. So it's kind of an intersection-operation.
I can create a new dictionary, or a loop over all keys and test them
for set-membership, but I was wondering if there was a smart way to
express this in 1 or 2 concise statements that I'm not aware of.
So are there smarter ways to get the intersection of dictionary and set
into a dictionary than the following pseudo-code:
# Variation 1
d2 = {}
for key in s: d2[key] = d1[key]
# Variation 2
for key in d.iterkeys(): if key not in s: del d[key]
And if there's no smarter way, then which of these two options would
give best performance?
Cheers,
--Tim
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Re: A ClientForm Question
Hi, ClientForm and Mechanize like tools do not execute javascript . You will normally have to do them manually in your python code itself. In your case, if you have a button, which (and I assume) executes some javascript code that sets some hidden variable and/or changes the 'action' attribute of the form, you will have to change/assign those elements in your python code itself. ClientForm and mechanize can get tedious to use when one has a lot of JavaScript functionality in the form. Hope this answered your question... :-) regards, Satchit narke wrote: John J. Lee wrote, See second bullet point under Why does .click()ing on a button not work for me?. Thanks for you advice. However, after read through the FAQs, I have not managed to find a solution for my problem. I belive my button is coupled with some Java script which mess thing up and there is no a easy solution. Am I right? - narke -- http://mail.python.org/mailman/listinfo/python-list
Re: dictionary: sorting the values preserving the order
Rakesh wrote:
Hi,
For a particular problem of mine, I want to sort key, value pairs
by its value.
Eg:
Input:
A, 4
B, 5
C, 1
D, 2
E, 3
I would like the output to be:
C
D
E
A
B
the following code does that:
d1 = {'a':4,'b':5,'c':1,'d':2,'e':3}
i1 = [ (d1[i], i) for i in d1.keys() ]
i1.sort()
i1
[(1, 'c'), (2, 'd'), (3, 'e'), (4, 'a'), (5, 'b')]
for each in i1:
... print each[1]
c
d
e
a
b
thanks,
Satchit
i.e. I would like to get the keys in the sorted order of values.
I did google around a little bit. One solution to a similar problem
suggested is:
# Courtesy:
http://aspn.activestate.com/ASPN/Python/Cookbook/Recipe/52306
def sortedDictValues3(adict):
keys = adict.keys()
keys.sort()
return map(adict.get, keys)
This gets a list sorted by the keys. How would I get a revised
dictionary
sorted by its values.
--
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Re: tree data structure
Hi,
You could use Python dictionaries as trees. Example:
to represent a simple tree:
'a' - ( 'b' , 'c' )
'b' - ( 'd', 'e', 'f')
'e' - ( 'g')
'f' - ('h', 'i', 'j')
treeD = { 'a' : (
{ 'b' : (
'd',
{ 'e' : 'f' },
{f : ( 'h', 'i', 'j' )}
)
},
'c'
)
}
hope this helps.
regards,
Satchit
Satchidanand Haridas (sharidas at zeomega dot com)
ZeOmega (www.zeomega.com)
Open Minds' Open Solutions
#20,Rajalakshmi Plaza,
South End Road,
Basavanagudi,
Bangalore-560 004, India
vivek khurana wrote:
Hi! all
i am a new member on this list. I have to implement
tree data structure using python. How it can be done
in python. Is there an existing data structure which
can be used as tree? I have searched archives and
manuals but no luck.
Regards
VK
Hug the REALITY ;-)
Disclaimer
The facts expressed here belong to everybody, the opinions to me. The
distinction is yours to draw...
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Re: renaming 'references' to functions can give recursive problems
peter wrote: Hello, nice solution: but it puzzles me :) can anyone tell me why ---correct solution def fA(input): return input def newFA(input, f= fA): return f(input) fA = newFA is correct and: def fA(input): ... print inside fA ... return input ... def newFA(input,f=fA): ... print inside newFA ... return f(input) ... fA = newFA fA(2) inside newFA inside fA 2 while: -infinite loop- def fA(input): return input def newFA(input): return fA(input) fA = newFA gives an infinite recursive loop? def fA(input): ... print inside fA ... return input ... def newFA(input): ... print inside newFA ... return fA(input) ... fA = newFA fA(2) inside newFA inside newFA inside newFA inside newFA What is happening is that when you call fA (inside newFA) in the second case, you are calling newFA because fA is pointing to newFA (hope that made sense ;-)). So it was recursive. While in the former case you called f, which pointed to fA, but not to newFA. Probably the following will make it clearer: def fA(input): ... print inside fA ... return input ... def newFA(input,f=fA): ... print inside newFA ... print f is pointing to: ,f ... return f(input) ... fA = newFA fA(2) inside newFA f is pointing to: function fA at 0x43123374 inside fA 2 fA function newFA at 0x43194064 newFA function newFA at 0x43194064 Thus f and fA do not point to the same function object when you execute the statement fa(2). This f is called once and terminates. thanks, Satchit -- http://mail.python.org/mailman/listinfo/python-list
implementing singleton class at the module level
Hi, I was looking at ways to implement a Singleton class. I saw some methods described on the PythonSingleton wiki (http://c2.com/cgi/wiki?PythonSingleton). I implemented the following. code module: A.py -- class Singleton: def __init__(self): #do something singleton_instance = Singleton() Then in any other module (eg B.py): from A import singleton_instance /code singleton_instance will be created only once and can be reused in other modules. But is this ok? I am trying to figure out what are the disadvantages of using the above method. I would appreciate any comments. thanks. regards, Satchit -- http://mail.python.org/mailman/listinfo/python-list
Re: EDI x12 -- XML
Hi, In case you weren't aware of the pyx12 project on sourceforge. The project summary on sourceforge.net (http://sourceforge.net/projects/pyx12/) says the following and I quote: pyx12 is a python based ANSI X.12 to XML EDI translator and validator. It is designed to be a step in the conversion of a X12 transaction to back-end database process. It can convert to and from an XML representation of the X12 document. fyi. thanks, Satchit Satchidanand Haridas (sharidas at zeomega dot com) ZeOmega (www.zeomega.com) Open Minds' Open Solutions #20,Rajalakshmi Plaza, South End Road, Basavanagudi, Bangalore-560 004, India Greg Lindstrom wrote: Hello, List- I am working on automating a system accepting input data in EDI x12 format and would like to convert it to XML. Before I start, I thought I'd ask if anyone has worked on such a beast. I have seen work by Chris Cioffi on parsing EDI records. Is anything else out there before I either write one or use one that I have written in Perl? Thanks! --greg-- Greg Lindstrom 501 975.4859 Computer Programmer [EMAIL PROTECTED] NovaSys Health Little Rock, Arkansas We are the music makers, and we are the dreamers of dreams. W.W. -- http://mail.python.org/mailman/listinfo/python-list
Re: Please suggest on the book to follow
Hi, Probably the best resources for learning Python are available online. Here are a few sites that you might find helpful: 1. http://byteofpython.info/ 2. http://www.diveintopython.org/ -- Writted by Mark Pilgrim, covers many advanced material. The site says /Dive into Python/ is a Python book for experienced programmers. 3. http://gnosis.cx/TPiP/ -- Site for Text Processing in Python, a book by David mertz. You will find many other very good Python related material on his website. regards, Satchit Satchidanand Haridas (sharidas at zeomega dot com) ZeOmega (www.zeomega.com) Open Minds' Open Solutions #20,Rajalakshmi Plaza, South End Road, Basavanagudi, Bangalore-560 004, India santanu wrote: Hi all, I know a little python (not the OOP part) learnt by studying the online tutorial. Now I would like to learn it more thoroughly. I have access to 'Programming Python' which I liked (on flipping through the pages), but the problem is it deals only with version 2.0 of Phython. So, I would be glad if you could suggest me whether it would be really a good idea to learn from this book. In other words, will I have to unlearn too much after I complete this book (by the time I am done with this book, I believe we will be having Python 2.6 or so). Please suggest. Regards, Santanu -- http://mail.python.org/mailman/listinfo/python-list
Re: DevX: Processing EDI Documents into XML with Python
There has already been some work in this area - although for X12 transactions for the healthcare industry. Its on sourceforge already and best of all the development language is Python: http://sourceforge.net/projects/pyx12/ thanks, Satchit Satchidanand Haridas (sharidas at zeomega dot com) ZeOmega (www.zeomega.com) Open Minds' Open Solutions #20,Rajalakshmi Plaza, South End Road, Basavanagudi, Bangalore-560 004, India Jeremy Jones wrote: Claudio Grondi wrote: You don't have to rely on expensive and proprietary EDI conversion software to parse, validate, and translate EDI X12 data to and from XML; you can build your own translator with any modern programming language, such as Python. by Jeremy Jones http://www.devx.com/enterprise/Article/26854 Excerpt: Python is an object-oriented, byte-compiled language with a clean syntax, clear and consistent philosophy, and a strong user community. These attributes (both of the language and the community) make it possible to quickly write working, maintainable code, which in turn makes Python an excellent choice for nearly any programming task. Processing any flavor of EDI is no exception. Hi, just wanted to share with you, that the last issue of the DevX newsletter comes with a Python related article as first item in the list of subjects. Claudio Anyone interested in processing EDI with Python will probably be interested in giving it a read. Please feel free to scrutinize the code mercilessly. I plan on creating a project on Sourceforge with the code that is attached to that article (and hopefully with modifications coming from user input in the ensuing months). Comments are greatly appreciated. Thanks for posting this, Claudio. Jeremy Jones -- http://mail.python.org/mailman/listinfo/python-list
Re: How can I get the names of the files in a directory?
Hi, try the 'listdir' function in the 'os' module. Also check the 'walk' function. regards, Satchit Satchidanand Haridas (sharidas at zeomega dot com) ZeOmega (www.zeomega.com) Open Minds' Open Solutions #20,Rajalakshmi Plaza, South End Road, Basavanagudi, Bangalore-560 004, India Sara Fwd wrote: Can you guys also help me find a module that looks in a directory and print out the names of the files in there? __ Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. http://promotions.yahoo.com/new_mail -- http://mail.python.org/mailman/listinfo/python-list
