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• IP address of client in Python SimpleXMLRPCServer ?

  - by Joseph Turian

  I have a SimpleXMLRPCServer server (Python). How can I get the IP address of the client in the request handler? This information appears in the log. However, I am not sure how to access this information from within the request handler.

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• Python module for converting PDF to text

  - by cnu

  Is there any python module to convert PDF files into text? I tried one piece of code found in Activestate which uses pypdf but the text generated had no space between and was of no use.

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• All possible permutations of a set of lists in Python

  - by Ian Davis

  In Python I have a list of n lists, each with a variable number of elements. How can I create a single list containing all the possible permutations: For example [ [ a, b, c], [d], [e, f] ] I want [ [a, d, e] , [a, d, f], [b, d, e], [b, d, f], [c, d, e], [c, d, f] ] Note I don't know n in advance. I thought itertools.product would be the right approach but it requires me to know the number of arguments in advance

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• python webtest port configuration?

  - by MattM

  I am attempting to write some tests using webtest to test out my python GAE application. The problem I am running into is that the application is listening on port 8080 but I cannot configure webtest to hit that port. For example, I want to use app.get('/getreport') to hit http://localhost:8080/getreport. Obviously, it hits just thits http:// localhost/getreport. Is there a way to set up webtest to hit a particular port?

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• Why is "while" loop really needed in Python?

  - by Tomaž Pisanski

  I was told that 95% of all loops in Python are "for" loops. Since "while" loops are clearly more "dangerous" than "for" loops, I would like to know if there are situations in which the use of a "while" loop is essential. For teaching purposes it would be useful to know if there is a systematic way of transforming "while" loops into "for" loops.

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• Memory efficient int-int dict in Python

  - by Bolo

  Hi, I need a memory efficient int-int dict in Python that would support the following operations in O(log n) time: d[k] = v # replace if present v = d[k] # None or a negative number if not present I need to hold ~250M pairs, so it really has to be tight. Do you happen to know a suitable implementation (Python 2.7)? EDIT Removed impossible requirement and other nonsense. Thanks, Craig and Kylotan! To rephrase. Here's a trivial int-int dictionary with 1M pairs: >>> import random, sys >>> from guppy import hpy >>> h = hpy() >>> h.setrelheap() >>> d = {} >>> for _ in xrange(1000000): ... d[random.randint(0, sys.maxint)] = random.randint(0, sys.maxint) ... >>> h.heap() Partition of a set of 1999530 objects. Total size = 49161112 bytes. Index Count % Size % Cumulative % Kind (class / dict of class) 0 1 0 25165960 51 25165960 51 dict (no owner) 1 1999521 100 23994252 49 49160212 100 int On average, a pair of integers uses 49 bytes. Here's an array of 2M integers: >>> import array, random, sys >>> from guppy import hpy >>> h = hpy() >>> h.setrelheap() >>> a = array.array('i') >>> for _ in xrange(2000000): ... a.append(random.randint(0, sys.maxint)) ... >>> h.heap() Partition of a set of 14 objects. Total size = 8001108 bytes. Index Count % Size % Cumulative % Kind (class / dict of class) 0 1 7 8000028 100 8000028 100 array.array On average, a pair of integers uses 8 bytes. I accept that 8 bytes/pair in a dictionary is rather hard to achieve in general. Rephrased question: is there a memory-efficient implementation of int-int dictionary that uses considerably less than 49 bytes/pair?

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• Equivalent of python eval in Haskell

  - by TheMachineCharmer

  There is function in python called eval that takes string input and evaluates it. >>> x = 1 >>> print eval('x+1') 2 >>> print eval('12 + 32') 44 >>> What is Haskell equivalent of eval function?

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• Multi-linear regression using NumPy in Python?

  - by celenius

  Is it possible to perform multi-linear regression in Python using NumPy? The documentation here suggests that it is, but I cannot find any more details on the topic.

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• Python XMLRPC with concurrent requests

  - by MattB

  I'm looking for a way to prevent multiple hosts from issuing simultaneous commands to a Python XMLRPC listener. The listener is responsible for running scripts to perform tasks on that system that would fail if multiple users tried to issue these commands at the same time. Is there a way I can block all incoming requests until the single instance has completed?

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• python programme.

  - by siva

  hi, i am siva this is frist time taken the python programming language i have a small problem please help me the question is **Write two functions, called countSubStringMatch and countSubStringMatchRecursive that take two arguments, a key string and a target string. These functions iteratively and recursively count the number of instances of the key in the target string. You should complete definitions for def countSubStringMatch(target,key): and def countSubStringMatchRecursive (target, key): **

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• How to write a Python lexical analyser?

  - by dish

  I'm trying to write a C module to lexically analyse Python code. How can I do it?

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• R or Python for file manipulation

  - by danspants

  I have 4 reasonably complex r scripts that are used to manipulate csv and xml files. These were created by another department where they work exclusively in r. My understanding is that while r is very fast when dealing with data, it's not really optimised for file manipulation. Can I expect to get significant speed increases by converting these scripts to python? Or is this something of a waste of time?

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• Setting timeouts to parse webpages using python lxml

  - by Saurabh

  I am using python lxml library to parse html pages: import lxml.html # this might run indefinitely page = lxml.html.parse('http://stackoverflow.com/') Is there any way to set timeout for parsing?

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• Python: what package contains the installation metadata?

  - by Mark Harrison

  e.g., how can I find out that the executable has been installed in "/usr/bin/python" and the library files in "/usr/lib/python2.6"?

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• Using an index to get an item, Python

  - by anteater7171

  I have a list in python ('A','B','C','D','E'), how do I get which item is under a particular index number? Example: Say it was given 0, it would return A. Given 2, it would return C. Given 4, it would return E.

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• Programmatically setting an attribute in Python?

  - by Nick

  Suppose I have a python object x and a string s, how do I set the attribute s on x? So: >>> x = SomeObject() >>> attr = 'myAttr' >>> # magic goes here >>> x.myAttr 'magic' What's the magic? The goal of this, incidentally, is to cache calls to x.__getattr__().

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• Gnuplot python with 2 list

  - by devil night

  I've a python script that gives me 2 lists and another who is the reference(the time). How can I create a graphic with the representation of my first list by the time. And same question for the second list. I need them on the same graphic. list1 [12, 15, 17, 19] list2 [34, 78, 54, 67] list3 [10, 20, 30, 40] (time in minutes) How can I create a graphic in png format with these lists? Thanks

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• Break the nested(double) loop in python

  - by prosseek

  I use the following method to break the double loop in Python. for word1 in buf1: find = False for word2 in buf2: ... if res == res1: print "BINGO " + word1 + ":" + word2 find = True if find: break Is there better way to break the double loop?

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• Is there any free Python to C translator?

  - by Ole Jak

  Is there any free Python to C translator? for example capable to translate such lib as lib for Fast content-aware image resizing (which already depends on some C libs) to C classes and files?

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• python popen command.....wait until the command is finished

  - by michele

  Hi, I have a script where I launch with popen a shell command. The problem is that the script don't wait that popen command is finished and go forward. om_points = os.popen(command, "w") ..... How can I tell to my python script to wait until the shell command has finished? Thanks.

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• Financial Charts / Graphs in Ruby or Python

  - by Eric the Red

  What are my best options for creating a financial open-high-low-close (OHLC) chart in a high level language like Ruby or Python? While there seem to be a lot of options for graphing, I haven't seen any gems or eggs with this kind of chart. http://en.wikipedia.org/wiki/Open-high-low-close_chart (but I don't need the moving average or Bollinger bands) JFreeChart can do this in Java, but I'd like to make my codebase as small and simple as possible. Thanks!

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• Have to find if some window name has some string on it with python

  - by Shady

  First of all, I get the name of the current window win32gui.GetWindowText(win32gui.GetForegroundWindow()) k, no problem with that... But now, how can I make an if with the result for having an specific string on it... For example, the result gave me C:/Python26/ How can I make an True of False for the result containing the word, 'python' ? I'm trying with re.search, but I'm not being able to make it do it

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• mkdir -p functionality in python

  - by SetJmp

  Is there a way to get functionality similar to mkdir -p on the shell... from within python. I am looking for a solution other than a system call. I am sure the code is less than 20 lines... really I am wondering if someone has already written it?

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• Python way to clone a git repository

  - by Mike

  Is there a Python way without using a subprocess to clone a git repository? I'm up for using any sort of modules you recommend.

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• Is it worth using Python's re.compile?

  - by Mat

  Is there any benefit in using compile for regular expressions in Python? h = re.compile('hello') h.match('hello world') vs re.match('hello', 'hello world')

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