🌐 Mailman 3 September 2010 - Python-list - python.org

Re: feature request: string.contains('...')
by John Posner Sept. 24, 2010

Sept. 24, 2010

On 9/24/2010 2:45 PM, Tim Chase wrote: > On 09/24/10 13:01, Ethan Furman wrote: >> John Posner wrote: >>> Another "missing feature" candidate: sublist >>> >>> >>> 'bc' in 'abcde' >>> True >>> >>> list('bc') in list('abcde') >>> False >> >> I'm not aware of any idioms, but how about a simple function? <snip> > > Foldable into a one-line version if one's sick enough to use it: <snip> Looking at this a bit more, I can see why the *in* operator applies to strings, but not to lists. Consider the ambiguity in this "heterogeneous" list: mylist = [0, 1, 2, 3, [a, b], 10, 11, 12, a, b, 13] Should the expression *[a, b] in mylist* get a hit at offset 4, or at slice [8:10]? If you know that your lists will be homogeneous ("scalar" values only), or if you're willing to program around the potential ambiguity, then Ethan's function can easily be adapted into a __contains__() method of a *list* subclass. Tx, John

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SocketServer: replace network by hard drive
by antoine Sept. 24, 2010

Sept. 24, 2010

Hello, I would like to create a python server for which the requests are passed by files on the hard drive instead of a network. I am currently looking at the SocketServer python module, hoping for an easy modification. Is it doable at all? If yes, how should it be done? Thanks, Antoine.

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Re: feature request: string.contains('...')
by John Posner Sept. 24, 2010

Sept. 24, 2010

On 9/24/2010 4:21 AM, Peter Otten wrote: > > If you are not interested in the position of the substr use the "in" > operator: > > if substr in s: > print "found" > else: > print "not found" > Another "missing feature" candidate: sublist >>> 'bc' in 'abcde' True >>> list('bc') in list('abcde') False A little Googling indicates that Haskell *does* have this feature: [1] ghci> [2,6] `isInfixOf` [3,1,4,1,5,9,2,6,5,3,5,8,9,7,9] True I haven't located an equivalent Python idiom, though. I took a quick look through numpy, but no luck. Can anyone help? Tx, John [1] http://book.realworldhaskell.org/read/functional-programming.html

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Python 2.6: How to turn off cgitb.py's DeprecationWarning: BaseException.message has been deprecated
by python＠bdurham.com Sept. 24, 2010

Sept. 24, 2010

Python 2.6: We're using the standard lib's cgitb module to provide diagnostic messages when unexpected exceptions occur. Unfortunately, this module raises a DeprecationWarning like below when it is used: C:\Python26\lib\cgitb.py:245: DeprecationWarning: BaseException.message has been deprecated as of Python 2.6 value = pydoc.text.repr(getattr(evalue, name)) Is there some way to disable this specific warning message (our customers find it disconcerting) or do we have to go in and edit the cgitb.py module itself? Also, wondering if this warning has been addressed in Python 2.7/3.x? Thank you, Malcolm

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Re: inspect.getmodulename giving unexpected results
by Geoff Bache Sept. 24, 2010

Sept. 24, 2010

> > Unfortunately, it doesn't seem to do that in some cases. Consider the > > following code: > > It does behave as documented: it does not find package names, or investigate > sys.modules Possibly, although for me "logging" is exposed as a module, and ought to behave as one when requesting the module name. The fact that it's a package internally doesn't seem relevant to me in this context. It's weird to me that when I do import os, logging treating these things as normal modules I can get the right name for "os" but get "__init__" when requesting "logging". Externally, these things appear to be the same. I can accept from the docs that if I did "getmodulename" on "logging.config" I would get "config" back. > > > ## file 'inspect_test' > > rename this file to "inspect_test.py", and the filename will make sense to > inspect.getmodulename, which should *then* return "inspect_test" instead of > None. I realise that, but of course I can't do that in the real code. It's a long-established convention to drop the ".py" from executable programs on UNIX. Regards, Geoff

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Re: Subprocess does not return for longer-running process
by Nobody Sept. 24, 2010

Sept. 24, 2010

On Tue, 21 Sep 2010 23:54:04 -0700, Dennis Lee Bieber wrote: >> As your Traceback clearly indicates, the Popen() call has already >> completed; it's *the os.waitpid() call* that's blocking, but that's >> entirely to be expected given its defined behavior. If you don't want >> to wait around for the process to die, then don't call waitpid() on it >> in the first place! >> > And a likely reason the waitpid() if blocking is that the > sub-process is blocking trying to write to pipe that is full. Which is why you should always use the .communicate() method if you redirect two or more of std{in,out,err} to a pipe (this is why the Unix popen() function only lets you redirect one of the standard descriptors). And I can't think of any reason why you should use os.waitpid() or similar; use the .wait() method.

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Expanding a vector by replicating elements individually
by gburdell1＠gmail.com Sept. 24, 2010

Sept. 24, 2010

Given m=numpy.array([[1, 2, 3]]) I want to obtain array([[1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3]]) One way I've found to do this is: numpy.reshape(numpy.tile(m,(4,1)),(12,1),'f').T Another way is: numpy.reshape(numpy.tile(m,(4,1)).flatten(1),(1,12)) Is there a simpler way to do this, without having to go jump through so many hoops?

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Re: upload file using post to https server
by Brian Jones Sept. 24, 2010

Sept. 24, 2010

I just did this yesterday with the 'poster' module after fumbling around with various other ideas, which in the end just produced a lot of code and didn't get me very far. Poster makes this pretty easy, and if you can't install it to the system python path, use 'setup.py install --user' and it'll put it in your home directory under ~/.local. With poster, it's a breeze. Here's what I've done. Hope it helps: #!/usr/bin/env python import random from poster.encode import multipart_encode from poster.streaminghttp import register_openers import urllib2 import threading import time class Requestor(threading.Thread): def __init__(self, port): threading.Thread.__init__(self) self.port = port def run(self): register_openers() post_param1 = 'cheddar' post_param2 = 'leicester' params, headers = multipart_encode({"pic": open("image.jpg"), "param1": post_param1, "param2": post_param2}) request = urllib2.Request("http://mybox:%s/" % self.port, params, headers) curtime = time.time() response = urllib2.urlopen(request).read() perftime = time.time() - curtime print "Query time: %s\n" % perftime if __name__ == "__main__": for i in range(2000): port = random.choice(range(8885,8905)) t = Requestor(port) t.start() This is a basic threaded performance testing script that sends an image, and two other paramters, all in a POST request to a web server that opens multiple ports. If you don't need the threading, you should be able to rip the 'run()' method out of the class and just run it by itself (save an edit or two -- like hard-coding or otherwise replacing self.port). Good luck! brian On Fri, Sep 24, 2010 at 4:23 AM, Dennis Lee Bieber <wlfraed(a)ix.netcom.com>wrote: > On Thu, 23 Sep 2010 11:10:55 -0700 (PDT), cerr <ron.eggler(a)gmail.com> > declaimed the following in gmane.comp.python.general: > > > > values = { 'filename' : 'pAce34-7.1.2.3-5189k-efs.bin' } > > > > try: > > data = urllib.urlencode( values ) > > > But the file doesn't seem to get there correctly. What I wanna do, is > > mocking the upload from the html site with my python script.... the > > html looks something like this: > > And are you expecting the server to somehow crawl down the socket > to > your machine to find the file, then suck it up? > > Where do you actually attach the file data to the outgoing response? > > Suggest you reference the RFC that added file upload to HTML: > http://www.faqs.org/rfcs/rfc1867.html > > In particular, section 3.3 > -=-=-=-=-=- > 3.3 use of multipart/form-data > > The definition of multipart/form-data is included in section 7. A > boundary is selected that does not occur in any of the data. (This > selection is sometimes done probabilisticly.) Each field of the form > is sent, in the order in which it occurs in the form, as a part of > the multipart stream. Each part identifies the INPUT name within the > original HTML form. Each part should be labelled with an appropriate > content-type if the media type is known (e.g., inferred from the file > extension or operating system typing information) or as > application/octet-stream. > -=-=-=-=-=- > > You've just supplied the file NAME part of the form, but not the > file data. > -- > Wulfraed Dennis Lee Bieber AF6VN > wlfraed(a)ix.netcom.com HTTP://wlfraed.home.netcom.com/ > > -- > http://mail.python.org/mailman/listinfo/python-list > -- Brian K. Jones My Blog http://www.protocolostomy.com Follow me http://twitter.com/bkjones

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lists and list item matches (ghost wodgame)
by Baba Sept. 24, 2010

Sept. 24, 2010

Hi query level: beginner as part of a learning exercise i have written code that: a) asks for a single letter input (assumption: only 1 letter wil be entered) b) adds that letter to list1 and then goes through list2 and checks: 1) if any item in list2 starts with list1 > if False: break 2) if list1 == any item in list2 > if True: break c) start again until 2) is True wordlist = ['hello', 'bye'] handlist = [] letter = raw_input('enter letter: ') handlist.append(letter) hand = "".join(handlist) for item in wordlist: if item.startswith(hand): while item.startswith(hand): if hand not in wordlist: letter = raw_input('enter letter: ') handlist.append(letter) hand = "".join(handlist) else: break else: break print 'you loose' this code works but can it be optimised? i have the feeling that my nesting of IF, WHILE and FOR statements is overkill? inspired by part IV of http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-00… thanks Baba

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inspect.getmodulename giving unexpected results
by Geoff Bache Sept. 24, 2010

Sept. 24, 2010

Hi all, I'm trying to examine some things in my stack. The information I get out of inspect.stack() gives file names and I would like to convert them to module names. I naturally assumes inspect.getmodulename would fix this for me. Unfortunately, it doesn't seem to do that in some cases. Consider the following code: ## file 'inspect_test' #!/usr/bin/env python import logging, inspect print inspect.getmodulename(logging.__file__), inspect.getmodulename(__file__) I hoped that this would print logging __main__ or at least logging inspect_test but instead it prints __init__ None which isn't very helpful, although it could technically be considered correct (I can go to the 'logging' directory and type "import __init__" but nobody ever does) I guess I was hoping to get the names of the modules as they appear in sys.modules. Maybe there is some other way to do that? I can naturally write my own method to do this but wondered if I'm missing something here. Regards, Geoff Bache

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