🌐 Mailman 3 April 2013 - Python-list - python.org

Re: Performance of int/long in Python 3
by rusi April 2, 2013

April 2, 2013

On Mar 31, 5:55 pm, Mark Lawrence <breamore...(a)yahoo.co.uk> wrote: <snipped jmf's broken-record whine> > I'm feeling very sorry for this horse, it's been flogged so often it's > down to bare bones. While I am now joining the camp of those fed up with jmf's whining, I do wonder if we are shooting the messenger… >From a recent Roy mysqldb-unicode thread: > My unicode-fu is a bit weak. Are we looking at a Python problem, a > MySQLdb problem, or a problem with the underlying MySQL server? We've > certainly inserted utf-8 data before without any problems. It's > possible this is the first time we've tried to handle a character > outside the BMP. : : > OK, that leads to the next question. Is there anyway I can (in Python > 2.7) detect when a string is not entirely in the BMP? If I could find > all the non-BMP characters, I could replace them with U+FFFD > (REPLACEMENT CHARACTER) and life would be good (enough). Steven's: > But it means that if you're one of the 99.9% of users who mostly use > characters in the BMP, … And from http://www.tlg.uci.edu/~opoudjis/unicode/unicode_astral.html > The informal name for the supplementary planes of Unicode is "astral planes", since > (especially in the late '90s) their use seemed to be as remote as > the theosophical "great beyond". … > As of this writing for instance, Dreamweaver MX for MacOSX (which I am currently using > to prepare this) will let you paste BMP text into its WYSIWYG window; but pasting > Supplementary Plane text there will make it crash. So I really wonder: Is python losing more by supporting SMP with performance hit on BMP? The problem as I see it is that a choice that is sufficiently skew is no more a straightforward choice. An example will illustrate: I can choose to drive or not -- a choice. Statistics tell me that on average there are 3 fatalities every day; I am very concerned that I could get killed so I choose not to drive. Which neglects that there are a couple of million safe-drives at the same time as the '3 fatalities' [What if anything this has to do with jmf's rants I dont know because I dont know if anyone (including jmf) knows what he is ranting about. ]

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ISO deprecates ASCII Horizontal Tab control character
by fsb＠thefsb.org April 2, 2013

April 2, 2013

The subcommittee of ISO Joint Technical Committee 1 that is responsible for coded character sets has deprecated the Horizontal Tab control character in an approved revision of ISO/IEC 646 to be published in the next few months. "The days of HT's usefulness in printer control are long gone," said Dr. Yishoki Makimi, chair of the subcommittee. "Today tabs are only used in software source code. Our research revealed they serve no function in software engineering other than to provoke arguments and therefore waste time. We measured that HTs accumulated economic cost surpassed that of big vs. little-endian byte order in 2007 and started the committee work to deprecate it shortly after that." The width of a horizontal tab was originally adjustable in printer mechanism and was never standardized. Its subsequent use for indentation of instructions in the source code of block-oriented languages was economical when computer storage was expensive. Eventually many programmers adopted spaces leading to the contraversy that motivated the subcommittee. Microsoft has responded to ISO's move by announcing that HT will contunue be supported in Windows through Version 8, after which the code point will be repurposed for the Windows Key. Hillary Jeremy, Microsoft's code quality and standards boss, welcomed the move saying, "We've probably spent more time, over the years, fighting over tabs than we have spent fixing bugs in Office."

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youtube-dl, a YouTube downloader in Python
by vasudevram April 2, 2013

April 2, 2013

Folks may find this of interest, both from a programming and from an end-user point of view: youtube-dl, a YouTube downloader in Python: http://jugad2.blogspot.in/2013/03/youtube-dl-yourube-downloader-in-python.h… I tried it out and it worked well. Downloaded a few videos using it. (The "rube" in the URL was a typo, I would have had to delete and re-enter the post to fix it - see the post for the details :) - Vasudev Ram www.dancingbison.com

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Re: Performance of int/long in Python 3
by jmfauth April 2, 2013

April 2, 2013

--------- I'm not whining or and I'm not complaining (and never did). I always exposed facts. I'm not especially interested in Python, I'm interested in Unicode. Usualy when I posted examples, there are confirmed. What I see is this (std "download-abled" Python's on Windows 7 (and other Windows/platforms/machines): Py32 >>> import timeit >>> timeit.repeat("'a' * 1000 + 'ẞ'") [0.7005365263669056, 0.6810694766790423, 0.6811978680727229] >>> timeit.repeat("'a' * 1000 + 'z'") [0.7105829560031083, 0.6904999426964764, 0.6938637184431968] Py33 import timeit timeit.repeat("'a' * 1000 + 'ẞ'") [1.1484035160337613, 1.1233738895227505, 1.1215708962703874] timeit.repeat("'a' * 1000 + 'z'") [0.6640958193635527, 0.6469043692851528, 0.6458961423900007] I have systematically such a behaviour, in 99.99999% of my tests. When there is something better, it is usually because something else (3.2/3.3) has been modified. I have my idea where this is coming from. Question: When it is claimed, that this has been tested, do you mean stringbench.py as proposed many times by Terry? (Thanks for an answer). jmf

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Curl and python httplib?
by 小学园PHP April 2, 2013

April 2, 2013

Guys, I take a project that need send request to Hadoop by curl. But now, the curl and pycurl can't satisfy my project. So i need use the powerful httplib. But failed. my curl request: curl -i -X PUT "http://localhost:50070/webhdfs/v1/levi/7?op=CREATE" my return: HTTP/1.1 307 TEMPORARY_REDIRECT Content-Type: application/octet-stream Location: http://58.53.211.47:50075/webhdfs/v1/levi/7?op=CREATE&overwrite=false Content-Length: 0 Server: Jetty(6.1.26) Now, i change the curl request to httplib: import httplib import urllib params=urllib.urlencode({"@op":"CREATE","@user.name":"levi"}) headers={"Content-type": "application/x-www-form-urlencoded","Accept": "text/plain"} conn=httplib.HTTPConnection("localhost:50070") conn.request("PUT","/webhdfs/v1/levi/7.txt",params,headers) response=conn.getresponse() print response.status, response.reason data=response.read() print data conn.close() But it failed: #print response.status, response.reason 500 Internal Server Error #print data '{"RemoteException":{"exception":"WebApplicationException","javaClassName":"javax.ws.rs.WebApplicationException","message":null}}' Who knows why? It's OK when i use curl, so where is the problem in httplib method? Or some other reasons? Who can help me change the curl request to httplib edition? TIA Levi

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Error in working with Dict
by inshu chauhan April 1, 2013

April 1, 2013

I have this program which is working with 2 dictionaries segments, class_counts.. but I am getting an error mentioned below the programme. import cv from itertools import * from math import floor, sqrt, ceil from numpy import array, dot, subtract, add, outer, argmax, linalg as lin def Computesegclass(segimage, refimage): f = open("Pixel_count_with_region_num_trial1.txt", "w") segments = {} class_count = {} for y in xrange(0, segimage.height): for x in xrange(0, segimage.width): if segimage[y,x] == (0.0, 0.0, 0.0): continue else: seg_color = segimage[y,x] blue = int(seg_color[0]) green = int(seg_color[1]) red = int(seg_color[2]) region_num = blue + 256 * green + 65536 * red #print region_num segments[region_num] = segments.setdefault(region_num, 0) + 1 #print segments class_color = refimage[y,x] if class_color == (0.0,0.0,0.0): class_number = 0 # No class elif class_color == (0.0,255.0,0.0): class_number = 1 # Trees elif class_color == (255.0, 0.0, 128.0): class_number = 2 # Buildings elif class_color == (0.0,0.0,255.0): class_number = 3 # Automobiles elif class_color == (255.0, 255.0, 0.0): class_number = 4 # Road Points elif class_color == (0.0, 64.0, 128.0): class_number = 5 # Tree trunks nad branches elif class_color == (255.0, 0.0 ,0.0): class_number = 6 # Poles elif class_color == (255.0, 0.0, 255.0): class_number = 7 # Traffic Lights else: class_number = 0 # Gray Pixel class_count.setdefault(region_num, [0, 0, 0, 0, 0, 0, 0, 0])[class_number] += 1 # print class_count for k in sorted(class_count.iterkeys()): i = argmax(class_count[k]) print >> f, i if __name__== "__main__": segimage = cv.LoadImageM(r"C:\Users\inshu\Desktop\Masters Thesis\Segmentation\segmentation_numbers_00000.tif", cv.CV_LOAD_IMAGE_UNCHANGED) refimage = cv.LoadImageM(r"C:\Users\inshu\Desktop\Masters Thesis\Segmentation\Hand_Classified1.tif", cv.CV_LOAD_IMAGE_UNCHANGED) print segimage Computesegclass(segimage, refimage) ERROR : Traceback (most recent call last): File "C:\Users\inshu\Desktop\seg.py", line 49, in <module> for k in sorted(class_count.iterkeys()): NameError: name 'class_count' is not defined I know this error is because I have initialized both dicts inside the function, But why dicts are not saved out, if I intialize the dicts outside the function, the processing is still done inside and end result I am getting is an empty dict. Thanks in Advance for suggestions!!!!

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A Healthy Alternative to Takeaway Regret
by 23alagmy April 1, 2013

April 1, 2013

A Healthy Alternative to Takeaway Regret http://natigtas7ab.blogspot.com/2013/03/a-healthy-alternative-to-takeaway-r…

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How to do this?
by Ana Dionísio April 1, 2013

April 1, 2013

So I have this script: " from numpy import array vt=[0]*20 vt = array(vt, dtype=dict) for t in range(20): if t == 4: vt[t]=1 else: vt[t]=0 " And have this output: [0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] What I need is when t == 4 I need to put 1 in that position and in the next 3, for example the following output: [0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0] Do you have any suggestions? I'm sorry if I can't explain this in a better way, English is not my first language Thank you

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Rapid CHM Maker
by Myles Dhaval Carne April 1, 2013

April 1, 2013

Rapid CHM Maker http://t.co/dIGazO0Xbz DriverMatcher http://t.co/34lL03D9Uv AWSVideoScreenRecordHDTV http://t.co/61Ers2gX7K Stay Away Alergies Software http://t.co/WzsjycKCpv WareSoft Sudoku http://t.co/GPzieBjDsj Rapid CHM Maker

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Re: How to do this?
by Ana Dionísio April 1, 2013

April 1, 2013

Nice! Thank you! And if I need something like this? [0 0 0 0 0.17 0.17 0.17 0.17 0 0 0 0.17 0.17 0.17 0 0 0 0 0 0 0] How can I do this?

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