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

Re: pylint scores
by Peter Otten July 30, 2010

July 30, 2010

wheres pythonmonks wrote: > I am starting to use pylint to look at my code and I see that it gives a > rating. What values do experienced python programmers get on code not > targeting the benchmark? > > I wrote some code, tried to keep it under 80 characters per line, > reasonable variable names, and I got: > > 0.12 / 10. > > Is this a good score for one not targeting the benchmark? (pylint > running in default mode) No. About 5 is typically OK for undocumented code. I've heard. Ratings do not always make sense: $ for f in /usr/lib/python2.6/{glob,csv,doctest,collections}.py; do echo $f; pylint 2>/dev/null $f | grep "Your code has"; done /usr/lib/python2.6/glob.py Your code has been rated at 8.54/10 /usr/lib/python2.6/csv.py Your code has been rated at 6.45/10 /usr/lib/python2.6/doctest.py Your code has been rated at 7.77/10 /usr/lib/python2.6/collections.py Your code has been rated at -4.71/10 $ For mainstream code you can easily reach 10 by adding bogus docstrings and pointless long variable names, i. e. you can get higher scores for lower code quality. Peter PS: My favourite wtf message is "too few public methods"

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July 30, 2010

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pylint scores
by wheres pythonmonks July 30, 2010

July 30, 2010

I am starting to use pylint to look at my code and I see that it gives a rating. What values do experienced python programmers get on code not targeting the benchmark? I wrote some code, tried to keep it under 80 characters per line, reasonable variable names, and I got: 0.12 / 10. Is this a good score for one not targeting the benchmark? (pylint running in default mode) Somewhat related: Is the backslash the only way to extend arguments to statements over multiple lines? (e.g.) >>> def f(x,y,z): return(x+y+z); ... >>> f(1,2, ... 3) 6 >>> assert f(1,2,3)>0, File "<stdin>", line 1 assert f(1,2,3)>0, ^ SyntaxError: invalid syntax >>> In the above, I could split the arguments to f (I guess b/c of the parens) but not for assert. I could use a backslash, but I find this ugly -- it that my only (best?) option? [I really like to assert my code to correctness and I like using the second argument to assert, but this resulted in a lot of long lines that I was unable to break except with an ugly backslash.] W

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combined functionality of ipython's %whos and pdb's next (without a resource heavy IDE)
by Benjamin J. Racine July 30, 2010

July 30, 2010

I am trying to combine the ability to move line-by-line through the code as is done with pdb's "next" function with ipython's ability to list all variables at once... without the use of a full-fledged IDE. I am not seeing how this might be done. Many thanks for your help... Ben Racine

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Basic Information about Python
by Durga D July 30, 2010

July 30, 2010

Hi All, I am new to python based application developement. I am using Windows XP. 1. Can I create desktop application (just hello world program) with Python language like exe in VC++? 2. If First statement is Yes, Can I include this application with my existing setup(assume 10 MB) for windows? 3. If Second statement is Yes, What will be the setup size? Thank in advance. Regards, Durga.

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urllib timeout
by kBob July 30, 2010

July 30, 2010

I created a script to access weather satellite imagery fron NOAA's ADDS. It worked fine until recently with Python 2.6. The company changed the Internet LAN connections to "Accept Automatic settings" and "Use automatic configuration script" How do you get urllib.urlopen to use the the "automatic script" configuration? This code worked recently, until the company implemented these LAN connections... SAT_URL = "http://adds.aviationweather.gov/data/satellite/ latest_BWI_vis.jpg" satpic = urllib.urlopen(SAT_URL, proxies=0 ) satimg = satpic.read() Kelly Dean Fort Collins, CO

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solving Tix problem in ubuntu jaunty
by jimgardener July 30, 2010

July 30, 2010

hi, recently I switched to ubuntu jaunty and installed python 2.6.I installed lib-tk so that I can work on my gui apps using Tix and Tkinter.But ,it seems that the python version in jaunty ships a buggy tix version which gives a 'TclError:unknown color' error message (this happens when I try to use FileSelectBox in Tix). I tried to find if the installation is proper by >>root=Tix.Tk() >>root.tk.eval('package require Tix') This outputs the string '8.4' How do I correct the problem?I downloaded the source Tix8.4.3-src.tar from sourceforge site.Can somebody tell me how I can install this so I can use the bug free Tix from python2.6> thanks jim

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RE: Ascii to Unicode.
by Lawrence D'Oliveiro July 30, 2010

July 30, 2010

In message <mailman.1307.1280425706.1673.python-list(a)python.org>, Joe Goldthwaite wrote: > Next I tried to write the unicodestring object to a file thusly; > > output.write(unicodestring) > > I would have expected the write function to request the byte string from > the unicodestring object and simply write that byte string to a file. Encoded according to which encoding?

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Re: Ascii to Unicode.
by John Nagle July 30, 2010

July 30, 2010

On 7/28/2010 3:58 PM, Joe Goldthwaite wrote: > This still seems odd to me. I would have thought that the unicode function > would return a properly encoded byte stream that could then simply be > written to disk. Instead it seems like you have to re-encode the byte stream > to some kind of escaped Ascii before it can be written back out. Here's what's really going on. Unicode strings within Python have to be indexable. So the internal representation of Unicode has (usually) two bytes for each character, so they work like arrays. UTF-8 is a stream format for Unicode. It's slightly compressed; each character occupies 1 to 4 bytes, and the base ASCII characters (0..127 only, not 128..255) occupy one byte each. The format is described in "http://en.wikipedia.org/wiki/UTF-8". A UTF-8 file or stream has to be parsed from the beginning to keep track of where each Unicode character begins. So it's not a suitable format for data being actively worked on in memory; it can't be easily indexed. That's why it's necessary to convert to UTF-8 before writing to a file or socket. John Nagle

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RE: Ascii to Unicode.
by Lawrence D'Oliveiro July 30, 2010

July 30, 2010

In message <mailman.1309.1280426398.1673.python-list(a)python.org>, Joe Goldthwaite wrote: > Ascii.csv isn't really a latin-1 encoded file. It's an ascii file with a > few characters above the 128 range that are causing Postgresql Unicode > errors. Those characters work fine in the Windows world but they're not > the correct byte representation for Unicode. In other words, the encoding you want to decode from in this case is windows-1252.

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