I am slowly but surely teaching myself Python. I learn best by doing. I'm looking for some neat system productivity kind of procedures that I could try making that you have found useful for yourself. Some of the modules I've successfully made and use are like these: Zip a folder Zip a whole set of folders to an archive as an automat...
I want to process uploaded photos with PIL and determine some "soft" image metrics like: is the image contrastful or dull? colorful or monochrome? bright or dark? is the image warm or cold (regarding light temperature)? is there a dominant hue? the metrics should be measured in a rating-style, e.g. colorful++++ for a very colorful ph...
I'm trying to test my Django apps which run on a postgis database, by following this doc: http://docs.djangoproject.com/en/dev/topics/testing/ Normally I create a new database by copying a template: (as user postgres) createdb -T template_postgis -O lizard test_geodjango2 When I run ./manage.py test, I get the following mess...
How can I make a "keep alive" HTTP request using Python's urllib2? ...
If I do this: def foo(): a = SomeObject() Is 'a' destroyed immediately after leaving foo? Or does it wait for some GC to happen? ...
Hello. Python has a lot of gui librarys: tknter, wxWidgets, pyGTK etc. But all this gui needs to be installed and quite heavyweight, so it's a bit complex to deploy end-user gui python apps that relay on mentioned gui librarys. Recently, i have thinked about python build-in ctypes. Theoretically, it's possible to create pure python gui...
Hi, I am just about to find out how python and gnuplot work together. On http://wiki.aims.ac.za/mediawiki/index.php/Python:Gnuplot_module I found an introduction and I wanted to execute it on my Ubuntu machine. import Gnuplot gp = Gnuplot.Gnuplot(persist = 1) gp('set data style lines') data1 = [[0, 0], [1, 1], [2, 4], [3, 9],...
Hi everyone! I have a simple "Invoices" class with a "Number" attribute that has to be assigned by the application when the user saves an invoice. There are some constraints: 1) the application is a (thin) client-server one, so whatever assigns the number must look out for collisions 2) Invoices has a "version" attribute too, so I can't...
Hello, My scenario is as follows: I have a table of data (handful of fields, less than a hundred rows) that I use extensively in my program. I also need this data to be persistent, so I save it as a CSV and load it on start-up. I choose not to use a database because every option (even SQLite) is an overkill for my humble requirement (al...
Hi I have a many-to-many relationship in my django application where I use the "add" method of the manager pretty heavily (ie album.photos.add() ). I find myself needing to store some data about the many-to-many relationship now, but I don't want to lose the add method. Can I just set a default value for all the additional fields on th...
I have some some data that I would like to visualize. Each byte of the source data roughly corresponds to a pixel value of the image. What is the easiest way to generate an image file (bitmap?) using Python? ...
Here is a screen where I should point the Wing IDE to my python files. I am using IronPython. Am I assuming correctly that textbox one gets filled with ipy.exe ? (proper path provided) What should be in the rest of the boxes ? ...
Hi, url = 'abcdc.com' print url.strip('.com') Expect: abcdc Resut: abcd Now I do url.rsplit('.com', 1) Is there a better way.. ...
When I run pyflakes on a Zope Filesystem Directory View file (as are found a lot in plone) it always returns lots of warnings that my parameters and special values like 'context' are not defined, which would be true if it were a real python script, but for a Filesystem Directory View script, they are defined by magic comments at the top,...
What would be the most pythonic way to schedule a function to run periodically as a background task? There are some ideas here, but they all seem rather ugly to me. And incomplete. The java Timer class has a very complete solution. Anyone know of a similar python class? ...
Suppose I have a socket. What is the difference between these two lines of code? line 1: os.read(some_socket.fileno(), 1024) line 2: some_socket.recv(1024) ...other than the fact that the first one doesn't work on Windows. In other words, can I substitute the second line for the first one? I've got a codebase that hasn't really...
Trying to remove all files in a certain directory gives me the follwing error OSError: [Errno 2] No such file or directory: '/home/me/test/*' The code I'm running is import os test = "/home/me/test/* os.remove(test) ...
Echoing my other question now need to find a way to crunch json down to one line: e.g. {"node0":{ "node1":{ "attr0":"foo", "attr1":"foo bar", "attr2":"value with long spaces" } }} would like to crunch down to a single line: {"node0":{"node1":{"attr0":"foo","attr1":"foo bar","attr2":"value...
I'm using the ConfigParser to read the configuration information stored in a file. I'm able to read the content and use it across other modules in the project. I'm not sure if the configuration file is read every time I call config.get(parameters). How can I make sure that the configuration information is read only once and rest of the t...
I want to disable "return" from printing any object it is returning to python shell. e.g A sample python script test.py looks like: def func1(): list = [1,2,3,4,5] print list return list Now, If i do following: python -i test.py >>>func1() This always give me two prints on python shell. I just want to print and get re...