kassoulet codelog

How to uninstall a python program, packaged with distutils (setup.py)

noreply@blogger.com (Gautier Portet) — Wed, 20 May 2009 21:01:00 +0000

So you have installed a program by running something like sudo setup.py install and want to remove it, without forgetting a file or mess with the system ?
It's simple in fact. Install checkinstall. And run sudo checkinstall python setup.py install to create a package for your system, and remove it with dpkg -r NAME_OF_PACKAGE.
Checkinstall is an handy tool, it replays the install procedure while inspecting what is being done, and creates a package doing the same thing. With uninstall.

Luc Besson contre la Joconde

noreply@blogger.com (Gautier Portet) — Fri, 10 Apr 2009 18:40:00 +0000

"On ne vole pas les tableaux au Louvre il me semble !" -- Luc Besson

Non, on n'a pas le droit de voler la Joconde...
Mais on a le droit d'en avoir une photo.
On a le droit de faire une copie de la photo.
Et le droit de faire une copie de la copie de la photo.
Et la Joconde est toujours en place, épatant non ?

Nautilus-folder-actions

noreply@blogger.com (Gautier Portet) — Sun, 01 Mar 2009 21:07:00 +0000

You want to add buttons in the Nautilus toolbar, all read from a custom file in the current view ?
You want to add a button to launch "git gui" from your code folder ?
So nautilus-folder-action is for you !

Auto Vectorize Decorator

noreply@blogger.com (Gautier Portet) — Thu, 26 Jun 2008 19:41:00 +0000


def vectorize(f):
 """
 Allows a traditionnal python function to be called with
 iterables arguments.

 So when you call func([array]) it will do the iteration for you,
 call func() for each element in array, and return an array.

 All arguments must be iterable, if you want to pass something else,
 use a keyword argument.

 """
 def _vectorize(*args, **kwargs):
     if not isiterable(args[0]):
         return f(*args, **kwargs)
     else:
         return [f(*arg, **kwargs) for arg in zip(*args)]
 return _vectorize

# to use it:

@vectorize
def my_func(arguments):
 # do something interesting, on ONE element.

my_func(my_args)
my_func(my_super_list_of_many_values)

Get a hash of a given module in python

noreply@blogger.com (Gautier Portet) — Tue, 18 Mar 2008 15:53:00 +0000

This small function use the inspect and sha modules to return you a hash of the given module/class/function.
Note that we only hash the bytecode, so only really modified code will change the resulting hash.


import inspect

def get_module_hash(root, obj=None, hash=None, verbose=False):
   if not obj:
       obj = root
       if verbose:
           print obj.__name__
   if not hash:
       import sha
       hash = sha.new()

   for member in inspect.getmembers(obj):
       name, child = member

       if inspect.ismodule(child):
           if child.__name__.startswith(root.__name__):
               if child != root:
                   if verbose:
                       print child.__name__
                   hash = get_module_hash(root, child, hash, verbose)

       if inspect.isclass(child):
           if child.__module__.startswith(root.__name__):
               if verbose:
                   print '  ', child.__name__
               hash = get_module_hash(root, child, hash, verbose)

       if inspect.ismethod(child):
           if verbose:
               print '    ', child.__name__
           hash.update(child.im_func.func_code.co_code)

       if inspect.isfunction(child):
           if root.__name__ in child.func_code.co_filename:
               if verbose:
                   print '  ', child.__name__
               hash.update(child.func_code.co_code)
   return hash

hash = get_module_hash(yourmodule)
print 'version hash:', hash.hexdigest()

Dose2 - Now in fullscreen splendor

noreply@blogger.com (Gautier Portet) — Tue, 12 Feb 2008 21:55:00 +0000

I love the Dose2 [1] demo by mfx, but I always wanted it to run in a better resolution, as it is fully vectorial. So here it is, finally you can run it in 1600x1200 if you dare!

Download the sources [2], compile and run!

You can try the following command line options:

-fullscreen : obviously, switch to fullscreen.
-stretch : use the current resolution.
-nofill : do not apply the magic xor - some kind of wireframe, search fillcopy() in main.c to see some f*cking clever code.
-WIDTHxHEIGHT : choose resolution. WIDTH and HEIGHT can be any size.

[1] http://pouet.net/prod.php?which=3289
[2] http://kassoulet.free.fr/files/dose2_2008-05-03.tar.gz (new, 2x faster version!)

Ed: Now also on github.
Ed2: Backbuffer was blitted two times, new version is 2x faster in big resolutions!

Splitting a mp3 album (mp3+cue) in separate files without recoding

noreply@blogger.com (Gautier Portet) — Wed, 23 Jan 2008 10:43:00 +0000

So you have demovibes and you would like to have it with separate tracks so you can skip one?

This is really simple, here is the magic command: (in one line)

mp3splt -c demovibes3.cue demovibes3-80mn_scene_music_compilation_mixed_by_willbe.mp3 -d demovibes3 -o @n-@p-@t

You will need the nice mp3splt of course, and it works also for ogg vorbis!
If you want tags, you can extract them from filenames, with easytag for example.

How to clear disk cache in Linux

noreply@blogger.com (Gautier Portet) — Wed, 05 Dec 2007 10:37:00 +0000


sync ; sudo echo 3 | sudo tee /proc/sys/vm/drop_caches

edit: better safe than sorry: flush caches before, as suggested...

Vice Dual Sid patch

noreply@blogger.com (Gautier Portet) — Mon, 30 Jul 2007 13:23:00 +0000

Here is my crappy patch to Vice 1.21 to add my special 6581 + 8580 stereo output. You can listen to some examples.

After applying the patch, you will just have to select the dual sid option (note that this will also disable the previous dual sid functionality). You will now have both 6581 and 8580 in separate channels, in real time and record mode. Enjoy!

edit: updated patch for Vice 2.0

Knights demos on youtube.

noreply@blogger.com (Gautier Portet) — Mon, 09 Jul 2007 14:43:00 +0000

Yeah I encoded styler2 and schtroumpf2 and uploaded them on youtube.
The quality is rather bad, I will upload high quality videos somewhere else soon.

Faster ListStore

noreply@blogger.com (Gautier Portet) — Wed, 30 May 2007 23:50:00 +0000

Your are wondering why ListStore.append() is so slow in your code?
No more turtle-soft: disconnect the view and the store by doing TreeView.set_model(None), edit the ListStore, and then reconnect them.

Tadaaa, this is just thousands of time faster here...

Returning a array of structs with dbus-glib

noreply@blogger.com (Gautier Portet) — Fri, 11 May 2007 16:39:00 +0000

I was looking for an example on how to return an array of struct in a D-Bus program, and I found nothing. So here is a fast note for later reference.

This is pseudo code, just to show you how to proceed.

So you want to return a "a(si)", that's it, an array of struct containing each a string and an integer.

in your example.xml: (process with dbus-binding-tool as usual)


<node name="/com/example/Example"></node>
    <interface name="com.example.Example"></interface>
        <method name="getExampleArray"></method>
            <arg type="a(si)" name="array" direction="out"></arg>
  </method>
 </interface>
</node>

in your example.c:


// you define your structure here by using get_struct 
#define DBUS_STRUCT_STRING_INT (dbus_g_type_get_struct ("GValueArray", G_TYPE_STRING, G_TYPE_INT, G_TYPE_INVALID))

gboolean desktoptracks_get_example_array(DesktopTracks *obj, GPtrArray **stats_data, GError **error)
{
  for ( each element you want to return )
  {
      element_string , element_int = the element you want to return

      GValue *value;

      value = g_new0 (GValue, 1);
      g_value_init (value, DBUS_STRUCT_STRING_INT);
      g_value_take_boxed (value, dbus_g_type_specialized_construct (DBUS_STRUCT_STRING_INT));

      // field number, value, G_MAXUINT at the end
      dbus_g_type_struct_set (value, 0, element_string, 1, element_int, G_MAXUINT);
      g_ptr_array_add (array, g_value_get_boxed (value));
      g_free (value);
  }
}

Easy uh ?

SoundConverter 0.9.6

noreply@blogger.com (Gautier Portet) — Sat, 28 Apr 2007 14:20:00 +0000

I've just uploaded a version, which fixes a stupid problem in one Makefile.am (No, there is no need for DESTDIR there :) ).

Previous 0.9.5 version mainly fixed a problem with spaces in filenames when encoding to the same folder (Hell must be filled by escaped characters).

And website look was updated as well!

I think we are pretty close of a 1.0, we need more test, more polish and more love and we are done. And after 1.0 we will add some new features.

gXiso website updated

noreply@blogger.com (Gautier Portet) — Thu, 14 Dec 2006 10:44:00 +0000

I just updated the gXiso website.

I will maybe do some enhancements to this nice program soon, including a port to MacOSX.