Using sorted is an oversight, I've tried hard to avoid requiring a newer versions of python in gtk-builder-convert, it should in theory work with python 2.0.

sorted(x) should just be sorted_x = list(x); sorted_x.sort() instead.

>for obj in sorted(self.root_objects,
>                  key=lambda n: n.getAttribute('id'),
>                  reverse=True):
>    self._interface.childNodes.insert(0, obj)

I gave it a whirl:

>objects=self.root_objects
>objects.sort(key=lambda n: n.getAttribute('id'),
>             reverse=True)
>for obj in objects:
>    self._interface.childNodes.insert(0, obj)

Works fine in python2.5, but it's still not portable. Under python2.3,

Traceback (most recent call last):

+ Trace 209524

I can move reverse=True out:

>objects=self.root_objects
>objects.sort(key=lambda n: n.getAttribute('id'))
>objects.reverse()
>for obj in objects:
>    self._interface.childNodes.insert(0, obj)

but that's only half of the problem. I don't know enough python to write a custom cmpfunc rather than using modern key= keyword.

>objects.sort(key=lambda n: n.getAttribute('id'))

can be written as:

objects.sort(lambda a, b: cmp(a.getAttribute('id'),
                              b.getAttribute('id')))

2008-11-25  Johan Dahlin  <jdahlin@async.com.br>

    Bug 559947 – Unchecked dependency on python>=2.4

    * gtk/gtk-builder-convert:
    Avoid using sorted() which is only present in python 2.

Found another "new python" syntax in that script. With python2.3, building gnome-terminal-2.24.3 crashes:

/sw/bin/gtk-builder-convert profile-preferences.glade profile-preferences.ui
Traceback (most recent call last):

+ Trace 211508

The offending code is around line 528:
>properties.update(value=value,
>                  lower=lower,
>                  upper=upper,
>                  step_increment=step,
>                  page_increment=page,
>                  page_size=page_size)

but in python2.3, dict.update only takes a simple dictionary, not a list of key=value parameters.

This seems equivalent (to my non-python-expert eyes) and "works" (by which I mean "doesn't crash") on py23:

>properties.update({"value":value,
>                   "lower":lower,
>                   "upper":upper,
>                   "step_increment":step,
>                   "page_increment":page,
>                   "page_size":page_size})

This script also crashes when the current python version
is >= 3.0. It uses print statements, but in python 3 print
became a function. There may be other python 3
incompatibilities.

Please change the title of this bug to reflect that this
script also depends on python < 3.0.

This crash is common on the MacPorts platform, where
there is no standard default python version, and it causes
at least one other port to fail to build. See:

http://trac.macports.org/ticket/19441

Please upgrade the severity and priority of this bug.

I'm afraid that the only practical solution may be to
choose a specific major python version, depend on it,
and hard-wire it into the shell-bang.

The above patch for the sorted() problem fixed breakage
for Python < 2.4, but introduced new breakage for
Python >= 3. There, the sort() method no longer supports
comparison functions.

Here is code that will work from Python 3 all the way
back to very old Python, even before list comprehensions:

> obj_ids = []
> for i in range(len(self.root_objects)):
>     obj_ids.append((self.root_objects[i].getAttribute('id'), i))
> obj_ids.sort()
> obj_ids.reverse()
> for id in obj_ids:
>     self._interface.childNodes.insert(0, self.root_objects[id[1]])

And it will only get worse. For example, the string format
operator "%" is scheduled to be deprecated in Python 3.1.
That will require extensive messy changes to continue to
support all Python versions.

gtk-builder-convert has been removed from GTK+.

Also, using Glade is the prefered methos to convert files from libglade to GtkBuilder format