<s>
PyGTK	B-Language
is	O
a	O
set	O
of	O
Python	B-Language
wrappers	O
for	O
the	O
GTK	B-Application
graphical	B-Application
user	I-Application
interface	I-Application
library	B-Library
.	O
</s>
<s>
PyGTK	B-Language
is	O
free	B-Application
software	I-Application
and	O
licensed	O
under	O
the	O
LGPL	B-Application
.	O
</s>
<s>
It	O
is	O
analogous	O
to	O
PyQt/PySide	O
and	O
wxPython	B-Language
,	O
the	O
Python	B-Language
wrappers	O
for	O
Qt	B-Language
and	O
wxWidgets	B-Language
,	O
respectively	O
.	O
</s>
<s>
Its	O
original	O
author	O
is	O
GNOME	B-Application
developer	O
James	O
Henstridge	O
.	O
</s>
<s>
PyGTK	B-Language
has	O
been	O
selected	O
as	O
the	O
environment	O
of	O
choice	O
for	O
applications	O
running	O
on	O
One	O
Laptop	O
Per	O
Child	O
systems	O
.	O
</s>
<s>
PyGTK	B-Language
will	O
be	O
phased	O
out	O
with	O
the	O
transition	O
to	O
GTK	B-Application
version	O
3	O
and	O
be	O
replaced	O
with	O
PyGObject	O
,	O
which	O
uses	O
GObject	B-Language
Introspection	I-Language
to	O
generate	O
bindings	O
for	O
Python	B-Language
and	O
other	O
languages	O
on	O
the	O
fly	O
.	O
</s>
<s>
This	O
is	O
expected	O
to	O
eliminate	O
the	O
delay	O
between	O
GTK	B-Application
updates	O
and	O
corresponding	O
language	B-Application
binding	I-Application
updates	O
,	O
as	O
well	O
as	O
reduce	O
maintenance	O
burden	O
on	O
the	O
developers	O
.	O
</s>
<s>
The	O
Python	B-Language
code	I-Language
below	O
will	O
produce	O
a	O
200x200	O
pixel	O
window	O
with	O
the	O
words	O
"	O
Hello	O
World	O
"	O
inside	O
.	O
</s>
<s>
PyGTK	B-Language
has	O
been	O
used	O
in	O
a	O
number	O
of	O
notable	O
applications	O
,	O
some	O
examples	O
:	O
</s>
<s>
PyGObject	O
provides	O
a	O
wrapper	O
for	O
use	O
in	O
Python	B-Language
programs	I-Language
when	O
accessing	O
GObject	B-Language
libraries	O
.	O
</s>
<s>
GObject	B-Language
is	O
an	O
object	O
system	O
used	O
by	O
GTK	B-Application
,	O
GLib	B-Language
,	O
GObject	B-Language
,	O
GIO	B-Language
,	O
GStreamer	B-Language
and	O
other	O
libraries	O
.	O
</s>
<s>
Like	O
the	O
GObject	B-Language
library	B-Library
itself	O
,	O
PyGObject	O
is	O
licensed	O
under	O
the	O
GNU	B-Application
LGPL	I-Application
,	O
so	O
it	O
is	O
suitable	O
for	O
use	O
in	O
both	O
free	B-Application
software	I-Application
and	O
proprietary	O
applications	O
.	O
</s>
<s>
PyGObject	O
can	O
dynamically	O
access	O
any	O
GObject	B-Language
libraries	O
that	O
use	O
GObject	B-Language
Introspection	I-Language
.	O
</s>
<s>
It	O
replaces	O
the	O
need	O
for	O
separate	O
modules	O
such	O
as	O
PyGTK	B-Language
,	O
GIO	B-Language
and	O
python-gnome	O
to	O
build	O
a	O
full	O
GNOME	B-Application
3.0	O
application	O
.	O
</s>
<s>
Once	O
new	O
functionality	O
is	O
added	O
to	O
GObject	B-Language
library	B-Library
it	O
is	O
instantly	O
available	O
as	O
a	O
Python	B-Language
API	O
without	O
the	O
need	O
for	O
intermediate	O
Python	B-Language
glue	O
.	O
</s>
<s>
PyGObject	O
has	O
replaced	O
PyGTK	B-Language
,	O
but	O
it	O
has	O
taken	O
a	O
considerable	O
amount	O
of	O
time	O
for	O
many	O
programs	O
to	O
be	O
ported	O
.	O
</s>
<s>
Most	O
of	O
the	O
software	O
listed	O
here	O
has	O
an	O
older	O
version	O
which	O
used	O
PyGTK	B-Language
.	O
</s>
