<s>
PyQt	B-Language
is	O
a	O
Python	B-Language
binding	B-Application
of	O
the	O
cross-platform	B-Operating_System
GUI	B-Application
toolkit	O
Qt	B-Language
,	O
implemented	O
as	O
a	O
Python	B-Language
plug-in	B-Application
.	O
</s>
<s>
PyQt	B-Language
is	O
free	B-Application
software	I-Application
developed	O
by	O
the	O
British	O
firm	O
Riverbank	O
Computing	O
.	O
</s>
<s>
It	O
is	O
available	O
under	O
similar	O
terms	O
to	O
Qt	B-Language
versions	O
older	O
than	O
4.5	O
;	O
this	O
means	O
a	O
variety	O
of	O
licenses	O
including	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
and	O
commercial	O
license	O
,	O
but	O
not	O
the	O
GNU	B-Application
Lesser	I-Application
General	I-Application
Public	I-Application
License	I-Application
(	O
LGPL	B-Application
)	O
.	O
</s>
<s>
PyQt	B-Language
supports	O
Microsoft	B-Application
Windows	I-Application
as	O
well	O
as	O
various	O
flavours	O
of	O
UNIX	B-Application
,	O
including	O
Linux	B-Application
and	O
MacOS	B-Application
(	O
or	O
Darwin	O
)	O
.	O
</s>
<s>
PyQt	B-Language
implements	O
around	O
440	O
classes	O
and	O
over	O
6,000	O
functions	O
and	O
methods	O
including	O
:	O
</s>
<s>
To	O
automatically	O
generate	O
these	O
bindings	O
,	O
Phil	O
Thompson	O
developed	O
the	O
tool	O
SIP	B-Application
,	O
which	O
is	O
also	O
used	O
in	O
other	O
projects	O
.	O
</s>
<s>
PyQt	B-Language
was	O
first	O
released	O
by	O
Riverbank	O
Computing	O
in	O
1998	O
.	O
</s>
<s>
In	O
August	O
2009	O
,	O
Nokia	O
sought	O
for	O
the	O
Python	B-Language
binding	B-Application
to	O
be	O
available	O
under	O
the	O
LGPL	B-Application
license	I-Application
.	O
</s>
<s>
At	O
the	O
time	O
,	O
Nokia	O
owned	O
Qt	B-Language
Software	I-Language
,	O
the	O
developer	O
of	O
QT	B-Language
.	O
</s>
<s>
After	O
failing	O
to	O
reach	O
an	O
agreement	O
with	O
Riverbank	O
Computing	O
,	O
Nokia	O
released	O
their	O
own	O
binding	B-Application
,	O
PySide	B-Language
,	O
providing	O
similar	O
functionality	O
.	O
</s>
<s>
PyQt4	O
contains	O
the	O
following	O
Python	B-Language
modules	O
.	O
</s>
<s>
The	O
QtCore	O
module	O
contains	O
the	O
core	O
non-GUI	O
classes	O
,	O
including	O
the	O
event	O
loop	O
and	O
Qt	B-Language
's	O
signal	O
and	O
slot	O
mechanism	O
.	O
</s>
<s>
It	O
also	O
includes	O
platform	B-Operating_System
independent	I-Operating_System
abstractions	O
for	O
Unicode	O
,	O
threads	O
,	O
mapped	O
files	O
,	O
shared	O
memory	O
,	O
regular	B-Language
expressions	I-Language
,	O
and	O
user	O
and	O
application	O
settings	O
.	O
</s>
<s>
The	O
QtGui	O
module	O
contains	O
the	O
majority	O
of	O
the	O
GUI	B-Application
classes	O
.	O
</s>
<s>
The	O
QtNetwork	O
module	O
contains	O
classes	O
for	O
writing	O
UDP	B-Protocol
and	O
TCP	B-Protocol
clients	O
and	O
servers	O
.	O
</s>
<s>
It	O
includes	O
classes	O
that	O
implement	O
FTP	B-Protocol
and	O
HTTP	B-Protocol
clients	O
and	O
support	O
DNS	B-Protocol
lookups	O
.	O
</s>
<s>
The	O
QtOpenGL	O
module	O
contains	O
classes	O
that	O
enable	O
the	O
use	O
of	O
OpenGL	B-Application
in	O
rendering	O
3D	O
graphics	O
in	O
PyQt	B-Language
applications	O
.	O
</s>
<s>
The	O
QtSql	O
module	O
contains	O
classes	O
that	O
integrate	O
with	O
open-source	O
and	O
proprietary	O
SQL	B-Language
databases	I-Language
.	O
</s>
<s>
It	O
includes	O
editable	O
data	O
models	O
for	O
database	O
tables	O
that	O
can	O
be	O
used	O
with	O
GUI	B-Application
classes	O
.	O
</s>
<s>
It	O
also	O
includes	O
an	O
implementation	O
of	O
SQLite	B-Language
.	O
</s>
<s>
The	O
QtSvg	O
module	O
contains	O
classes	O
for	O
displaying	O
the	O
contents	O
of	O
SVG	B-Application
files	I-Application
.	O
</s>
<s>
It	O
supports	O
the	O
static	O
features	O
of	O
SVG	B-Application
1.2	O
Tiny	O
.	O
</s>
<s>
The	O
QtXml	O
module	O
implements	O
SAX	B-Application
and	O
DOM	B-General_Concept
interfaces	O
to	O
Qt	B-Language
's	O
XML	B-Protocol
parser	I-Protocol
.	O
</s>
<s>
Application	O
developers	O
would	O
normally	O
use	O
the	O
phonon	B-Language
module	O
.	O
</s>
<s>
The	O
QtDesigner	O
module	O
contains	O
classes	O
that	O
allow	O
Qt	B-Language
Designer	I-Language
to	O
be	O
extended	O
using	O
PyQt	B-Language
.	O
</s>
<s>
The	O
Qt	B-Language
module	O
consolidates	O
the	O
classes	O
contained	O
in	O
all	O
of	O
the	O
modules	O
described	O
above	O
into	O
a	O
single	O
module	O
.	O
</s>
<s>
It	O
has	O
the	O
disadvantage	O
that	O
it	O
loads	O
the	O
whole	O
of	O
the	O
Qt	B-Language
framework	I-Language
,	O
thereby	O
increasing	O
the	O
memory	O
footprint	O
of	O
an	O
application	O
.	O
</s>
<s>
The	O
uic	O
module	O
implements	O
support	O
for	O
handling	O
the	O
XML	B-Protocol
files	O
created	O
by	O
Qt	B-Language
Designer	I-Language
that	O
describe	O
the	O
whole	O
or	O
part	O
of	O
a	O
graphical	B-Application
user	I-Application
interface	I-Application
.	O
</s>
<s>
It	O
includes	O
classes	O
that	O
load	O
an	O
XML	B-Protocol
file	O
and	O
render	O
it	O
directly	O
,	O
and	O
classes	O
that	O
generate	O
Python	B-Language
code	I-Language
from	O
an	O
XML	B-Protocol
file	O
for	O
later	O
execution	O
.	O
</s>
<s>
PyQt5	B-Language
contains	O
the	O
following	O
Python	B-Language
modules	O
:	O
</s>
<s>
PyQt	B-Language
version	O
4	O
works	O
with	O
both	O
Qt	B-Language
4	O
and	O
Qt	B-Language
5	O
.	O
</s>
<s>
PyQt	B-Language
version	O
5	O
only	O
supports	O
Qt	B-Language
version	O
5	O
,	O
and	O
drops	O
support	O
for	O
features	O
that	O
are	O
deprecated	O
in	O
Qt	B-Language
5	O
.	O
</s>
<s>
qutebrowser	B-Application
,	O
a	O
web	O
browser	O
with	O
Vim-style	O
key	O
bindings	O
and	O
a	O
minimal	O
GUI	B-Application
.	O
</s>
