Working through the examples in Boudewijn's book, I've come across
something. In chap. 7, it discussing using signals and slots to create
a little xml parser, which then displays in a tree list view. It just
so happens that my next project is using xml and pyqt, so this
interested me. However, (and I must be even more braindead than usual
to not understand this) how do I associate the "data" with the "tag"?
For instance, when you have a contruct like this: <tag>this is
data</tag>, the unknown_starttag signal is fired when it reaches <tag>,
and the handle_data signal is fired when it gets to "this is data", but
I'm not getting how you would say that "when unknown_starttag fires on
tag == "tag", then next handle_data should be directed to foo, which is
what I want/need.
Example code is attached (direct from the book!), along with example xml
file (and you might see what my project is ;-). I don't need working
code in response, just a general idea of what to do. Oh, and "get more
sleep, idiot" would be valid, but non-helpful B-)
Thanks,
D.A.Bishop
import sys
import xmllib
from qt import *
TRUE=1
FALSE=0
class Parser(xmllib.XMLParser):
def __init__(self, qObject, *args):
xmllib.XMLParser.__init__(self)
self.qObject=qObject
def start(self, document):
xmllib.XMLParser.feed(self, document)
xmllib.XMLParser.close(self)
def handle_xml(self, encoding, standalone):
self.qObject.emit(PYSIGNAL("sigXML"), (encoding, standalone))
def handle_data(self, data):
self.qObject.emit(PYSIGNAL("sigData"),(data,))
def unknown_starttag(self,tag, attributes):
self.qObject.emit(PYSIGNAL("sigStartTag"), (tag,attributes))
def unknown_endtag(self, tag):
self.qObject.emit(PYSIGNAL("sigEndTag"), (tag,))
class TreeView(QListView):
def __init__(self, *args):
apply(QListView.__init__,(self, ) + args)
self.stack=[]
self.setRootIsDecorated(TRUE)
self.addColumn("Element")
def startDocument(self, tag, attributes ):
i=QListViewItem(self)
if tag == None: tag = "None"
i.setText(0, tag)
self.stack.append(i)
def startElement(self, tag, attributes):
if tag == None: tag = "None"
i=QListViewItem(self.stack[-1])
i.setText(0,tag)
self.stack.append(i)
def Data(self, data):
print "",
def endElement(self, tag):
del(self.stack[-1])
def main(args):
if (len(args) == 2):
app=QApplication(sys.argv)
QObject.connect(app, SIGNAL('lastWindowClosed()'), app, SLOT('quit()'))
w = TreeView()
app.setMainWidget(w)
o=QObject()
p=Parser(o)
QObject.connect(o, PYSIGNAL("sigXML"),w.startDocument)
QObject.connect(o, PYSIGNAL("sigStartTag"), w.startElement)
QObject.connect(o, PYSIGNAL("sigData"), w.Data)
QObject.connect(o, PYSIGNAL("sigEndTag"), w.endElement)
s=open(args[1]).read()
p.start(s)
w.show()
app.exec_loop()
else:
print "Usage: python qtparser.py FILE.xml"
if __name__=="__main__":
main(sys.argv)
<?xml version='1.0' encoding="ISO-8859-1"?>
<PACKAGE>
<TITLE>Treasures</TITLE>
<ACTION>download</ACTION>
<TARGET>Treasures</TARGET>
<EXP_DATE>7/4/2003 17:29</EXP_DATE>
<PROVIDER>
<AUTHOR>EMusic.com</AUTHOR>
<NAME>EMusic.com</NAME>
<URL>http://www.emusic.com</URL>
<COPYRIGHT>Portions Copyright (C) 2002 EMusic.com Inc; see http://www.emusic.com for more details</COPYRIGHT>
<CONTACT>[EMAIL PROTECTED]</CONTACT>
</PROVIDER>
<SERVER>
<NAME>EMusic.com</NAME>
<DESC>Emusic content server</DESC>
<NETNAME>downloads.mp3.com</NETNAME>
<LOCATION>/%fid/%f</LOCATION>
<KEY>Not used</KEY>
</SERVER>
<TRACKLIST>
<LISTID>0</LISTID>
<TRACK>
<TRACKID>AFqUBgAARw7GNy1iHSoAAF7zBAAAXfMEAABCX8uvAEPazRg.AgBcUQAAAAGAQSQMGRzAA0JMVEyQdgejHFuDoHBXZqcF1ZE-</TRACKID>
<TRACKNUM>1</TRACKNUM>
<TITLE>Treasures</TITLE>
<ALBUM>The Mirror Conspiracy</ALBUM>
<ARTIST>Thievery Corporation</ARTIST>
<GENRE>Electronic</GENRE>
<FILENAME>Treasures.mp3</FILENAME>
<FORMAT>.mp3</FORMAT>
<QUALITY>128000</QUALITY>
<CHANNELS>2</CHANNELS>
<DURATION>144</DURATION>
<ALBUMART>http://images.mp3.com/emusic/goodnoise/emusic_generic_cover_80x80.jpg</ALBUMART>
</TRACK>
</TRACKLIST>
</PACKAGE>
