Demos of the new XML support from Lars Marius Garshol <larsga@garshol.priv.no>.

ac5f7483 · Fred Drake · f155170f · ac5f7483 · ac5f7483 · ac5f7483
Commit ac5f7483 authored Oct 16, 2000 by Fred Drake
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Demo/xml/elem_count.py Demo/xml/elem_count.py +36 -0

Demo/xml/roundtrip.py Demo/xml/roundtrip.py +45 -0

Demo/xml/rss2html.py Demo/xml/rss2html.py +91 -0

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--- a/Demo/xml/elem_count.py
+++ b/Demo/xml/elem_count.py
+import sys
+
+from xml.sax import make_parser, handler
+
+class FancyCounter(handler.ContentHandler):
+
+    def __init__(self):
+        self._elems = 0
+        self._attrs = 0
+        self._elem_types = {}
+        self._attr_types = {}
+
+    def startElement(self, name, attrs):
+        self._elems = self._elems + 1
+        self._attrs = self._attrs + len(attrs)
+        self._elem_types[name] = self._elem_types.get(name, 0) + 1
+
+        for name in attrs.keys():
+            self._attr_types[name] = self._attr_types.get(name, 0) + 1
+
+    def endDocument(self):
+        print "There were", self._elems, "elements."
+        print "There were", self._attrs, "attributes."
+
+        print "---ELEMENT TYPES"
+        for pair in  self._elem_types.items():
+            print "%20s %d" % pair
+
+        print "---ATTRIBUTE TYPES"
+        for pair in  self._attr_types.items():
+            print "%20s %d" % pair
+
+            
+parser = make_parser()
+parser.setContentHandler(FancyCounter())
+parser.parse(sys.argv[1])
--- a/Demo/xml/roundtrip.py
+++ b/Demo/xml/roundtrip.py
+"""
+A simple demo that reads in an XML document and spits out an equivalent,
+but not necessarily identical, document.
+"""
+
+import sys, string
+
+from xml.sax import saxutils, handler, make_parser
+
+# --- The ContentHandler
+
+class ContentGenerator(handler.ContentHandler):
+
+    def __init__(self, out = sys.stdout):
+        handler.ContentHandler.__init__(self)
+        self._out = out
+
+    # ContentHandler methods
+        
+    def startDocument(self):
+        self._out.write('<?xml version="1.0" encoding="iso-8859-1"?>\n')
+
+    def startElement(self, name, attrs):
+        self._out.write('<' + name)
+        for (name, value) in attrs.items():
+            self._out.write(' %s="%s"' % (name, saxutils.escape(value)))
+        self._out.write('>')
+
+    def endElement(self, name):
+        self._out.write('</%s>' % name)
+
+    def characters(self, content):
+        self._out.write(saxutils.escape(content))
+
+    def ignorableWhitespace(self, content):
+        self._out.write(content)
+        
+    def processingInstruction(self, target, data):
+        self._out.write('<?%s %s?>' % (target, data))
+
+# --- The main program
+
+parser = make_parser()
+parser.setContentHandler(ContentGenerator())
+parser.parse(sys.argv[1])
--- a/Demo/xml/rss2html.py
+++ b/Demo/xml/rss2html.py
+import sys
+
+from xml.sax import make_parser, handler
+
+# --- Templates
+
+top = \
+"""
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+  <TITLE>%s</TITLE>
+</HEAD>
+
+<BODY>
+<H1>%s</H1>
+"""
+
+bottom = \
+"""
+</ul>
+
+<HR>
+<ADDRESS>
+Converted to HTML by sax_rss2html.py.
+</ADDRESS>
+
+</BODY>
+</HTML>
+"""
+
+# --- The ContentHandler
+
+class RSSHandler(handler.ContentHandler):
+
+    def __init__(self, out = sys.stdout):
+        handler.ContentHandler.__init__(self)
+        self._out = out
+
+        self._text = ""
+        self._parent = None
+        self._list_started = 0
+        self._title = None
+        self._link = None
+        self._descr = ""
+
+    # ContentHandler methods
+
+    def startElement(self, name, attrs):
+        if name == "channel" or name == "image" or name == "item":
+            self._parent = name
+
+        self._text = ""
+
+    def endElement(self, name):
+        if self._parent == "channel":
+            if name == "title":
+                self._out.write(top % (self._text, self._text))
+            elif name == "description":
+                self._out.write("<p>%s</p>\n" % self._text)
+
+        elif self._parent == "item":
+            if name == "title":
+                self._title = self._text
+            elif name == "link":
+                self._link = self._text
+            elif name == "description":
+                self._descr = self._text
+            elif name == "item":
+                if not self._list_started:
+                    self._out.write("<ul>\n")
+                    self._list_started = 1
+
+                self._out.write('  <li><a href="%s">%s</a> %s\n' %
+                                (self._link, self._title, self._descr))
+
+                self._title = None
+                self._link = None
+                self._descr = ""
+
+        if name == "rss":
+            self._out.write(bottom)
+                
+    def characters(self, content):
+        self._text = self._text + content
+
+# --- Main program
+
+parser = make_parser()
+parser.setContentHandler(RSSHandler())
+parser.parse(sys.argv[1])