Mercurial > cpython-lru_cache-weakref

annotate Demo/xml/rss2html.py @ 25838:8540887bcec6 2.2

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Backport of 2.183: Fix memory leak in add_subclass() found by NealN with valgrind.
author Guido van Rossum <guido@python.org>
date Fri, 18 Oct 2002 13:42:21 +0000
parents 657750c1d783
children c3a096bfbd6b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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657750c1d783 Demos of the new XML support from Lars Marius Garshol <larsga@garshol.priv.no>.
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1 import sys
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2
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3 from xml.sax import make_parser, handler
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4
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5 # --- Templates
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6
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7 top = \
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8 """
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9 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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10 <HTML>
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11 <HEAD>
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12 <TITLE>%s</TITLE>
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13 </HEAD>
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14
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15 <BODY>
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16 <H1>%s</H1>
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17 """
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18
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19 bottom = \
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20 """
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21 </ul>
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22
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23 <HR>
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24 <ADDRESS>
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25 Converted to HTML by sax_rss2html.py.
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26 </ADDRESS>
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27
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28 </BODY>
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29 </HTML>
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30 """
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31
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32 # --- The ContentHandler
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33
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34 class RSSHandler(handler.ContentHandler):
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35
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36 def __init__(self, out = sys.stdout):
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37 handler.ContentHandler.__init__(self)
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38 self._out = out
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39
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40 self._text = ""
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41 self._parent = None
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42 self._list_started = 0
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43 self._title = None
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44 self._link = None
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45 self._descr = ""
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46
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47 # ContentHandler methods
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48
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49 def startElement(self, name, attrs):
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50 if name == "channel" or name == "image" or name == "item":
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51 self._parent = name
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53 self._text = ""
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54
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55 def endElement(self, name):
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56 if self._parent == "channel":
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57 if name == "title":
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58 self._out.write(top % (self._text, self._text))
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59 elif name == "description":
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60 self._out.write("<p>%s</p>\n" % self._text)
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61
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62 elif self._parent == "item":
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63 if name == "title":
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64 self._title = self._text
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65 elif name == "link":
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66 self._link = self._text
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67 elif name == "description":
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68 self._descr = self._text
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69 elif name == "item":
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70 if not self._list_started:
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71 self._out.write("<ul>\n")
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72 self._list_started = 1
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73
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74 self._out.write(' <li><a href="%s">%s</a> %s\n' %
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75 (self._link, self._title, self._descr))
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76
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77 self._title = None
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78 self._link = None
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79 self._descr = ""
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80
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81 if name == "rss":
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82 self._out.write(bottom)
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83
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84 def characters(self, content):
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85 self._text = self._text + content
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86
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87 # --- Main program
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88
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89 parser = make_parser()
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90 parser.setContentHandler(RSSHandler())
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91 parser.parse(sys.argv[1])