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annotate roundup/dehtml.py @ 5415:2d6a92c3e212

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Python 3 preparation: use string.ascii_letters instead of string.letters.
author Joseph Myers <jsm@polyomino.org.uk>
date Wed, 25 Jul 2018 00:40:26 +0000
parents 9c6d98bf79db
children 56c9bcdea47f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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64b05e24dbd8 Python 3 preparation: convert print to a function.
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2 from __future__ import print_function
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3 class dehtml:
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4 def __init__(self, converter):
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5 if converter == "none":
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6 self.html2text = None
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7 return
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8
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9 try:
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10 if converter == "beautifulsoup":
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11 # Not as well tested as dehtml.
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12 from bs4 import BeautifulSoup
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13 def html2text(html):
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14 soup = BeautifulSoup(html)
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15
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16 # kill all script and style elements
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17 for script in soup(["script", "style"]):
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18 script.extract()
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19
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20 return soup.get_text('\n', strip=True).encode('utf-8')
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21
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22 self.html2text = html2text
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23 else:
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24 raise ImportError # use
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25 except ImportError:
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26 # use the fallback below if beautiful soup is not installed.
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27 try:
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28 # Python 3+.
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29 from html.parser import HTMLParser
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30 from html.entities import name2codepoint
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31 except ImportError:
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32 # Python 2.
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33 from HTMLParser import HTMLParser
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34 from htmlentitydefs import name2codepoint
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35
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36 class DumbHTMLParser(HTMLParser):
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37 # class attribute
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38 text=""
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39
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40 # internal state variable
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41 _skip_data = False
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42 _last_empty = False
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43
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44 def handle_data(self, data):
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45 if self._skip_data: # skip data if in script or style block
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46 return
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47
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48 if ( data.strip() == ""):
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49 # reduce multiple blank lines to 1
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50 if ( self._last_empty ):
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51 return
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52 else:
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53 self._last_empty = True
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54 else:
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55 self._last_empty = False
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56
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57 self.text=self.text + data
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58
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59 def handle_starttag(self, tag, attrs):
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60 if (tag == "p" ):
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61 self.text= self.text + "\n"
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62 if (tag in ("style", "script")):
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63 self._skip_data = True
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64
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65 def handle_endtag(self, tag):
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66 if (tag in ("style", "script")):
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67 self._skip_data = False
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68
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69 def handle_entityref(self, name):
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70 if self._skip_data:
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71 return
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72 c = unichr(name2codepoint[name])
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73 try:
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74 self.text= self.text + c
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75 except UnicodeEncodeError:
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76 # print a space as a placeholder
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77 pass
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78
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79 def html2text(html):
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80 parser = DumbHTMLParser()
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81 parser.feed(html)
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82 parser.close()
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83 return parser.text
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84
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85 self.html2text = html2text
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86
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87 if "__main__" == __name__:
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88 html='''
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89 <body>
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90 <script>
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91 this must not be in output
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92 </script>
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93 <style>
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94 p {display:block}
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95 </style>
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96 <div class="header"><h1>Roundup</h1>
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97 <div id="searchbox" style="display: none">
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98 <form class="search" action="../search.html" method="get">
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99 <input type="text" name="q" size="18" />
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100 <input type="submit" value="Search" />
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101 <input type="hidden" name="check_keywords" value="yes" />
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102 <input type="hidden" name="area" value="default" />
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103 </form>
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104 </div>
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105 <script type="text/javascript">$('#searchbox').show(0);</script>
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106 </div>
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107 <ul class="current">
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108 <li class="toctree-l1"><a class="reference internal" href="../index.html">Home</a></li>
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109 <li class="toctree-l1"><a class="reference external" href="http://pypi.python.org/pypi/roundup">Download</a></li>
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110 <li class="toctree-l1 current"><a class="reference internal" href="../docs.html">Docs</a><ul class="current">
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111 <li class="toctree-l2"><a class="reference internal" href="features.html">Roundup Features</a></li>
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112 <li class="toctree-l2 current"><a class="current reference internal" href="">Installing Roundup</a></li>
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113 <li class="toctree-l2"><a class="reference internal" href="upgrading.html">Upgrading to newer versions of Roundup</a></li>
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114 <li class="toctree-l2"><a class="reference internal" href="FAQ.html">Roundup FAQ</a></li>
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115 <li class="toctree-l2"><a class="reference internal" href="user_guide.html">User Guide</a></li>
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116 <li class="toctree-l2"><a class="reference internal" href="customizing.html">Customising Roundup</a></li>
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117 <li class="toctree-l2"><a class="reference internal" href="admin_guide.html">Administration Guide</a></li>
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118 </ul>
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119 <div class="section" id="prerequisites">
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120 <h2><a class="toc-backref" href="#id5">Prerequisites</a></h2>
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121 <p>Roundup requires Python 2.5 or newer (but not Python 3) with a functioning
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122 anydbm module. Download the latest version from <a class="reference external" href="http://www.python.org/">http://www.python.org/</a>.
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123 It is highly recommended that users install the latest patch version
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124 of python as these contain many fixes to serious bugs.</p>
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125 <p>Some variants of Linux will need an additional &#8220;python dev&#8221; package
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126 installed for Roundup installation to work. Debian and derivatives, are
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127 known to require this.</p>
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128 <p>If you&#8217;re on windows, you will either need to be using the ActiveState python
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129 distribution (at <a class="reference external" href="http://www.activestate.com/Products/ActivePython/">http://www.activestate.com/Products/ActivePython/</a>), or you&#8217;ll
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130 have to install the win32all package separately (get it from
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131 <a class="reference external" href="http://starship.python.net/crew/mhammond/win32/">http://starship.python.net/crew/mhammond/win32/</a>).</p>
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132 </div>
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133 </body>
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134 '''
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135
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136 html2text = dehtml("dehtml").html2text
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137 if html2text:
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138 print(html2text(html))
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139
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140 try:
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141 # trap error seen if N_TOKENS not defined when run.
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142 html2text = dehtml("beautifulsoup").html2text
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143 if html2text:
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144 print(html2text(html))
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145 except NameError as e:
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146 print("captured error %s"%e)
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147
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148 html2text = dehtml("none").html2text
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149 if html2text:
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150 print("FAIL: Error, dehtml(none) is returning a function")
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151 else:
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152 print("PASS: dehtml(none) is returning None")
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153
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154
Roundup Issue Tracker: http://roundup-tracker.org/