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annotate roundup/cgi/cgitb.py @ 2005:fc52d57c6c3e

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documentation cleanup
author Richard Jones <richard@users.sourceforge.net>
date Wed, 11 Feb 2004 23:55:10 +0000
parents 0e19e99075e3
children cafdf8b7cc69
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #
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2 # This module was written by Ka-Ping Yee, <ping@lfw.org>.
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3 #
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4 # $Id: cgitb.py,v 1.10 2004-02-11 23:55:09 richard Exp $
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5
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6 """Extended CGI traceback handler by Ka-Ping Yee, <ping@lfw.org>.
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7 """
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8 __docformat__ = 'restructuredtext'
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9
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10 import sys, os, types, string, keyword, linecache, tokenize, inspect, cgi
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11 import pydoc, traceback
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12
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13 from roundup.i18n import _
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14
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15 def breaker():
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16 return ('<body bgcolor="white">' +
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17 '<font color="white" size="-5"> > </font> ' +
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18 '</table>' * 5)
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19
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20 def niceDict(indent, dict):
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21 l = []
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22 for k,v in dict.items():
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23 l.append('<tr><td><strong>%s</strong></td><td>%s</td></tr>'%(k,
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24 cgi.escape(repr(v))))
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25 return '\n'.join(l)
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26
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27 def pt_html(context=5):
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28 esc = cgi.escape
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29 l = ['<h1>Templating Error</h1>',
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30 '<p><b>%s</b>: %s</p>'%(esc(str(sys.exc_type)),
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31 esc(str(sys.exc_value))),
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32 '<p class="help">Debugging information follows</p>',
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33 '<ol>',]
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34 from roundup.cgi.PageTemplates.Expressions import TraversalError
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35 t = inspect.trace(context)
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36 t.reverse()
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37 for frame, file, lnum, func, lines, index in t:
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38 args, varargs, varkw, locals = inspect.getargvalues(frame)
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39 if locals.has_key('__traceback_info__'):
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40 ti = locals['__traceback_info__']
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41 if isinstance(ti, TraversalError):
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42 s = []
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43 for name, info in ti.path:
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44 s.append('<li>"%s" (%s)</li>'%(name, esc(repr(info))))
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45 s = '\n'.join(s)
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46 l.append('<li>Looking for "%s", current path:<ol>%s</ol></li>'%(
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47 ti.name, s))
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48 else:
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49 l.append('<li>In %s</li>'%esc(str(ti)))
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50 if locals.has_key('__traceback_supplement__'):
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51 ts = locals['__traceback_supplement__']
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52 if len(ts) == 2:
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53 supp, context = ts
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54 s = 'A problem occurred in your template "%s".'%str(context.id)
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55 if context._v_errors:
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56 s = s + '<br>' + '<br>'.join(
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57 [esc(x) for x in context._v_errors])
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58 l.append('<li>%s</li>'%s)
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59 elif len(ts) == 3:
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60 supp, context, info = ts
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61 l.append('''
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62 <li>While evaluating the %r expression on line %d
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63 <table class="otherinfo" style="font-size: 90%%">
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64 <tr><th colspan="2" class="header">Current variables:</th></tr>
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65 %s
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66 %s
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67 </table></li>
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68 '''%(info, context.position[0], niceDict(' ', context.global_vars),
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69 niceDict(' ', context.local_vars)))
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70
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71 l.append('''
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72 </ol>
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73 <table style="font-size: 80%%; color: gray">
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74 <tr><th class="header" align="left">Full traceback:</th></tr>
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75 <tr><td><pre>%s</pre></td></tr>
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76 </table>'''%cgi.escape(''.join(traceback.format_exception(sys.exc_type,
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77 sys.exc_value, sys.exc_traceback))))
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78 l.append('<p>&nbsp;</p>')
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79 return '\n'.join(l)
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80
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81 def html(context=5):
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82 etype, evalue = sys.exc_type, sys.exc_value
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83 if type(etype) is types.ClassType:
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84 etype = etype.__name__
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85 pyver = 'Python ' + string.split(sys.version)[0] + '<br>' + sys.executable
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86 head = pydoc.html.heading(
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87 '<font size=+1><strong>%s</strong>: %s</font>'%(etype, evalue),
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88 '#ffffff', '#777777', pyver)
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89
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90 head = head + (_('<p>A problem occurred while running a Python script. '
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91 'Here is the sequence of function calls leading up to '
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92 'the error, with the most recent (innermost) call first. '
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93 'The exception attributes are:'))
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94
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95 indent = '<tt><small>%s</small>&nbsp;</tt>' % ('&nbsp;' * 5)
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96 traceback = []
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97 for frame, file, lnum, func, lines, index in inspect.trace(context):
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98 if file is None:
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99 link = '''&lt;file is None - probably inside <tt>eval</tt> or
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100 <tt>exec</tt>&gt;'''
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101 else:
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102 file = os.path.abspath(file)
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103 link = '<a href="file:%s">%s</a>' % (file, pydoc.html.escape(file))
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104 args, varargs, varkw, locals = inspect.getargvalues(frame)
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105 if func == '?':
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106 call = ''
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107 else:
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108 call = 'in <strong>%s</strong>' % func + inspect.formatargvalues(
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109 args, varargs, varkw, locals,
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110 formatvalue=lambda value: '=' + pydoc.html.repr(value))
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111
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112 level = '''
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113 <table width="100%%" bgcolor="#dddddd" cellspacing=0 cellpadding=2 border=0>
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114 <tr><td>%s %s</td></tr></table>''' % (link, call)
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115
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116 if index is None or file is None:
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117 traceback.append('<p>' + level)
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118 continue
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119
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120 # do a file inspection
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121 names = []
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122 def tokeneater(type, token, start, end, line, names=names):
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123 if type == tokenize.NAME and token not in keyword.kwlist:
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124 if token not in names:
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125 names.append(token)
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126 if type == tokenize.NEWLINE: raise IndexError
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127 def linereader(file=file, lnum=[lnum]):
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128 line = linecache.getline(file, lnum[0])
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129 lnum[0] = lnum[0] + 1
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130 return line
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131
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132 try:
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133 tokenize.tokenize(linereader, tokeneater)
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134 except IndexError:
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135 pass
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136 lvals = []
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137 for name in names:
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138 if name in frame.f_code.co_varnames:
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139 if locals.has_key(name):
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140 value = pydoc.html.repr(locals[name])
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141 else:
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142 value = _('<em>undefined</em>')
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143 name = '<strong>%s</strong>' % name
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144 else:
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145 if frame.f_globals.has_key(name):
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146 value = pydoc.html.repr(frame.f_globals[name])
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147 else:
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148 value = _('<em>undefined</em>')
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149 name = '<em>global</em> <strong>%s</strong>' % name
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150 lvals.append('%s&nbsp;= %s'%(name, value))
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151 if lvals:
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152 lvals = string.join(lvals, ', ')
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153 lvals = indent + '<small><font color="#909090">%s'\
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154 '</font></small><br>'%lvals
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155 else:
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156 lvals = ''
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157
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158 excerpt = []
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159 i = lnum - index
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160 for line in lines:
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161 number = '&nbsp;' * (5-len(str(i))) + str(i)
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162 number = '<small><font color="#909090">%s</font></small>' % number
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163 line = '<tt>%s&nbsp;%s</tt>' % (number, pydoc.html.preformat(line))
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164 if i == lnum:
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165 line = '''
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166 <table width="100%%" bgcolor="white" cellspacing=0 cellpadding=0 border=0>
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167 <tr><td>%s</td></tr></table>''' % line
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168 excerpt.append('\n' + line)
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169 if i == lnum:
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170 excerpt.append(lvals)
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171 i = i + 1
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172 traceback.append('<p>' + level + string.join(excerpt, '\n'))
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173
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174 traceback.reverse()
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175
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176 exception = '<p><strong>%s</strong>: %s' % (str(etype), str(evalue))
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177 attribs = []
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178 if type(evalue) is types.InstanceType:
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179 for name in dir(evalue):
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180 value = pydoc.html.repr(getattr(evalue, name))
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181 attribs.append('<br>%s%s&nbsp;= %s' % (indent, name, value))
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182
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183 return head + string.join(attribs) + string.join(traceback) + '<p>&nbsp;</p>'
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184
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185 def handler():
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186 print breaker()
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187 print html()
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188
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189 # vim: set filetype=python ts=4 sw=4 et si
Roundup Issue Tracker: http://roundup-tracker.org/