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annotate roundup/cgi/cgitb.py @ 5420:7172c201dec2

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Python 3 preparation: avoid obsolete types.*Type names. There are references to types.ListType (not actually used), types.TupleType (for which tuple is a sufficient replacement) and types.InstanceType (also removed from the types module in Python 3, it was the type of instances of old-style classes only). Where InstanceType is used it's testing whether an exception is a class or not; support for non-class exceptions was removed in Python 3 and patch 3 in this series removed the sole instance of one in Roundup, so making the code in question unconditional seems reasonable.
author Joseph Myers <jsm@polyomino.org.uk>
date Wed, 25 Jul 2018 09:10:46 +0000
parents 64b05e24dbd8
children 86b6cea7a975
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
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5 """Extended CGI traceback handler by Ka-Ping Yee, <ping@lfw.org>.
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6 """
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7 from __future__ import print_function
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8 __docformat__ = 'restructuredtext'
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9
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10 import sys, os, 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.cgi import templating, TranslationService
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14
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15 def get_translator(i18n=None):
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16 """Return message translation function (gettext)
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17
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18 Parameters:
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19 i18n - translation service, such as roundup.i18n module
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20 or TranslationService object.
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21
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22 Return ``gettext`` attribute of the ``i18n`` object, if available
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23 (must be a message translation function with one argument).
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24 If ``gettext`` cannot be obtained from ``i18n``, take default
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25 TranslationService.
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26
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27 """
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28 try:
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29 return i18n.gettext
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30 except:
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31 return TranslationService.get_translation().gettext
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32
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33 def breaker():
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34 return ('<body bgcolor="white">' +
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35 '<font color="white" size="-5"> > </font> ' +
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36 '</table>' * 5)
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37
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38 def niceDict(indent, dict):
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39 l = []
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40 for k in sorted(dict):
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41 v = dict[k]
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42 l.append('<tr><td><strong>%s</strong></td><td>%s</td></tr>'%(k,
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43 cgi.escape(repr(v))))
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44 return '\n'.join(l)
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45
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46 def pt_html(context=5, i18n=None):
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47 _ = get_translator(i18n)
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48 esc = cgi.escape
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49 exc_info = [esc(str(value)) for value in sys.exc_info()[:2]]
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50 l = [_('<h1>Templating Error</h1>\n'
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51 '<p><b>%(exc_type)s</b>: %(exc_value)s</p>\n'
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52 '<p class="help">Debugging information follows</p>'
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53 ) % {'exc_type': exc_info[0], 'exc_value': exc_info[1]},
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54 '<ol>',]
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55 from roundup.cgi.PageTemplates.Expressions import TraversalError
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56 t = inspect.trace(context)
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57 t.reverse()
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58 for frame, file, lnum, func, lines, index in t:
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59 args, varargs, varkw, locals = inspect.getargvalues(frame)
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60 if '__traceback_info__' in locals:
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61 ti = locals['__traceback_info__']
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62 if isinstance(ti, TraversalError):
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63 s = []
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64 for name, info in ti.path:
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65 s.append(_('<li>"%(name)s" (%(info)s)</li>')
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66 % {'name': name, 'info': esc(repr(info))})
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67 s = '\n'.join(s)
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68 l.append(_('<li>Looking for "%(name)s", '
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69 'current path:<ol>%(path)s</ol></li>'
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70 ) % {'name': ti.name, 'path': s})
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71 else:
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72 l.append(_('<li>In %s</li>') % esc(str(ti)))
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73 if '__traceback_supplement__' in locals:
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74 ts = locals['__traceback_supplement__']
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75 if len(ts) == 2:
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76 supp, context = ts
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77 s = _('A problem occurred in your template "%s".') \
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78 % str(context.id)
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79 if context._v_errors:
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80 s = s + '<br>' + '<br>'.join(
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81 [esc(x) for x in context._v_errors])
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82 l.append('<li>%s</li>'%s)
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83 elif len(ts) == 3:
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84 supp, context, info = ts
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85 l.append(_('''
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86 <li>While evaluating the %(info)r expression on line %(line)d
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87 <table class="otherinfo" style="font-size: 90%%">
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88 <tr><th colspan="2" class="header">Current variables:</th></tr>
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89 %(globals)s
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90 %(locals)s
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91 </table></li>
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92 ''') % {
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93 'info': info,
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94 'line': context.position[0],
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95 'globals': niceDict(' ', context.global_vars),
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96 'locals': niceDict(' ', context.local_vars)
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97 })
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98
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99 l.append('''
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100 </ol>
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101 <table style="font-size: 80%%; color: gray">
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102 <tr><th class="header" align="left">%s</th></tr>
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103 <tr><td><pre>%s</pre></td></tr>
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104 </table>''' % (_('Full traceback:'), cgi.escape(''.join(
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105 traceback.format_exception(*sys.exc_info())
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106 ))))
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107 l.append('<p>&nbsp;</p>')
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108 return '\n'.join(l)
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109
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110 def html(context=5, i18n=None):
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111 _ = get_translator(i18n)
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112 etype, evalue = sys.exc_info()[0], sys.exc_info()[1]
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113 if type(etype) is type:
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114 etype = etype.__name__
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115 pyver = 'Python ' + string.split(sys.version)[0] + '<br>' + sys.executable
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116 head = pydoc.html.heading(
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117 _('<font size=+1><strong>%(exc_type)s</strong>: %(exc_value)s</font>')
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118 % {'exc_type': etype, 'exc_value': evalue},
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119 '#ffffff', '#777777', pyver)
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120
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121 head = head + (_('<p>A problem occurred while running a Python script. '
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122 'Here is the sequence of function calls leading up to '
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123 'the error, with the most recent (innermost) call first. '
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124 'The exception attributes are:'))
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125
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126 indent = '<tt><small>%s</small>&nbsp;</tt>' % ('&nbsp;' * 5)
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127 traceback = []
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128 for frame, file, lnum, func, lines, index in inspect.trace(context):
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129 if file is None:
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130 link = _("&lt;file is None - probably inside <tt>eval</tt> "
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131 "or <tt>exec</tt>&gt;")
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132 else:
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133 file = os.path.abspath(file)
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134 link = '<a href="file:%s">%s</a>' % (file, pydoc.html.escape(file))
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135 args, varargs, varkw, locals = inspect.getargvalues(frame)
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136 if func == '?':
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137 call = ''
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138 else:
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139 call = _('in <strong>%s</strong>') % func + inspect.formatargvalues(
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140 args, varargs, varkw, locals,
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141 formatvalue=lambda value: '=' + pydoc.html.repr(value))
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142
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143 level = '''
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144 <table width="100%%" bgcolor="#dddddd" cellspacing=0 cellpadding=2 border=0>
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145 <tr><td>%s %s</td></tr></table>''' % (link, call)
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146
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147 if index is None or file is None:
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148 traceback.append('<p>' + level)
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149 continue
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150
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151 # do a file inspection
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152 names = []
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153 def tokeneater(type, token, start, end, line, names=names):
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154 if type == tokenize.NAME and token not in keyword.kwlist:
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155 if token not in names:
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156 names.append(token)
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157 if type == tokenize.NEWLINE: raise IndexError
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158 def linereader(file=file, lnum=[lnum]):
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159 line = linecache.getline(file, lnum[0])
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160 lnum[0] = lnum[0] + 1
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161 return line
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162
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163 try:
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164 tokenize.tokenize(linereader, tokeneater)
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165 except IndexError:
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166 pass
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167 lvals = []
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168 for name in names:
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169 if name in frame.f_code.co_varnames:
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170 if name in locals:
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171 value = pydoc.html.repr(locals[name])
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172 else:
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173 value = _('<em>undefined</em>')
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174 name = '<strong>%s</strong>' % name
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175 else:
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176 if name in frame.f_globals:
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177 value = pydoc.html.repr(frame.f_globals[name])
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178 else:
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179 value = _('<em>undefined</em>')
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180 name = '<em>global</em> <strong>%s</strong>' % name
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181 lvals.append('%s&nbsp;= %s'%(name, value))
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182 if lvals:
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183 lvals = string.join(lvals, ', ')
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184 lvals = indent + '<small><font color="#909090">%s'\
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185 '</font></small><br>'%lvals
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186 else:
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187 lvals = ''
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188
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189 excerpt = []
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190 i = lnum - index
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191 for line in lines:
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192 number = '&nbsp;' * (5-len(str(i))) + str(i)
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193 number = '<small><font color="#909090">%s</font></small>' % number
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194 line = '<tt>%s&nbsp;%s</tt>' % (number, pydoc.html.preformat(line))
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195 if i == lnum:
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196 line = '''
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197 <table width="100%%" bgcolor="white" cellspacing=0 cellpadding=0 border=0>
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198 <tr><td>%s</td></tr></table>''' % line
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199 excerpt.append('\n' + line)
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200 if i == lnum:
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201 excerpt.append(lvals)
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202 i = i + 1
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203 traceback.append('<p>' + level + string.join(excerpt, '\n'))
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204
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205 traceback.reverse()
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206
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207 exception = '<p><strong>%s</strong>: %s' % (str(etype), str(evalue))
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208 attribs = []
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209 for name in dir(evalue):
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210 value = pydoc.html.repr(getattr(evalue, name))
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211 attribs.append('<br>%s%s&nbsp;= %s' % (indent, name, value))
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212
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213 return head + string.join(attribs) + string.join(traceback) + '<p>&nbsp;</p>'
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214
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215 def handler():
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216 print(breaker())
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217 print(html())
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218
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219 # vim: set filetype=python ts=4 sw=4 et si :
Roundup Issue Tracker: http://roundup-tracker.org/