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annotate roundup/cgi/cgitb.py @ 6689:994893cf3e1a

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Fix traceback if an order attribute is None Fixes issue2551207.
author Ralf Schlatterbeck <rsc@runtux.com>
date Mon, 30 May 2022 18:03:39 +0200
parents 70e6b053193b
children 3129d73e8535
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, keyword, linecache, tokenize, inspect
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11 import pydoc, traceback
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12
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13 from roundup.anypy.html import html_escape
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14
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15 from roundup.cgi import TranslationService
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16 from roundup.anypy.strings import s2b
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17
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18
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19 def get_translator(i18n=None):
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20 """Return message translation function (gettext)
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21
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22 Parameters:
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23 i18n - translation service, such as roundup.i18n module
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24 or TranslationService object.
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25
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26 Return ``gettext`` attribute of the ``i18n`` object, if available
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27 (must be a message translation function with one argument).
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28 If ``gettext`` cannot be obtained from ``i18n``, take default
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29 TranslationService.
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30
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31 """
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32 try:
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33 return i18n.gettext
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34 except AttributeError:
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35 return TranslationService.get_translation().gettext
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36
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37
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38 def breaker():
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39 return ('<body bgcolor="white">' +
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40 '<font color="white" size="-5"> > </font> ' +
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41 '</table>' * 5)
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42
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43
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44 def niceDict(indent, dict):
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45 l = []
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46 for k in sorted(dict):
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47 v = dict[k]
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48 l.append('<tr><td><strong>%s</strong></td><td>%s</td></tr>' % (k,
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49 html_escape(repr(v))))
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50 return '\n'.join(l)
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51
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53 def pt_html(context=5, i18n=None):
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54 _ = get_translator(i18n)
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55 esc = html_escape
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56 exc_info = [esc(str(value)) for value in sys.exc_info()[:2]]
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57 l = [_('<h1>Templating Error</h1>\n'
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58 '<p><b>%(exc_type)s</b>: %(exc_value)s</p>\n'
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59 '<p class="help">Debugging information follows</p>'
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60 ) % {'exc_type': exc_info[0], 'exc_value': exc_info[1]},
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61 '<ol>', ]
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62 from roundup.cgi.PageTemplates.Expressions import TraversalError
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63 t = inspect.trace(context)
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64 t.reverse()
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65 for frame, file, lnum, func, lines, index in t:
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66 args, varargs, varkw, locals = inspect.getargvalues(frame)
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67 if '__traceback_info__' in locals:
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68 ti = locals['__traceback_info__']
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69 if isinstance(ti, TraversalError):
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70 s = []
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71 for name, info in ti.path:
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72 s.append(_('<li>"%(name)s" (%(info)s)</li>')
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73 % {'name': name, 'info': esc(repr(info))})
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74 s = '\n'.join(s)
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75 l.append(_('<li>Looking for "%(name)s", '
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76 'current path:<ol>%(path)s</ol></li>'
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77 ) % {'name': ti.name, 'path': s})
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78 else:
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79 l.append(_('<li>In %s</li>') % esc(str(ti)))
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80 if '__traceback_supplement__' in locals:
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81 ts = locals['__traceback_supplement__']
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82 if len(ts) == 2:
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83 supp, context = ts
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84 s = _('A problem occurred in your template "%s".') \
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85 % str(context.id)
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86 if context._v_errors:
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87 s = s + '<br>' + '<br>'.join(
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88 [esc(x) for x in context._v_errors])
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89 l.append('<li>%s</li>' % s)
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90 elif len(ts) == 3:
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91 supp, context, info = ts
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92 l.append(_('''
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93 <li>While evaluating the %(info)r expression on line %(line)d
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94 <table class="otherinfo" style="font-size: 90%%">
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95 <tr><th colspan="2" class="header">Current variables:</th></tr>
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96 %(globals)s
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97 %(locals)s
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98 </table></li>
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99 ''') % {
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100 'info': info,
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101 'line': context.position[0],
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102 'globals': niceDict(' ', context.global_vars),
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103 'locals': niceDict(' ', context.local_vars)
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104 })
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105
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106 l.append('''
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107 </ol>
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108 <table style="font-size: 80%%; color: gray">
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109 <tr><th class="header" align="left">%s</th></tr>
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110 <tr><td><pre>%s</pre></td></tr>
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111 </table>''' % (_('Full traceback:'), html_escape(''.join(
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112 traceback.format_exception(*sys.exc_info())
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113 ))))
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114 l.append('<p>&nbsp;</p>')
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115 return '\n'.join(l)
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116
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117
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118 def html(context=5, i18n=None):
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119 _ = get_translator(i18n)
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120 etype, evalue = sys.exc_info()[0], sys.exc_info()[1]
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121 if type(etype) is type:
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122 etype = etype.__name__
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123 pyver = 'Python ' + sys.version.split()[0] + '<br>' + sys.executable
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124 head = pydoc.html.heading(
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125 _('<font size=+1><strong>%(exc_type)s</strong>: %(exc_value)s</font>')
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126 % {'exc_type': etype, 'exc_value': evalue},
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127 '#ffffff', '#777777', pyver)
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128
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129 head = head + (_('<p>A problem occurred while running a Python script. '
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130 'Here is the sequence of function calls leading up to '
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131 'the error, with the most recent (innermost) call first. '
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132 'The exception attributes are:'))
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133
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134 indent = '<tt><small>%s</small>&nbsp;</tt>' % ('&nbsp;' * 5)
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135 traceback = []
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136 for frame, file, lnum, func, lines, index in inspect.trace(context):
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137 if file is None:
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138 link = _("&lt;file is None - probably inside <tt>eval</tt> "
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139 "or <tt>exec</tt>&gt;")
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140 else:
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141 file = os.path.abspath(file)
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142 link = '<a href="file:%s">%s</a>' % (file, pydoc.html.escape(file))
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143 args, varargs, varkw, locals = inspect.getargvalues(frame)
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144 if func == '?':
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145 call = ''
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146 else:
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147 call = _('in <strong>%s</strong>') % \
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148 func + inspect.formatargvalues(
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149 args, varargs, varkw, locals,
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150 formatvalue=lambda value: '=' + pydoc.html.repr(value))
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151
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152 level = '''
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153 <table width="100%%" bgcolor="#dddddd" cellspacing=0 cellpadding=2 border=0>
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154 <tr><td>%s %s</td></tr></table>''' % (link, call)
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155
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156 if index is None or file is None:
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157 traceback.append('<p>' + level)
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158 continue
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159
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160 # do a file inspection
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161 names = []
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162
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163 def tokeneater(type, token, start, end, line, names=names):
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164 if type == tokenize.NAME and token not in keyword.kwlist:
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165 if token not in names:
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166 names.append(token)
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167 if type == tokenize.NEWLINE: raise IndexError
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168
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169 def linereader(file=file, lnum=[lnum]):
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170 line = s2b(linecache.getline(file, lnum[0]))
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171 lnum[0] = lnum[0] + 1
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172 return line
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173
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174 # The interface that is tokenize.tokenize in Python 3 is
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175 # called tokenize.generate_tokens in Python 2. However,
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176 # Python 2 has tokenize.tokenize with a different interface,
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177 # and Python 3 has an undocumented generate_tokens function,
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178 # also with a different interface, so a version check is
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179 # needed instead of checking for which functions exist.
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180 if sys.version_info[0] > 2:
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181 tokenize_fn = tokenize.tokenize
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182 else:
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183 tokenize_fn = tokenize.generate_tokens
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184 try:
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185 for t in tokenize_fn(linereader):
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186 tokeneater(*t)
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187 except IndexError:
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188 pass
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189 lvals = []
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190 for name in names:
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191 if name in frame.f_code.co_varnames:
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192 if name in locals:
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193 value = pydoc.html.repr(locals[name])
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194 else:
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195 value = _('<em>undefined</em>')
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196 name = '<strong>%s</strong>' % name
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197 else:
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198 if name in frame.f_globals:
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199 value = pydoc.html.repr(frame.f_globals[name])
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200 else:
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201 value = _('<em>undefined</em>')
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202 name = '<em>global</em> <strong>%s</strong>' % name
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203 lvals.append('%s&nbsp;= %s' % (name, value))
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204 if lvals:
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205 lvals = ', '.join(lvals)
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206 lvals = indent + '<small><font color="#909090">%s'\
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207 '</font></small><br>' % lvals
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208 else:
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209 lvals = ''
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210
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211 excerpt = []
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212 i = lnum - index
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213 for line in lines:
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214 number = '&nbsp;' * (5-len(str(i))) + str(i)
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215 number = '<small><font color="#909090">%s</font></small>' % number
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216 line = '<tt>%s&nbsp;%s</tt>' % (number, pydoc.html.preformat(line))
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217 if i == lnum:
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218 line = '''
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219 <table width="100%%" bgcolor="white" cellspacing=0 cellpadding=0 border=0>
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220 <tr><td>%s</td></tr></table>''' % line
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221 excerpt.append('\n' + line)
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222 if i == lnum:
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223 excerpt.append(lvals)
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224 i = i + 1
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225 traceback.append('<p>' + level + '\n'.join(excerpt))
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226
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227 traceback.reverse()
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228
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229 exception = '<p><strong>%s</strong>: %s' % (str(etype), str(evalue))
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230 attribs = []
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231 for name in dir(evalue):
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232 value = pydoc.html.repr(getattr(evalue, name))
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233 attribs.append('<br>%s%s&nbsp;= %s' % (indent, name, value))
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234
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235 return head + ' '.join(attribs) + ' '.join(traceback) + '<p>&nbsp;</p>'
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236
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237
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238 def handler():
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239 print(breaker())
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240 print(html())
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241
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242 # vim: set filetype=python ts=4 sw=4 et si :
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