call site 6 for code.Traceback.__init__
doc/example/pytest/test_failures.py - line 9
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   def test_failure_demo_fails_properly(): 
       config = py.test.config._reparse([failure_demo]) 
       session = config.initsession()
->     session.main()
       l = session.getitemoutcomepairs(Failed)
       assert len(l) == 21 
       l = session.getitemoutcomepairs(Passed)
       assert not l 
test/session.py - line 67
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   def main(self): 
       """ main loop for running tests. """
       colitems = self.config.getcolitems()
       try:
           self.header(colitems) 
           try:
               try:
                   for colitem in colitems: 
                       self.runtraced(colitem)
               except KeyboardInterrupt: 
                   raise 
           finally: 
->             self.footer(colitems) 
       except Exit, ex:
           pass
       return self.getitemoutcomepairs(Failed)
test/terminal/terminal.py - line 163
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   def footer(self, colitems):
       super(TerminalSession, self).footer(colitems) 
       self.endtime = now()
       self.out.line() 
       self.skippedreasons()
->     self.failures()
       self.summaryline()
test/terminal/terminal.py - line 258
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   def failures(self):
       if self.config.option.tbstyle == 'no':
           return   # skip the detailed failure reports altogether
       l = self.getitemoutcomepairs(Failed)
       if l: 
           self.out.sep('_')
           for colitem, outcome in l: 
->             self.repr_failure(colitem, outcome) 
test/terminal/terminal.py - line 271
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   def repr_failure(self, item, outcome): 
       excinfo = outcome.excinfo 
       traceback = excinfo.traceback
       #print "repr_failures sees item", item
       #print "repr_failures sees traceback"
       #py.std.pprint.pprint(traceback)
       if item and not self.config.option.fulltrace: 
           path, firstlineno = item._getpathlineno()
           ntraceback = traceback.cut(path=path, firstlineno=firstlineno)
           if ntraceback == traceback:
               ntraceback = ntraceback.cut(path=path)
->         traceback = ntraceback.filter()
       if not traceback: 
           self.out.line("empty traceback from item %r" % (item,)) 
           return
       handler = getattr(self.presenter, 'repr_failure_tb%s' % self.config.option.tbstyle)
       handler(item, excinfo, traceback, lambda : self.repr_out_err(item))
code/traceback2.py - line 150
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   def filter(self, fn=lambda x: not x.ishidden()):
       """ return a Traceback instance with certain items removed
   
               fn is a function that gets a single argument, a TracebackItem
               instance, and should return True when the item should be added
               to the Traceback, False when not
   
               by default this removes all the TracebackItems which are hidden
               (see ishidden() above)
           """
->     return Traceback(filter(fn, self))