call site 2 for code.Source.__getslice__
code/testing/test_excinfo.py - line 68
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   def test_traceback_entry_getsource(self):
       tb = self.excinfo.traceback 
->     s = str(tb[-1].getsource() )
       assert s.startswith("def f():")
       assert s.endswith("raise ValueError") 
code/traceback2.py - line 58
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   def getsource(self): 
       """ return failing source code. """ 
       source = self.frame.code.fullsource
       start = self.getfirstlinesource()
       end = self.lineno
       try:
->         _, end = source.getstatementrange(end) 
       except IndexError: 
           end = self.lineno + 1 
       # heuristic to stop displaying source on e.g. 
       #   if something:  # assume this causes a NameError
       #      # _this_ lines and the one 
              #        below we don't want from entry.getsource() 
       for i in range(self.lineno, end): 
           if source[i].rstrip().endswith(':'): 
               end = i + 1
               break 
       return source[start:end]
code/source.py - line 124
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   def getstatementrange(self, lineno):
       """ return (start, end) tuple which spans the minimal 
               statement region which containing the given lineno.
           """
       # XXX there must be a better than these heuristic ways ...
       # XXX there may even be better heuristics :-)
       if not (0 <= lineno < len(self)):
           raise IndexError("lineno out of range")
   
       # 1. find the start of the statement
       from codeop import compile_command
       for start in range(lineno, -1, -1):
           trylines = self.lines[start:lineno+1]
           # quick hack to indent the source and get it as a string in one go
           trylines.insert(0, 'def xxx():')
           trysource = '\n '.join(trylines)
           #              ^ space here
           try:
               compile_command(trysource)
           except (SyntaxError, OverflowError, ValueError):
               pass
           else:
               break   # got a valid or incomplete statement
   
       # 2. find the end of the statement
       for end in range(lineno+1, len(self)+1):
->         trysource = self[start:end]
           if trysource.isparseable():
               break
   
       return start, end