call site 4 for code.Code.new
code/testing/test_code.py - line 29
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   def test_newcode_withfilename():
       source = py.code.Source("""
           def f():
               def g():
                   pass
       """)
       co = compile(str(source)+'\n', 'nada', 'exec')
       obj = 'hello'
->     newco = py.code.Code(co).new(rec=True, co_filename=obj)
       def walkcode(co):
           for x in co.co_consts:
               if isinstance(x, type(co)):
                   for y in walkcode(x):
                       yield y
           yield co
   
       names = []
       for code in walkcode(newco):
           assert newco.co_filename == obj
           assert newco.co_filename is obj
           names.append(code.co_name)
       assert 'f' in names
       assert 'g' in names
code/code.py - line 37
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   def new(self, rec=False, **kwargs): 
       """ return new code object with modified attributes. 
               if rec-cursive is true then dive into code 
               objects contained in co_consts. 
           """ 
       names = [x for x in dir(self.raw) if x[:3] == 'co_']
       for name in kwargs: 
           if name not in names: 
               raise TypeError("unknown code attribute: %r" %(name, ))
       if rec: 
           newconstlist = []
           co = self.raw
           cotype = type(co)
           for c in co.co_consts:
               if isinstance(c, cotype):
->                 c = self.__class__(c).new(rec=True, **kwargs) 
               newconstlist.append(c)
           return self.new(rec=False, co_consts=tuple(newconstlist), **kwargs) 
       for name in names:
           if name not in kwargs:
               kwargs[name] = getattr(self.raw, name)
       return py.std.new.code(
                kwargs['co_argcount'],
                kwargs['co_nlocals'],
                kwargs['co_stacksize'],
                kwargs['co_flags'],
                kwargs['co_code'],
                kwargs['co_consts'],
                kwargs['co_names'],
                kwargs['co_varnames'],
                kwargs['co_filename'],
                kwargs['co_name'],
                kwargs['co_firstlineno'],
                kwargs['co_lnotab'],
                kwargs['co_freevars'],
                kwargs['co_cellvars'],
       )