call site 15 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