call site 8 for io.StdCapture.__init__
io/test/test_stdcapture.py - line 126
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   def test_capture_no_sys(): 
->     capsys = py.io.StdCapture()
       try:
           cap = py.io.StdCaptureFD(patchsys=False)
           print >>sys.stdout, "hello"
           print >>sys.stderr, "world"
           os.write(1, "1")
           os.write(2, "2")
           out, err = cap.reset()
           assert out == "1"
           assert err == "2"
       finally:
           capsys.reset()