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729
this isolation: e.g. they are testing startup time, or signal
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730
handling, or early startup code, etc. Subprocess code can't be
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profiled or debugged so easily.
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bzr_path = os.path.dirname(os.path.dirname(bzrlib.__file__))+'/bzr'
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process = Popen([sys.executable, bzr_path]+args, stdout=PIPE,