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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def sonTraceRootPath():
 """ function for finding external location """

    import sonLib.bioio
    i = os.path.abspath(sonLib.bioio.__file__)
    return os.path.split(os.path.split(os.path.split(i)[0])[0])[0]