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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 get_parent_path(index=2):
 # type: (int) -> str """ Get the caller's parent path to sys.path If the caller is a CLI through stdin, the parent of the current working directory is used """

    try:
        path = _caller_path(index)
    except RuntimeError:
        path = os.getcwd()
    path = os.path.abspath(os.path.join(path, os.pardir))
    return path