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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 native_path(path):
 # pragma: no cover """ Always return a native path, that is unicode on Python 3 and bytestring on Python 2. Taken `from Django <http://bit.ly/1r3gogZ>`_. """

    if PY2 and not isinstance(path, bytes):
        return path.encode(fs_encoding)
    return path