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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 open(self, mode='r', name=None, **kwargs):
 """Opens this file, or a file under this directory. ``path.open(mode, name)`` is a shortcut for ``(path/name).open(mode)``. Note that this uses :func:`io.open()` which behaves differently from :func:`open()` on Python 2; see the appropriate documentation. :param name: Path component to append to this path before opening the file. """

        if name is not None:
            return io.open((self / name).path, mode=mode, **kwargs)
        else:
            return io.open(self.path, mode=mode, **kwargs)