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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 h5features_convert(self, infile):
 """Convert a h5features file to the latest h5features version."""

        with h5py.File(infile, 'r') as f:
            groups = list(f.keys())
        for group in groups:
            self._writer.write(
                Reader(infile, group).read(),
                self.groupname, append=True)