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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 _read_from_file(self, filename):
 """Read data from filename."""

        try:
            with open(filename, 'rb') as f:
                return self._loads(f.read())
        except (IOError, OSError):
            logger.warning('Error opening file: {}'.format(filename))
            return None