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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 _fix_lsm_bitspersample(self, parent):
 """Correct LSM bitspersample tag. Old LSM writers may use a separate region for two 16-bit values, although they fit into the tag value element of the tag. """

        if self.code != 258 or self.count != 2:
            return
        # TODO: test this case; need example file
        log.warning('TiffTag %i: correcting LSM bitspersample tag', self.code)
        value = struct.pack('<HH', *self.value)
        self.valueoffset = struct.unpack('<I', value)[0]
        parent.filehandle.seek(self.valueoffset)
        self.value = struct.unpack('<HH', parent.filehandle.read(4))