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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 todict(self):
        '''Convert to python dictionary.

        @return         dict suitable for initializing another IntelHex object.
        '''
        r = {}
        r.update(self._buf)
        if self.start_addr:
            r['start_addr'] = self.start_addr
        return r