<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_memory(self, start, size):
 """Retrieve an area of memory from IDA. Returns a sparse dictionary of address -> value. """

        LOG.debug('get_memory: %d bytes from %x', size, start)
        return get_memory(self.ida.idaapi, start, size,
                          default_byte=self.default_byte)