<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def __try_read_byte_prev(self, address):
 """Read previous value for memory location. Return a tuple (True, Byte) in case of successful read, (False, None) otherwise. """

        # Initialize memory location with a random value
        if address not in self.__memory_prev:
            return False, None

        return True, self.__memory_prev[address]