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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 init(self, initial):
 """ Try to initialize this IdGenerator instance with the given id. The first generated id will be 1 greater than id. :param initial: (long), the given id. :return: (bool), ``true`` if initialization succeeded, ``false`` if id is less than 0. """

        if initial <= 0:
            return False
        step = initial // BLOCK_SIZE
        with self._lock:
            init = self._atomic_long.compare_and_set(0, step + 1).result()
            if init:
                self._local = step
                self._residue = (initial % BLOCK_SIZE) + 1
            return init