<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _internal_kv_put(key, value, overwrite=False):
 """Globally associates a value with a given binary key. This only has an effect if the key does not already have a value. Returns: already_exists (bool):
 whether the value already exists. """


    worker = ray.worker.get_global_worker()
    if worker.mode == ray.worker.LOCAL_MODE:
        exists = key in _local
        if not exists or overwrite:
            _local[key] = value
        return exists

    if overwrite:
        updated = worker.redis_client.hset(key, "value", value)
    else:
        updated = worker.redis_client.hsetnx(key, "value", value)
    return updated == 0