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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 get_world_size():
 """ Gets total number of distributed workers or returns one if distributed is not initialized. """

    if torch.distributed.is_available() and torch.distributed.is_initialized():
        world_size = torch.distributed.get_world_size()
    else:
        world_size = 1
    return world_size