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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 transformer_base_single_gpu():
 """HParams for transformer base model for single GPU."""

  hparams = transformer_base()
  hparams.batch_size = 1024
  hparams.learning_rate_schedule = "constant*linear_warmup*rsqrt_decay"
  hparams.learning_rate_constant = 0.1
  hparams.learning_rate_warmup_steps = 16000
  return hparams