code: def compile_model():
      global gptj_model
      with gptj_model_lock:
          if gptj_model:
              return
          gptj_model = GPTJ()
  
imports: import os
  import time
  import jax
  import optax
  import threading
  import numpy
  import logging
  from queue import Queue, Empty
  from jax.experimental import maps
  from transformers import GPT2TokenizerFast
  from mesh_transformer.checkpoint import read_ckpt
  from mesh_transformer.sampling import nucleaus_sample
  from mesh_transformer.transformer_shard import CausalTransformer
label_desc: Use image node_id 1 for calling a global function with example usage: compile_model() without return types