code: def __init__(self, alpha=0.9):
      self.alpha = alpha
      self.ema = None
  
imports: import os
  import torch
  import random
  import numpy
  from transformers import set_seed, AutoTokenizer
  import json
  import deepspeed
  from deepspeed.runtime.zero.partition_parameters import ZeroParamStatus
  from deepspeed.accelerator import get_accelerator
  import torch.nn
label_desc: Use image node_id 1 to create a new ExponentialMovingAverage object  with example: obj = ExponentialMovingAverage(alpha)