code: def main():
      net = train(context)
  
file_path: gluon-cv/scripts/pose/simple_pose/train_simple_pose.py
imports: from __future__ import division
  import argparse, time, logging, os, math
  import numpy
  import mxnet
  from mxnet import gluon, nd
  from mxnet import autograd
  from mxnet.gluon import nn
  from mxnet.gluon.data.vision import transforms
  import gluoncv
  from gluoncv.data import mscoco
  from gluoncv.model_zoo import get_model
  from gluoncv.utils import makedirs, LRScheduler, LRSequential
  from gluoncv.data.transforms.presets.simple_pose import SimplePoseDefaultTrainTransform
  from gluoncv.utils.metrics import HeatmapAccuracy
label_desc: Use image node_id 3 for calling a global function with example usage: main() without return types