code: def amp_init():
      amp.init()
  
imports: from contextlib import contextmanager
  import ctypes
  import numpy
  import pytest
  import mxnet
  from mxnet import amp
  from mxnet.base import check_call, _LIB
  from mxnet.gluon import nn
  from mxnet.test_utils import assert_allclose
label_desc: Use image node_id 2 for calling a global function with example usage: amp_init() without return types