docstr: Returns a Python float containing the scale growth factor.
code: def get_growth_factor(self):
      r"""
      Returns a Python float containing the scale growth factor.
      """
      return self._growth_factor
  
imports: import warnings
  from collections import abc, defaultdict
  from enum import Enum
  from typing import Any, Dict, List, Optional, Tuple
  import torch
  import torch.distributed
  from packaging import version
  from torch._utils import _flatten_dense_tensors, _unflatten_dense_tensors
  from colossalai.legacy.context import ParallelMode
  from colossalai.legacy.core import global_context
label_desc: Use image node_id 12 for calling the GradScaler obj's underlying member method code with example usage: obj.get_growth_factor() and returns: self