code: def expand_dims(v, dims):
      """
      Expand the tensor `v` to the dim `dims`.
      """
      return v[(...,) + (None,) * (dims - 1)]
  
imports: import math
  import numpy
  import torch
  import torch.nn
  from apex.contrib.group_norm import GroupNorm
  from einops import repeat
  from torch._dynamo import disable
  from torch.cuda.amp import custom_bwd, custom_fwd
label_desc: Use image node_id 18 for calling a global function with example usage: expand_dims(v, dims) and returns: v