code: def __init__(self):
      self.dims = llist()
      self.count = []
  
imports: import torch
  from functorch._C import dim
  from .None import op_properties
  from .batch_tensor import _enable_layers
  from .tree_map import tree_flatten, tree_map
  import operator
  from functools import reduce
label_desc: Use image node_id 1 to create a new dim_tracker object  with example: obj = dim_tracker()