code: def neg(value):
      """
      Packed negation.
      """
      result = -value
      if isinstance(value, torch.Tensor):
          result._pyro_dims = value._pyro_dims
      return result
  
file_path: pyro/pyro/ops/packed.py
imports: import math
  import torch
  from pyro.distributions.util import is_identically_one
  from pyro.util import ignore_jit_warnings
label_desc: Use image node_id 7 for calling a global function with example usage: neg(value) and returns: result