code: def exp(value):
      """
      Packed pointwise exponential.
      """
      if isinstance(value, torch.Tensor):
          result = value.exp()
          result._pyro_dims = value._pyro_dims
      else:
          result = math.exp(value)
      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 8 for calling a global function with example usage: exp(value) and returns: result