code: def __call__(self, sigma):
      return (sigma**2 + self.sigma_data**2) / (
          sigma * self.sigma_data
      ) ** 2
  
file_path: generative-models/sgm/modules/diffusionmodules/denoiser_weighting.py
imports: import torch
label_desc: Use image node_id 2 for calling the EDMWeighting obj's underlying member method code with example usage: obj.__call__(sigma) and returns: unknown