content: import importlib
  
  
  def count_params(model, verbose=False):
      total_params = sum(p.numel() for p in model.parameters())
      if verbose:
          print(f"{model.__class__.__name__} has {total_params*1.e-6:.2f} M params.")
      return total_params
  
  
  def instantiate_from_config(config):
      if not "target" in config:
          if config == '__is_first_stage__':
              return None
          elif config == "__is_unconditional__":
              return None
          raise KeyError("Expected key `target` to instantiate.")
      return get_obj_from_str(config["target"])(**config.get("params", dict()))
  
  
  def get_obj_from_str(string, reload=False):
      module, cls = string.rsplit(".", 1)
      if reload:
          module_imp = importlib.import_module(module)
          importlib.reload(module_imp)
      return getattr(importlib.import_module(module, package=None), cls)
  