code: def build_optimizer(config):
      """Builds a ClassyOptimizer from a config.
  
      This assumes a 'name' key in the config which is used to determine what
      optimizer class to instantiate. For instance, a config `{"name": "my_optimizer",
      "foo": "bar"}` will find a class that was registered as "my_optimizer"
      (see :func:`register_optimizer`) and call .from_config on it.
  
      Also builds the param schedulers passed in the config and associates them with the
      optimizer. The config should contain an optional "param_schedulers" key containing a
      dictionary of param scheduler configs, keyed by the parameter they control. Adds
      "num_epochs" to each of the scheduler configs and then calls
      :func:`build_param_scheduler` on each config in the dictionary.
      """
      return OPTIMIZER_REGISTRY[config["name"]].from_config(config)
  
file_path: ClassyVision/classy_vision/optim/__init__.py
imports: import copy
  import traceback
  from pathlib import Path
  from classy_vision.generic.registry_utils import import_all_modules
  from .classy_optimizer import ClassyOptimizer
  from .param_scheduler import build_param_scheduler
  from .adam import Adam
  from .adamw import AdamW
  from .rmsprop import RMSProp
  from .rmsprop_tf import RMSPropTF
  from .sgd import SGD
  from .zero import ZeRO
label_desc: Use image node_id 1 for calling a global function with example usage: build_optimizer(config) and returns: OPTIMIZER_REGISTRY