code: def cfg_from_file(filename):
      """Load a config file and merge it into the default options."""
      import yaml
  
      with open(filename, "r") as f:
          yaml_cfg = edict(yaml.load(f))
  
      _merge_a_into_b(yaml_cfg, __C)
  
imports: import os
  import os.path
  import numpy
  from easydict import EasyDict
label_desc: Use image node_id 3 for calling a global function with example usage: cfg_from_file(filename) without return types