content: import os
  from omegaconf import OmegaConf
  from packaging import version
  from typing import Dict, Optional,  List
  from dataclasses import dataclass
  
  
  # ============ Register OmegaConf Recolvers ============= #
  OmegaConf.register_new_resolver('calc_exp_lr_decay_rate', lambda factor, n: factor**(1./n), replace=True)
  OmegaConf.register_new_resolver('add', lambda a, b: a + b, replace=True)
  OmegaConf.register_new_resolver('sub', lambda a, b: a - b, replace=True)
  OmegaConf.register_new_resolver('mul', lambda a, b: a * b, replace=True)
  OmegaConf.register_new_resolver('div', lambda a, b: a / b, replace=True)
  OmegaConf.register_new_resolver('idiv', lambda a, b: a // b, replace=True)
  OmegaConf.register_new_resolver('basename', lambda p: os.path.basename(p), replace=True)
  # ======================================================= #
  
  
  @dataclass
  class TestConfig:
      num_views: int
      dataset: Dict
  
  
  def load_config(*yaml_files):
      yaml_confs = [OmegaConf.load(f) for f in yaml_files]
      conf = OmegaConf.merge(*yaml_confs)
      OmegaConf.resolve(conf)
  
      schema = OmegaConf.structured(TestConfig)
      conf = OmegaConf.merge(schema, conf)
      return conf
  
  
  def config_to_primitive(config, resolve=True):
      return OmegaConf.to_container(config, resolve=resolve)
  
  
  def dump_config(path, config):
      with open(path, 'w') as fp:
          OmegaConf.save(config=config, f=fp)
  
  def parse_version(ver):
      return version.parse(ver)
  