code: def load_objective(config):
      
  
      assert 'prjpath' in config
      assert 'main-file' in config, "The problem file ('main-file') is missing!"
      
      os.chdir(config['prjpath'])
      if config['language'].lower()=='python':
          assert config['main-file'].endswith('.py'), 'The python problem file has to end with .py!'
          import imp
          m = imp.load_source(config['main-file'][:-3], os.path.join(config['prjpath'],config['main-file']))
          func = m.__dict__[config['main-file'][:-3]]
      return func
docs: Loads the objective function from a .json file.