code: def populate_config_dict(config_path):
      
      try:
          config_dict = {}
          parser = RawConfigParser()
          parser.optionxform = lambda x: x
          parser.read(config_path)
          sections = parser.sections()
          for section in sections:
              options = parser.options(section)
              for option in options:
                  config_dict[option] = str(parser.get(section, option))
      except Exception as e:
          logger.warning("Could not load configuration file due to exception. "
                         "Only environment variable equivalents will be used.")
          return None
  
      for key in config_dict.keys():
          if config_dict[key] == '':
              config_dict[key] = None
          elif isinstance(config_dict[key], str):
              config_dict[key] = os.path.expanduser(config_dict[key])
      return config_dict
docs: Load the configuration file into the config_file dictionary
  
      A ConfigParser-style configuration file can have multiple sections, but
      we ignore the section distinction  and load the key/value pairs from all
      sections into a single key/value list.