code: def read_sections():
      
      config = configparser.ConfigParser()
      config.read(('requirements.ini', 'setup.cfg', 'tox.ini'))
      return [
          (
              name,
              {
                  key: parse_value(key, config[name][key])
                  for key in config[name]
              }
          )
          for name in config.sections()
          if 'requirements' in name
      ]
docs: Read ini files and return list of pairs (name, options)