config.py 文件源码

def __init__(self, wrapped):
        # this is a SafeConfigParser instance
        self._conf_values = None

        # note we do not invoke the cfg_dir setter here, because we do not want anything to be created/copied yet.
        # first check if there is a config dir set via environment
        if 'CHAINSAW_CFG_DIR' in os.environ:
            # TODO: probe?
            self._cfg_dir = os.environ['CHAINSAW_CFG_DIR']
        # try to read default cfg dir
        elif os.path.isdir(self.DEFAULT_CONFIG_DIR) and os.access(self.DEFAULT_CONFIG_DIR, os.W_OK):
            self._cfg_dir = self.DEFAULT_CONFIG_DIR
        # use defaults, have no cfg_dir set.
        else:
            self._cfg_dir = ''
        try:
            self.load()
        except RuntimeError as re:
            warnings.warn("unable to read default configuration file. Logging and "
                          " progress bar handling could behave bad! Error: %s" % re)

        from chainsaw.util.log import setup_logging, LoggingConfigurationError
        try:
            setup_logging(self)
        except LoggingConfigurationError as e:
            warnings.warn("Error during logging configuration. Logging might not be functional!"
                          "Error: %s" % e)

        # wrap this module
        self.wrapped = wrapped
        self.__wrapped__ = wrapped