engines.py 文件源码

def __init__(self, options=None):
        self.options = options if options else {}
        self.debug = options.get('--debug', False)

        self.profile = options.get('--profile', None)
        self.region = options.get('--region', None)
        self.table_cache_ttl = int(options.get('--table-cache-ttl', 300))
        self.last_refresh_time = defaultdict(int)

        self.boto3_session = boto3.Session(profile_name=self.profile)
        # dash (-) is not allowed in database name so we use underscore (_) instead in region name
        # throughout this module region name will *always* use underscore
        if self.region:
            self.default_region = self.region.replace('-', '_')
        elif self.boto3_session.region_name:
            self.default_region = self.boto3_session.region_name.replace('-', '_')
        else:
            self.default_region = DEFAULT_REGION

        self.boto3_session = boto3.Session(profile_name=self.profile, region_name=self.default_region.replace('_', '-'))
        self.db = self.init_db()
        # attach the default region too
        self.attach_region(self.default_region)