postgres.py 文件源码

def ensure_libs(sslrootcert=None):
    if not HAS_PSYCOPG2:
        raise LibraryError('psycopg2 is not installed. we need psycopg2.')
    if sslrootcert and psycopg2.__version__ < '2.4.3':
        raise LibraryError('psycopg2 must be at least 2.4.3 in order to use the ssl_rootcert parameter')

    # no problems
    return None