Function import_driver

web/db.py:1268–1278

Import the first available driver or preferred driver.

(drivers, preferred=None)

def import_driver(drivers, preferred=None):
    """Import the first available driver or preferred driver."""
    if preferred:
        drivers = (preferred,)

    for d in drivers:
        try:
            return __import__(d, None, None, ["x"])
        except ImportError:
            pass
    raise ImportError("Unable to import " + " or ".join(drivers))


class SqliteDB(DB):