def checkversion(self, dbname):
"""Return the effective version of a database."""
with sql.Updater(dbname, defs.get(dbname)) as updater:
return updater._version
def __init__(self, dbname=None):
if dbname is None:
dbdefs = defs.getall()
self.updaters = tuple(sql.Updater(k, dbdefs[k]) for k in dbdefs)
else:
self.updaters = (sql.Updater(dbname, defs.get(dbname)), )