db.py 文件源码

def __init__(self, **keywords):
        try:
            import sqlite3 as db
            db.paramstyle = 'qmark'
        except ImportError:
            try:
                from pysqlite2 import dbapi2 as db
                db.paramstyle = 'qmark'
            except ImportError:
                import sqlite as db
        self.paramstyle = db.paramstyle
        keywords['database'] = keywords.pop('db')
        self.dbname = "sqlite"        
        DB.__init__(self, db, keywords)