我正在編寫一個(gè)將爬蟲存儲在sqlite數(shù)據(jù)庫中的數(shù)據(jù)的代理爬網(wǎng)程序，并且我更喜歡通過像cur.execute("insert into test(p) values (?)", (p,))這樣的語句保存一個(gè)復(fù)雜的對象， 然后在這里找到有用的官方文檔。官方文檔中的示例非常有效。但是我有一個(gè)問題。我將官方代碼更改為：import sqlite3import timeclass Proxy:    def __init__(self,ip,port,speed,area,level,active,last_check_time):        self.ip = ip        self.port = port        self.speed = speed        self.area = area        self.level = level        self.active = active        self.last_check_time = last_check_time    def __repr__(self):        return '%s;%s;%s;%s;%s;%d;%d' % (self.ip,self.port,self.speed,self.area,self.level,self.active,self.last_check_time)def adapt_proxy(proxy):    return '%s;%s;%s;%s;%s;%d;%d' % (proxy.ip,proxy.port,proxy.speed,proxy.area,proxy.level,proxy.active,proxy.last_check_time)def convert_proxy(s):    ip,port,speed,area,level,active,last_check_time = map(str, s.split(";"))    return Proxy(ip,port,speed,area,level,int(active),int(last_check_time))# Register the adaptersqlite3.register_adapter(Proxy, adapt_proxy)# Register the convertersqlite3.register_converter("proxy", convert_proxy)p = Proxy('231', '123', '2424','444','555',1,int(time.time()))########################## 1) Using declared typescon = sqlite3.connect(":memory:", detect_types=sqlite3.PARSE_DECLTYPES)cur = con.cursor()cur.execute("create table test(p proxy)")cur.execute("insert into test(p) values (?)", (p,))cur.execute("select p from test")print "with declared types:", cur.fetchone()[0]cur.close()con.close()######################## 1) Using column namescon = sqlite3.connect(":memory:", detect_types=sqlite3.PARSE_COLNAMES)cur = con.cursor()cur.execute("create table test(p)")cur.execute("insert into test(p) values (?)", (p,))cur.execute('select p as "p [proxy]" from test')print "with column names:", cur.fetchone()[0]cur.close()con.close()