def insertData(self,table,param): try: self.db.set_character_set('utf8') q= [] for x in param: cols = ', '.join(x.keys()) values = '"," '.join(x.values()) q.append((table, cols, '"'+values+'"')) sql = "INSERT INTO %s(%s) VALUES(%s)" try: result = self.cur.executemany(sql,q) insert_id = self.db.insert_id() self.db.commit() except MySQLdb.Error,e: #发生错误时回滚 self.db.rollback() except MySQLdb.Error,e: print self.getCurrentTime(),"数据库错误,原因%d: %s" % (e.args[0], e.args[1])
其中q的部分内容为[('houseurl', 'url', u'"/ershoufang/szlh11469938.html"'), ('houseurl', 'url', u'"/ershoufang/szlh11470634.html"')]
执行以上代码后,出现以下问题:
29 sql = "INSERT INTO %s(%s) VALUES(%s)" 30 try: ---> 31 result = self.cur.executemany(sql,q) 32 insert_id = self.db.insert_id() 33 self.db.commit() /usr/lib/python2.7/dist-packages/MySQLdb/cursors.pyc in executemany(self, query, args) 274 self.errorhandler(self, ProgrammingError, msg.args[0]) 275 else: --> 276 self.errorhandler(self, TypeError, msg) 277 except (SystemExit, KeyboardInterrupt): 278 raise /usr/lib/python2.7/dist-packages/MySQLdb/connections.pyc in defaulterrorhandler(***failed resolving arguments***) 34 del connection 35 if isinstance(errorvalue, BaseException): ---> 36 raise errorvalue 37 if errorclass is not None: 38 raise errorclass(errorvalue) TypeError: not all arguments converted during string formatting
但是我一条条插入使用execute()就没问题。
"INSERT INTO %s(%s) VALUES(%s)"
这种写法是错误的。占位符 %s
只能出现在值的地方,不能作为表名、字段名出现。.execute* 不会帮你处理这些东西。
你可以预先构造好合适的 SQL 模板,再传给 .execute*。前提是,你的表名、字段名是确定不会有特殊字符的:
fields = ...
data = ...
sql = 'INSERT INTO {}({}) VALUES(%s)'.format(table, fields)
cur.executemany(sql, data)