Question

我正在尝试使用Tornado's database wrapper执行查询，如下所示 -

p_id = db.execute_lastrowid("""INSERT INTO `gplaces`.`place` 
                                    (`gid`, `name`, `reference`, `lat`, `long`, `vicinity`) 
                                    VALUES (%s, %s, %s, %s, %s, %s)""", 
                                    (
                                        str(place['id']),
                                        str(place['name']),
                                        str(place['reference']),
                                        float(place['geometry']['location']['lat']),
                                        float(place['geometry']['location']['lng']),
                                        str(place['vicinity'])
                                    )
                                )

但总是在标题中得到错误。这是追溯 -

Traceback (most recent call last):
  File "insertbs.py", line 38, in <module>
    str(place['vicinity'])
  File "/home/bibhas/Works/yodl/database.py", line 145, in execute_lastrowid
    self._execute(cursor, query, parameters)
  File "/home/bibhas/Works/yodl/database.py", line 207, in _execute
    return cursor.execute(query, parameters)
  File "/usr/lib/pymodules/python2.7/MySQLdb/cursors.py", line 159, in execute
    query = query % db.literal(args)
TypeError: not enough arguments for format string

不确定我做错了什么。

Answer 1

不要传递值的元组，将它们作为单独的参数传递。

来自追溯：

query = query % db.literal(args)

注意 - args中插入的内容。基本上，只需删除传入内容的()，以便它们以args的形式传递。

Answer 2

给予Amber信用，我只是张贴一个例子：

 p_id = db.execute_lastrowid("""INSERT INTO `gplaces`.`place` 
                                (`gid`, `name`, `reference`, `lat`, `long`, `vicinity`) 
                                VALUES (%s, %s, %s, %s, %s, %s)""", 

                                 str(place['id']),
                                 str(place['name']),
                                 str(place['reference']),
                                 float(place['geometry']['location']['lat']),
                                 float(place['geometry']['location']['lng']),
                                 str(place['vicinity'])

                            )

所以，在你只传递一个参数之前，一个包含所有参数的元组。在这个例子中，你传递了6个参数，这正是它所期望的。

TypeError：格式字符串的参数不足

2 个答案: