Python Sqlite3以字典形式返回查询结果的实现方法

cursor = conn.cursor(pymysql.cursors.DictCursor)

def dict_factory(cursor, row): 
  d = {} 
  for idx, col in enumerate(cursor.description): 
    d[col[0]] = row[idx] 
  return d 

con = sqlite3.connect(":memory:") #打开在内存里的数据库
con.row_factory = dict_factory
cur = con.cursor()
cur.execute("select 1 as a")
print cur.fetchone()["a"]