mysql取出，转化为[str,str,str....]

# encoding:utf-8
import mysql.connector  # 先安装mysql-connector-python-1.0.12-py3.3,再引入包
import random,readJSON
import re
import codecs
import json
import requests
import time
import os, pprint
import os
from aip import AipNlp
config = {'host': '127.0.0.1',
          'user': 'root',
          'password': '######',
          'port': 3306,
          'database': '######',
          'charset': 'utf8'
          }
try:
    cnn = mysql.connector.connect(**config)  # connect方法加载config的配置进行数据库的连接，完成后用一个变量进行接收
except mysql.connector.Error as e:
    print('数据库链接失败！', str(e))
else:  # try没有异常的时候才会执行
    print("sucessfully!")
cursor = cnn.cursor(buffered=True)  # 获取查询的标记位
dtl_sql = 'select CKey from children_title'
cursor.execute(dtl_sql)
dtl = cursor.fetchall()
new_dtl = list(set(dtl))
add_list_box = []
content_list_box = []
for i in new_dtl:
    content = ''
    dtl_tupe = i[0]
    add_list_box.append(dtl_tupe)
    content += i[0]
    content_list_box.append(content)
print(content_list_box)