import os
import json

name = 'data.json'
if not(os.path.exists(name) and os.path.isfile(name)):
    with open(name, 'w') as f:
        f.write('["如果data.json不存在，便创建并写入Json格式的默认参数。"]')
        
with open(name, 'r') as f:
    cfg = json.load(f)

    
print(cfg)

fn = input('输入文件名: ')
try:
    with open(fn, 'r') as f:
        pass
except IOError:
    file = open(fn, 'w')