Python3 with open 怎样处理文件不存在的异常？

我想大声告诉你    2017-07-05 10:36:572楼

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

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给我你的怀抱    2017-07-05 10:36:571楼

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)

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