Python的print输出到文件在python2.x和3.x下完全不同

python2.7仅支持此方式,注意第二个参数为"a"为增加,"w"为写入

def log(args,kwargs):
    with open("log.txt","a") as f:
    print args, kwargs
    print>>f,args+':'+kwargs

python3.x才支持print带file参数

def log(*args, **kwargs):
    with open('log.txt' , 'a', encoding='utf-8') as f:
    print(*args,file=f,**kwargs)

用log()调用调试日志,程序完成后可直接在log()函数里PASS掉所有输出

        log('正在存储章节',chaptername)

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