练习题

2、写一个程序，创建一些数据。

     1、创建10个文件夹，文件夹名字自定义  

    2、每个文件下面有10个 日志文件， 

            文件名是从今天开始的前10天 

                android_2018-07-01.log

                android_2018-06-30.log 

                android_2018-06-29.log 

                android_2018-06-28.log 

                android_2018-06-28.log 

                android_2018-06-28.log 

                android_2018-06-28.log  

    3、随机选3个文件，往里面写点东西  

3、写一个程序，把上面那些空文件删掉，还有3天前的删掉

import os,time,datetime,random
#创建文件夹
def makedir(path,num):
    path = str(path).rstrip(‘\\‘)
    if os.path.exists(path):
        print("目录:%s已存在"%path)
        return False
    else:
        for i in range(num):
            os.makedirs(path+str(i))
        return True
def timestampToStr(timestamp=None,format = ‘%Y-%m-%d‘):
    if timestamp:
        time_tuple = time.localtime(timestamp)
        return time.strftime(format,time_tuple)
    return time.strftime(format)
def strtoTimeStamp(str=None,format = ‘%Y-%m-%d‘):
    if str:
        time_tuple = time.strptime(str,format)
        return time.mktime(time_tuple)
    return time.time()
def timeDelate(num):
    if num==0:
        return time.time()
    return time.time()-24*60*60*num
def makefile(path,num):
    for cur, dir, file in os.walk(path):
        for d in dir:
            for i in range(num):
                d_time = timestampToStr(timeDelate(i))
                str = ‘_‘ + d_time + ‘.log‘
                f = os.path.join(d) + str
                file_path = os.path.join(cur, d)
                file_name = file_path + ‘\\‘ + f
                f = open(file_name, ‘w‘)
                f.close()
def writeToFile(path,num):
    for cur, dir, file in os.walk(path):
        for d in dir:
            get_path = os.path.join(cur, d)
            f_choose = random.sample(os.listdir(get_path), num)
            for f in f_choose:
                fpath = os.path.join(cur, d)+‘\\‘+f
                print(fpath)
                with open(fpath, ‘w‘) as f:
                    f.write(‘test‘)
def delFile(path):
    for cur, dir, file in os.walk(path):
        for f in file:
            file_path = os.path.join(cur, f)
            if os.path.getsize(file_path) == 0:
                os.remove(file_path)
            else:
                str = f.split(‘_‘)[1].split(‘.‘)[0]
                if time.time() - strtoTimeStamp(str) > 60 * 60 * 24 * 3:
                    os.remove(os.path.join(cur, f))

f_path =‘logs\\name‘
path=‘logs‘
makedir(f_path,10)
makefile(path,10)
writeToFile(path,3)
delFile(path)