# 1.计算 年月日时分秒 于现在之间差了多少 格式化时间
# 现在
# 某一个年月日时分秒 参数
# import time
# def get_time(old_t,fmt = '%Y-%m-%d %H:%M:%S'):
# struct_t = time.strptime(old_t,fmt)
# stmp_old = time.mktime(struct_t)
# stmp_now = time.time()
# tmp = stmp_now - stmp_old
# t = time.gmtime(tmp)
# return(t.tm_year-1970,
# t.tm_mon - 1,
# t.tm_mday -1,
# t.tm_hour -0,
# t.tm_min -0,
# t.tm_sec -0)
# div_time = get_time('2018-11-11 17:52:11')
# print(div_time)
# 2.4位的字母+数字验证码
# import random
# def code(n=4):
# end = ''
# for i in range(n):
# num = str(random.randint(0,9))
# alpha_up = chr(random.randint(65,90))
# alpha_low = chr(random.randint(97,122))
# aim = random.choice([num,alpha_up,alpha_low])
# end += aim
# return end
# print(code())
# import random#alpha = True生成字母数字验证码,alpha=False生成纯数字验证码
# def code(n=4,alpha = True):
# end = ''
# for i in range(n):
# aim = str(random.randint(0,9))
# if alpha:
# alpha_up = chr(random.randint(65,90))
# alpha_low = chr(random.randint(97,122))
# aim = random.choice([aim,alpha_up,alpha_low])
# end += aim
# return end
# print(code(n=6,alpha=False))
# print(code())
# 4.查看某个目录下的所有文件(包括子文件夹中的)
# import os
# def list_dir(path):
# lst = os.listdir(path)
# for name in lst:
# full_path = os.path.join(path,name)
# if os.path.isdir(full_path):
# list_dir(full_path)
# else:
# print(full_path)
# list_dir('E:\s17')
# 5.计算文件夹的总大小
# import os
# def list_dir(path):
# lst = os.listdir(path)
# sum_size = 0
# for name in lst:
# full_path = os.path.join(path,name)
# if os.path.isdir(full_path):
# ret = list_dir(full_path) # 'E:\s17\day18\day17_作业讲解'
# sum_size += ret
# else:
# file_size = os.path.getsize(full_path)
# sum_size += file_size
# return sum_size
# ret = list_dir(r'E:\s17')
# print(ret)
