练手例子定义函数--求差、时间、批量建文件夹、下载

import datetime, os, time

def dif_num(a, b):
    total_str = b - a
    print("差", total_str)
    return total_str


def get_time():
    now_time = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
    print("今日时间",now_time)


def create_floder():
    for i in range(1, 2):
        time.sleep(2)
        folder = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
        print(folder)
        path = r'F:\test\Logs_'
        os.mkdir(path + folder)


def down_load():
    down_url = 'http://www.zipython.com/images/angel.mp3'
    # system中传参用%
    os.system("wget %s" % down_url)

# 函数调用
dif_num(1, 2)
get_time()
create_folder()
down_load()