# _*_coding:utf-8_*_ from selenium import webdriverimport datetime import timedriver = webdriver.Chrome(executable_path='chromedriver.exe')def login(uname, pwd): driver.get("http://www.jd.com") driver.find_element_by_link_text("你好，請登錄").click() driver.find_element_by_link_text("賬戶登錄").click() driver.find_element_by_name("loginname").send_keys(uname) driver.find_element_by_name("nloginpwd").send_keys(pwd) driver.find_element_by_id("loginsubmit").click() driver.get("https://cart.jd.com/cart.action") driver.find_element_by_link_text("去結算").click() now = datetime.datetime.now() print('login success:',now.strftime('%Y-%m-%d %H:%M:%S'))# buytime = '2016-12-27 22:31:00' def buy_on_time(buytime): while True:  now = datetime.datetime.now()  if now.strftime('%Y-%m-%d %H:%M:%S') == buytime:   while True:    try:     driver.find_element_by_id('order-submit').click()    except Exception as e:     time.sleep(0.1)   print ('purchase success',now.strftime('%Y-%m-%d %H:%M:%S'))   time.sleep(0.5)# entrancelogin('username', 'password')buy_on_time('2017-01-01 14:00:01')