Python+selenium自动循环送贺卡

Python源代码如下:

# coding=utf-8
from selenium import webdriver
from time import sleep
from random import randint

def auto_throw(target_qq, username, password):
    """自动循环送贺卡"""
    driver = webdriver.Chrome()
    driver.get("https://mail.qq.com")
    driver.set_window_size(1100, 580)
    sleep(1)
    # 切换iframe表单
    driver.switch_to.frame("login_frame")
    driver.find_element_by_xpath('//*[@id="u"]').send_keys(username)
    driver.find_element_by_xpath('//*[@id="p"]').send_keys(password)
    driver.find_element_by_xpath('//*[@id="login_button"]').click()
    sleep(1)
    # 将表单切回到最外层
    driver.switch_to.default_content()
    sleep(2)
    m = 0
    while True:
        try:
            m += 1
            driver.switch_to.default_content()
            driver.find_element_by_xpath('//*[@id="folder_card"]').click()  # 贺卡
            sleep(2)
            # 切换iframe表单
            driver.switch_to.frame("mainFrame")
            driver.find_element_by_xpath('//*[@id="preview_1072308"]/img').click()   # 儿童节
            # 将表单切回到最外层
            driver.switch_to.default_content()
            sleep(2)
            driver.find_element_by_xpath('//div[@class="dialog_operate"]/a').click()    # 发送
            sleep(2)
            driver.find_element_by_xpath('//a[@title="%s@qq.com"]'%target_qq).click()
            sleep(1)
            driver.find_element_by_xpath('//*[@id="GreetingCard_QMDialog_content"]').clear()
            driver.find_element_by_xpath('//*[@id="GreetingCard_QMDialog_content"]').send_keys("第%d张贺卡发送成功!随机代号%d!"%(m,randint(10000,100000)))
            sleep(2)
            driver.find_element_by_xpath('//*[@id="GreetingCard_QMDialog_sendbtn"]').click()   # 发送
            print("第%d张贺卡发送成功!"%m)
            sleep(2)
        except:
            print("送卡失败!")
            sleep(2)

if __name__ == '__main__':
    print("--------自动循环送贺卡脚本--------")
    target_qq = input("请输入对方qq号:")
    username = input("输入你的QQ邮箱用户名:")
    password = input("输入你的QQ邮箱登录密码:")
    auto_throw(target_qq, username, password)