python - 想用 selenium 登陆网站，但是无法获取弹出的验证码 frame 的名称，无法切换frame无法控制

http://wuxia.qq.com/cp/a20160... 天涯明月刀的网站，想自动领取奖励，登陆这块就遇到问题

打开网站后，点击登陆，切换到 loginIframe 登陆 frame 输入用户名密码正确，但是登陆后无法控制验证码所在的 frame ，看不出名字，没法切换也就无法控制

代码如下:

tyurl = "http://wuxia.qq.com/cp/a20160920tmfl/"

username = "123456"
pwd  = "1234561"

binary = FirefoxBinary("z:\\firefox\\firefox.exe")

driver = webdriver.Firefox(firefox_binary=binary,executable_path = "z:\geckodrive\geckodriver.exe")

driver.get(tyurl)


driver.find_element_by_id("dologin").click()
driver.switch_to_frame("loginIframe")

# 等待账号密码登录窗口出现，点击账号密码登
WebDriverWait(driver, 10,1).until(EC.presence_of_element_located((By.ID,"switcher_plogin")))
driver.find_element_by_id("switcher_plogin").click()

# 输入账号密码
WebDriverWait(driver, 30,1).until(EC.presence_of_element_located((By.ID,"login_button")))

for i in range(1,20):
    try:
        driver.find_element_by_id("u").click()
        driver.find_element_by_id("u").send_keys(username)
        driver.find_element_by_id("p").click()
        driver.find_element_by_id("p").send_keys(pwd)
        break
    except Exception, e:
        pass


# 输入密码点击确定后无法定位验证码窗口
try:
    WebDriverWait(driver, 5,1).until(EC.presence_of_element_located((By.ID,"capImg")))
except Exception, e:
    pass


# 找不到当前验证码窗口里的ID capImg
print(driver.find_element_by_id("capImg").src)