python selenium查找元素

Question

找到https://accounts.google.com/ServiceLogin?的电子邮件输入的正确代码是什么

html是<input id="Email" class="" type="email" spellcheck="false" value="" placeholder="Email" name="Email"></input>

我指的是https://pypi.python.org/pypi/selenium

from selenium import webdriver
browser = webdriver.Firefox()
browser.get('https://accounts.google.com/ServiceLogin?')

为了elem = browser.find_element_by_name()我试过：

elem=browser.find_element_by_name('input id="Email"')
elem=browser.find_element_by_name('input id="Email" class="" type="email" spellcheck="false" value="" placeholder="Email" name="Email"')
elem=browser.find_element_by_name('input id="Email" class=""')
elem=browser.find_element_by_name('id="Email" class="" type="email" spellcheck="false" value="" placeholder="Email" name="Email"')
elem=browser.find_element_by_name('id="Email" class=""')

这些都不管用。