代码如下所示：
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
import time
#模拟登陆163邮箱
driver = webdriver.Firefox()
driver.get("http://mail.163.com/")
#用户名 密码
elem_user = driver.find_element_by_name("username")
elem_user.send_keys("15201615157")
elem_pwd = driver.find_element_by_name("password")
elem_pwd.send_keys("********")
elem_pwd.send_keys(Keys.RETURN)
time.sleep(5)
assert "baidu" in driver.title
driver.close()
driver.quit()
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
import time
driver = webdriver.Firefox()
driver.get("https://passport.csdn.net/account/login?from=http://my.csdn.net/my/mycsdn")
elem_user = driver.find_element_by_name("username")
elem_user.send_keys("Eastmount")
elem_pwd = driver.find_element_by_name("password")
elem_pwd.send_keys("********")
elem_pwd.send_keys(Keys.RETURN)
time.sleep(5)
assert "baidu" in driver.title
driver.close()
driver.quit()
from selenium.webdriver.common.by import By
driver.find_element(By.XPATH, '//button[text()="Some text"]')
driver.find_elements(By.XPATH, '//button')ID = "id"
XPATH = "xpath"
LINK_TEXT = "link text"
PARTIAL_LINK_TEXT = "partial link text"
NAME = "name"
TAG_NAME = "tag name"
CLASS_NAME = "class name"
CSS_SELECTOR = "css selector" 当你知道一个元素的id属性时使用该功能。有了这个方法，用id属性值匹配时第一个被定位的元素将被返回。如果没有元素匹配id值，一个NoSuchElementException异常将会抛出。例如，参考这个页面源码：
<html>
<body>
<form id="loginForm">
<input name="username" type="text" />
<input name="password" type="password" />
<input name="continue" type="submit" value="Login" />
</form>
</body>
<html>login_form = driver.find_element_by_id('loginForm') 当你知道一个元素的name属性时使用该方法。通过该方法，第一个满足name属性值的元素将被匹配返回，如果没有元素匹配，将抛出一个NoSuchElementException异常。例如，参考下面源码：
<html>
<body>
<form id="loginForm">
<input name="username" type="text" />
<input name="password" type="password" />
<input name="continue" type="submit" value="Login" />
<input name="continue" type="button" value="Clear" />
</form>
</body>
<html>username = driver.find_element_by_name('username')
password = driver.find_element_by_name('password')continue = driver.find_element_by_name('continue')<html>
<body>
<form id="loginForm">
<input name="username" type="text" />
<input name="password" type="password" />
<input name="continue" type="submit" value="Login" />
<input name="continue" type="button" value="Clear" />
</form>
</body>
<html>login_form = driver.find_element_by_xpath("/html/body/form[1]")
login_form = driver.find_element_by_xpath("//form[1]")
login_form = driver.find_element_by_xpath("//form[@id='loginForm']")username = driver.find_element_by_xpath("//form[input/@name='username']")
username = driver.find_element_by_xpath("//form[@id='loginForm']/input[1]")
username = driver.find_element_by_xpath("//input[@name='username']")clear_button = driver.find_element_by_xpath("//input[@name='continue'][@type='button']")
clear_button = driver.find_element_by_xpath("//form[@id='loginForm']/input[4]")<html>
<body>
<p>Are you sure you want to do this?</p>
<a href="continue.html">Continue</a>
<a href="cancel.html">Cancel</a>
</body>
<html>continue_link = driver.find_element_by_link_text('Continue')
continue_link = driver.find_element_by_partial_link_text('Conti')<html>
<body>
<h1>Welcome</h1>
<p>Site content goes here.</p>
</body>
<html>heading1 = driver.find_element_by_tag_name('h1')<html>
<body>
<p class="content">Site content goes here.</p>
</body>
<html>content = driver.find_element_by_class_name('content')<html>
<body>
<p class="content">Site content goes here.</p>
</body>
<html>content = driver.find_element_by_css_selector('p.content')