使用Selenium的浏览器自动化，让我们看看它是如何进行的：

1.打开浏览器
2.创建浏览器实例并使用.get函数连接网站。
3.找到元素，这可以是找到输入框或按钮的任何东西，并使用selenium函数，如click（），send_keys（）等与元素交互。
4.关闭浏览器

代码：

from selenium import webdriver

# For using sleep function because selenium

# works only when the all the elemets of the

# page is loaded.

import time

from selenium.webdriver.common.keys import Keys

# Creating an instance webdriver

browser = webdriver.Firefox()

browser.get('https://www.twitter.com')

# Let's the user see and also load the element

time.sleep(2)

login = browser.find_elements_by_xpath('//*[@id="doc"]/div[1]/div/div[1]/div[2]/a[3]')

# using the click function which is similar to a click in mouse.

login[0].click()

print("Loggin in Twitter")

user = browser.find_elements_by_xpath('//*[@id="login-dialog-dialog"]/div[2]/div[2]/div[2]/form/div[1]/input')

# Enter User Name

user[0].send_keys('USER-NAME')

user = browser.find_element_by_xpath('//*[@id="login-dialog-dialog"]/div[2]/div[2]/div[2]/form/div[2]/input')

# Reads password from a text file because

# saving the password in a script is just silly.

with open('test.txt', 'r') as myfile:

Password = myfile.read().replace('\n', '')

user.send_keys(Password)

LOG = browser.find_elements_by_xpath('//*[@id="login-dialog-dialog"]/div[2]/div[2]/div[2]/form/input[1]')

LOG[0].click()

print("Login Sucessfull")

time.sleep(5)

elem = browser.find_element_by_name("q")

elem.click()

elem.clear()

elem.send_keys("Geeks for geeks ")

# using keys to send special KEYS

elem.send_keys(Keys.RETURN)

print("Search Sucessfull")

# closing the browser

browser.close()