Python基于Selenium实现自动打开百度,京东

 

使用selenium去调用浏览器，需要一个驱动，浏览器的webdriver需要独立安装，
如果是chrome在浏览器输入框输入chrome://version/ 查看相应版本，

http://npm.taobao.org/mirrors/chromedriver/下载相应驱动即可

百度

# _*_ coding:utf-8 _*_

from selenium import webdriver

# 创建浏览器驱动对象
# 这行代码会打开一个空白的浏览器
driver = webdriver.Chrome()

# 访问到项目所在的网址
driver.get("https://www.baidu.com")

# 找到页面上的搜索输入框 id="kw"
# 找到元素以后，可以直接赋值给变量，再通过变量操作元素
ele = driver.find_element_by_id("kw")
ele.send_keys("大风吹")  # 对文本输入框输入内容

# 也可以直接操作元素, 百度一下 按钮的 id="su"
driver.find_element_by_id("su").click()

# # 但不能操作元素后再赋值给变量
# ele = driver.find_element_by_id("su").click()
# ele.click()  # 相当于 None.click()

# driver.quit()

　

京东：

# _*_ coding:gbk _*_

# 爬取 https://www.jd.com/ 京东图书
import csv
import time

from selenium import webdriver
from selenium.webdriver.chrome.service import Service
from selenium.webdriver.common.by import By


# 创建浏览器驱动对象
# 这行代码会打开一个空白的浏览器
driver = webdriver.Chrome()


# 京东所在网站
# 访问到项目所在的网址
driver.get("https://www.jd.com")



# 输入需要查找的关键字
p_input = driver.find_element(By.ID, 'key')
p_input.send_keys('Python编程')  # 找到输入框输入
time.sleep(1)

# 点击搜素按钮
button=driver.find_element(By.CLASS_NAME,"button").click()
time.sleep(1)

all_book_info = []
num=200
head=['书名', '价格']
#csv文件的路径和名字
path='./book.csv'
def write_csv(head,all_book_info,path):
    with open(path, 'w', newline='',encoding='gbk') as file:   # utf-8 乱码建议用  gbk
        fileWriter = csv.writer(file)
        fileWriter.writerow(head)
        fileWriter.writerows(all_book_info)
# 爬取一页
def get_onePage_info(num):
    driver.execute_script('window.scrollTo(0, document.body.scrollHeight);')
    time.sleep(2)
    # 书籍列表
    J_goodsList = driver.find_element(By.ID, "J_goodsList")
    listbook = J_goodsList.find_elements(By.TAG_NAME, "li")
    for res in listbook:
        num = num-1
        book_info = []
        name =res.find_element(By.CLASS_NAME, "p-name").find_element(By.TAG_NAME, "em").text
        price = res.find_element(By.CLASS_NAME, "p-price").find_element(By.TAG_NAME, "i").text
        book_info.append(name)
        book_info.append(price)
        # bookdetail = res.find_element(By.CLASS_NAME, "p-bookdetails")
        # author = bookdetail.find_element(By.CLASS_NAME, "p-bi-name").find_element(By.TAG_NAME, "a").text
        # store = bookdetail.find_element(By.CLASS_NAME, "p-bi-store").find_element(By.TAG_NAME, "a").text
        # book_info.append(author)
        # book_info.append(store)
        all_book_info.append(book_info)
        if num==0:
            break
    return num

while num!=0:
    num = get_onePage_info(num)
    driver.find_element(By.CLASS_NAME, 'pn-next').click()  # 点击下一页
    time.sleep(2)
write_csv(head, all_book_info, path)
# driver.close()