day03：爬取京东商品信息

from selenium import webdriver  # 用来驱动浏览器的
from selenium.webdriver import ActionChains  # 破解滑动验证码的时候用的 可以拖动图片
from selenium.webdriver.common.by import By  # 按照什么方式查找，By.ID,By.CSS_SELECTOR
from selenium.webdriver.common.keys import Keys  # 键盘按键操作
from selenium.webdriver.support import expected_conditions as EC  # 和下面WebDriverWait一起用的
from selenium.webdriver.support.wait import WebDriverWait  # 等待页面加载某些元素
import time


    #js_code = '''
    #window.
    #'''
def get_good(driver):
    num = 1
    try:
        time.sleep(5)
        js_code = '''
            window.scrollTo(0,5000)
        '''
        driver.execute_script(js_code)
        time.sleep(5)
        good_list = driver.find_elements_by_class_name('gl-item')
        for good in good_list:

        #printf(good)
        #商品信息
             good_name = good.find_element_by_css_selector('.p-name em').text

        #print(good_name)

        #商品链接
             good_url = good.find_element_by_css_selector('.p-name a').get_attribute('href')

        #商品价格
             good_price = good.find_element_by_class_name('p-price').text
        #print(good_price)

        #商品评价
             good_commit = good.find_element_by_class_name('p-commit').text

             good_content = f'''
             num:{num}
             商品价格;{good_name}
             商品链接:{good_url}
             商品价格:{good_price}
             商品评价:{good_commit} 
             \n
             '''
             print(good_content)
             num+=1
             with open('jd.txt','a',encoding='utf-8') as f:
                  f.write(good_content)
        print('商品信息写入成功')

    #找到下一页并点击
        next_tag = driver.find_element_by_class_name('pn-next')
        next_tag.click()
        time.sleep(5)
        get_good(driver)
    finally:
        driver.close()

if __name__=='__main__':
    driver = webdriver.Chrome()
    try:
        driver.implicitly_wait(10)
        # 往京东发送请求
        driver.get('https://www.jd.com')

        # 往京东主页输入框输入墨菲定律，按回车键
        input_tag = driver.find_element_by_id('key')
        input_tag.send_keys('墨菲定律')
        input_tag.send_keys(Keys.ENTER)
        get_good(driver)
    finally:
        driver.close()