from selenium import webdriver

 from selenium.common.exceptions import TimeoutException

 from selenium.webdriver.common.by import By

 from selenium.webdriver.support.ui import WebDriverWait

 from selenium.webdriver.support import expected_conditions as EC

 import re

 from pyquery import PyQuery as pq

 from config import *

 import pymongo

 client = pymongo.MongoClient(MONGO_URL)

 db =client[MONGO_DB]

 browser = webdriver.PhantomJS(service_args=SERVICE_ARGS)

 wait = WebDriverWait(browser, 10)# 等待时长10秒，默认0.5秒询问一次，等待页面加载完成，找到某个条件发生后再继续执行后续代码，如果超过设置时间检测不到则抛出异常

 browser.set_window_size(1400,900)

 def search():

     print("正在搜索")

     try:

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

         input = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "#q")))#模拟输入框

         submit = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR,"#J_TSearchForm > div.search-button > button")))

         #模拟搜索按钮

         input.send_keys('美食')#添加input

         submit.click()#模拟按下搜索按钮

         total=wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "#mainsrp-pager > div > div > div > div.total")))

         get_product()

         return total.text

     except TimeoutException:

         return search()

 def next_page(page_number):#翻页，把当前页码清除后，直接跳转到想去的页码

     print("正在翻页",page_number)

     try:

         input = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "#mainsrp-pager > div > div > div > div.form > input")))

         submit = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR,"#mainsrp-pager > div > div > div > div.form > span.btn.J_Submit")))

         input.clear()

         input.send_keys(page_number)

         submit.click()

         wait.until(EC.text_to_be_present_in_element(

             (By.CSS_SELECTOR,"#mainsrp-pager > div > div > div > ul > li.item.active > span"),str(page_number)))

         get_product()

     except TimeoutException:

         next_page(page_number)

 def get_product():#获得每页商品内容，pyquery not understand

     wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "#mainsrp-itemlist .items .item")))

     html =browser.page_source

     # print(html)

     doc = pq(html)

     items = doc("#mainsrp-itemlist .items .item").items()#注意class名字后空格！

     for item in items:

         product = {

             'image':item.find('.pic .img').attr('src'),

             'price':item.find('.price').text(),

             'deal':item.find('.deal-cnt').text()[:-3],

             'title':item.find('.title').text(),

             'shop':item.find('.shop').text(),

             'location':item.find('.location').text()#find 查找的是div class的名字 别的标签不可以

         }

         print(product)

         save_to_mongo(product)

 def save_to_mongo(result):#将数据存储到mongodb

     try:

         if db[MONGO_TABLE].insert(result):

             print('存储成功->',result)

     except Exception:

         print('存储失败->',result)

 def main():

     total = search()

     total = int(re.compile('\d+').search(total).group(0))

     for i in range(2,20):

         next_page(i)

     browser.close()

 if __name__ == '__main__':

     main()

MONGO_URL = 'localhost'

MONGO_DB = 'taobao'

MONGO_TABLE = 'product'

SERVICE_ARGS  = ['--load-images=false', '--disk-cache=true']