seleniun 爬取淘宝网

 import re
 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
 from pyquery import PyQuery as pq

 import pymongo

 MONGO_URL = 'localhost'
 MONGO_DB = 'taobao'
 MONGO_TABLE = 'product'

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

 KEYWORD = '美食'

 client = pymongo.MongoClient(MONGO_URL)
 db = client[MONGO_DB]

 browser = webdriver.PhantomJS(service_args=SERVICE_ARGS)
 wait = WebDriverWait(browser, 10)

 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'))
         )
         submit = wait.until(
             EC.element_to_be_clickable((By.CSS_SELECTOR, '#J_TSearchForm > div.search-button > button')))
         input.send_keys(KEYWORD)
         submit.click()
         total = wait.until(
             EC.presence_of_element_located((By.CSS_SELECTOR, '#mainsrp-pager > div > div > div > div.total')))
         get_products()
         return total.text
     except TimeoutException:
         return search()

 def next_page(page_number):
     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_products()
     except TimeoutException:
         next_page(page_number)

 def get_products():
     wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, '#mainsrp-itemlist .items .item')))
     html = browser.page_source
     doc = pq(html)
     items = doc('#mainsrp-itemlist .items .item').items()
     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()
         }
         print(product)
         save_to_mongo(product)

 def save_to_mongo(result):
     try:
         if db[MONGO_TABLE].insert(result):
             print('存储到MONGODB成功', result)
     except Exception:
         print('存储到MONGODB失败', result)

 def main():
     try:
         total = search()
         total = int(re.compile('(\d+)').search(total).group(1))
         for i in range(2, total + 1):
             next_page(i)
     except Exception:
         print('出错啦')
     finally:
         browser.close()

 if __name__ == '__main__':
     main()