淘宝美食获取

代码思路非常清晰，值得借鉴。这里用到pyquert库解析，selenium库驱动浏览器，以及mongodb数据库，具体代码：

# coding=utf-8
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
from config import *
import pymongo

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

browser = webdriver.PhantomJS(service_args=SERVICE_ARGS) # 调用PhantomJS，不显示Chrome窗口
wait = WebDriverWait(browser, 10)
browser.set_window_size(1400,900)  # 浏览器窗口大小一定要设置，不然不会出现结果

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'))) # 注意这边是双括号，最后加上css选择器，去网页中获取select
        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_product()
        return total.text
    except TimeoutException:
        return search()

def next_to_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_product()
    except TimeoutException:
        next_to_page(page_number)

def get_product():    
    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'),#找到这个类下的这个标签
            'price' :item.find('.price').text(),
            'deal_people' :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): # 存到数据库操作
    try:
        if db[MONGO_TABLE].insert(result):
            print('存到mongodb成功',result)
    except Exception:
        print('存到mongodb失败',result)


def main():
    try:  # 浏览器可能不会正常工作，需要异常处理，避免程序中断
        total = search()
        total = int(re.compile('(\d+)').search(total).group(1)) # 输出共100页，我们只需要100这个数字，因此用正则表达式去匹配100这个数字
        for i in range (2,total + 1):
            next_to_page(i)
    except Exception:
        print('出错')
    finally:
        browser.close()

if __name__ == '__main__':
    main()

MongoDB需要配置的信息，这里不需要设置总页数，直接翻到最后即可。
MONGO_URL = 'localhost'
MONGO_DB = '淘宝美食'
MONGO_TABLE = '美食'
KEYWORD = '美食'
SERVICE_ARGS = ['--load-images=false','--disk-cache=true']#不下载图片，并且开启缓存

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