1.项目准备：网站地址：http://quanzhou.tianqi.com/
2.创建编辑Scrapy爬虫：
scrapy startproject weather
scrapy genspider HQUSpider quanzhou.tianqi.com
项目文件结构如图：
3.修改Items.py：
4.修改Spider文件HQUSpider.py：
(1)先使用命令：scrapy shell http://quanzhou.tianqi.com/ 测试和获取选择器：
(2)试验选择器：打开chrome浏览器，查看网页源代码：
(3)执行命令查看response结果：
(4)编写HQUSpider.py文件：
–– coding: utf-8 ––
import scrapy
from weather.items import WeatherItem
class HquspiderSpider(scrapy.Spider):
name = ‘HQUSpider’
allowed_domains = [‘tianqi.com’]
citys=[‘quanzhou’,’datong’]
start_urls = []
for city in citys:
start_urls.append(‘http://’+city+’.tianqi.com/’)
def parse(self, response):
subSelector=response.xpath(‘//div[@class=”tqshow1″]’)
items=[]
for sub in subSelector:
item=WeatherItem()
cityDates=”
for cityDate in sub.xpath(‘./h3//text()’).extract():
cityDates+=cityDate
item[‘cityDate’]=cityDates
item[‘week’]=sub.xpath(‘./p//text()’).extract()[0]
item[‘img’]=sub.xpath(‘./ul/li[1]/img/@src’).extract()[0]
temps=”
for temp in sub.xpath(‘./ul/li[2]//text()’).extract():
temps+=temp
item[‘temperature’]=temps
item[‘weather’]=sub.xpath(‘./ul/li[3]//text()’).extract()[0]
item[‘wind’]=sub.xpath(‘./ul/li[4]//text()’).extract()[0]
items.append(item)
return items
(5)修改pipelines.py我，处理Spider的结果：
–– coding: utf-8 ––
Define your item pipelines here
Don’t forget to add your pipeline to the ITEM_PIPELINES setting
See: http://doc.scrapy.org/en/latest/topics/item-pipeline.html
import time
import os.path
import urllib2
import sys
reload(sys)
sys.setdefaultencoding(‘utf8’)
class WeatherPipeline(object):
def process_item(self, item, spider):
today=time.strftime(‘%Y%m%d’,time.localtime())
fileName=today+’.txt’
with open(fileName,’a’) as fp:
fp.write(item[‘cityDate’].encode(‘utf-8′)+’\t’)
fp.write(item[‘week’].encode(‘utf-8′)+’\t’)
imgName=os.path.basename(item[‘img’])
fp.write(imgName+’\t’)
if os.path.exists(imgName):
pass
else:
with open(imgName,’wb’) as fp:
response=urllib2.urlopen(item[‘img’])
fp.write(response.read())
fp.write(item[‘temperature’].encode(‘utf-8′)+’\t’)
fp.write(item[‘weather’].encode(‘utf-8′)+’\t’)
fp.write(item[‘wind’].encode(‘utf-8′)+’\n\n’)
time.sleep(1)
return item
(6)修改settings.py文件，决定由哪个文件来处理获取的数据：
(7)执行命令：scrapy crawl HQUSpider
到此为止，一个完整的Scrapy爬虫就完成了。
原文：http://www.cnblogs.com/hqutcy/p/7284302.html
Original: https://blog.csdn.net/weixin_42365688/article/details/113672625
Author: 闪电肉
Title: python爬虫天气实例scrapy_2017.08.04 Python网络爬虫之Scrapy爬虫实战二 天气预报…
原创文章受到原创版权保护。转载请注明出处：https://www.johngo689.com/791570/
转载文章受原作者版权保护。转载请注明原作者出处！