用python+selenium获取北上广深成五地PM2.5数据信息并按空气...
用python+selenium获取北上广深成五地PM2.5数据信息并按空气质量排序从http://www.pm25.com/shenzhen.html抓取北京，深圳，上海，广州，成都的pm2.5指数，并按照空气质量从优到差排序，保存在txt文档里
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#coding=utf-8
from selenium import webdriver
from time import sleep
class PM:
def __init__(self):
self.dr = webdriver.Chrome()
self.pm25_info = self.get_pm25_info()
def get_pm25_info(self):
city_list = ['beijing','shenzhen','shanghai','guangzhou','chengdu']
pm_info_list = []
i = 0
while i < len(city_list):
self.dr.get('http://www.pm25.com/'+city_list+'.html')
sleep(3)
city_name = self.dr.find_element_by_css_selector('.bi_loaction_city').text #定位城市名字
pm_exp = self.dr.find_element_by_css_selector('.bi_aqiarea_num').text #定位PM2.5指数
air_quality = self.dr.find_element_by_css_selector('.bi_aqiarea_right span').text #定位空气质量
pm_info_list.append((city_name, pm_exp, air_quality))
i += 1
pm_info_list.sort(key=lambda x:float(x))
return pm_info_list
def get_pm_file(self):
self.file_title = '北上广深成五地PM2.5数据信息'
self.file = open(self.file_title + '.txt', 'wb')
self.floor = 1
for item in self.pm25_info:
separate_line = '**********' + 'TOP' + str(self.floor) + '**********\n'
self.file.write(separate_line.encode('utf-8'))
self.file.write(('城市: ' + item + '\n'
'PM2.5指数: ' + item + '\n'
'空气质量：' + item+ '\n').encode('utf-8'))
self.floor += 1
self.file.close()
def quit(self):
self.dr.quit()
if __name__ == '__main__':
pm_info = PM()
pm_info.get_pm_file()
pm_info.quit()
网页如下：
https://attachments.tower.im/tower/f6fa1944c7584be49b727ecb73bcd371?version=auto&filename=Clipboard%20Image.png
生成txt如下：
https://attachments.tower.im/tower/b1bcc47d835c45d892d2ce25d14e6eaf?version=auto&filename=Clipboard%20Image.png
页:
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