Using Python+selenium to obtain the PM2.5 data information and sort by air quality in North Guangzhou

from http://www.pm25.com/shenzhen.html crawl Beijing, Shenzhen, Shanghai, Guangzhou, Chengdu PM2.5 Index, and according to the air quality favorably to the difference sort, saved in txt document

#coding =UTF-8FROM&NBSP;SELENIUM&NBSP;IMPORT&NBSP;WEBDRIVERFROM&NBSP;TIME&NBSP;IMPORT&NBSP;SLEEPCLASS&NBSP;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 = 0while i  < len (city_list): Self.dr.get (' http://www.pm25.com/' +city_list[i]+ '. 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 index 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 += 1pm_info_list.sort (Key=lambda x:float (x[1])) return  pm_info_listdef get_pm_file (self):self.file_title =  ' North Canton deep into five PM2.5 data information ' SELf.file = open (self.file_title +  '. txt ',  ' WB ') Self.floor = 1for item  in self.pm25_info:separate_line =  ' ********** '  +  ' TOP '  + str ( Self.floor)  +  ' **********\n ' Self.file.write (Separate_line.encode (' Utf-8 ')) Self.file.write (' City:   '  + item[0] +  ' \ n '   ' PM2.5 index:  '  + item[1] +  ' \ n '   ' Air quality: '  + item[2]+  ' \ n '). Encode (' Utf-8 ')) Self.floor += 1self.file.close () def quit (self): self.dr.quit () if __name__ ==  ' __main__ ':p m_info = pm () pm_info.get_pm_file () pm_ Info.quit ()

The page is as follows:

650) this.width=650; "alt=" Clipboard image.png "class=" selected "src=" https://attachments.tower.im/tower/ F6fa1944c7584be49b727ecb73bcd371?version=auto&filename=clipboard%20image.png "width=" 484 "height=" 594 "style= "Margin:.2em 0px;padding:0px;border:1px solid RGB (217,217,217); font-size:15px;vertical-align:middle;width:auto; Height:auto;color:rgb (51,51,51); font-family:arial, Sans-serif;white-space:normal;background-color:rgb ( 255,255,255); "/>

Generate TXT as follows:

650) this.width=650; "alt=" Clipboard image.png "class=" selected "src=" https://attachments.tower.im/tower/ B1bcc47d835c45d892d2ce25d14e6eaf?version=auto&filename=clipboard%20image.png "width=" 338 "height=" 354 "style= "Margin:.2em 0px;padding:0px;border:1px solid RGB (217,217,217); font-size:15px;vertical-align:middle;width:auto; Height:auto;color:rgb (51,51,51); font-family:arial, Sans-serif;white-space:normal;background-color:rgb ( 255,255,255); "/>

Using Python+selenium to obtain the PM2.5 data information and sort by air quality in North Guangzhou