空气质量指数计算5.0

程序：

import requests
from bs4 import BeautifulSoup

def get_city_aqi(city_pinyin):
“”"
获取城市的AQI
“”"
url = ‘http://pm25.in/’ + city_pinyin
r = requests.get(url, timeout=30)
soup = BeautifulSoup(r.text, ‘lxml’)
div_list = soup.find_all(‘div’, {‘class’: ‘span1’})

city_aqi = []
for i in range(8):
    div_content = div_list[i]
    caption = div_content.find('div', {'class': 'caption'}).text.strip()
    value = div_content.find('div', {'class': 'value'}).text.strip()

    city_aqi.append((caption, value))
return city_aqi

def get_all_cities():
“”"
获取所有城市
“”"
url = ‘http://pm25.in/’
city_list = []
r = requests.get(url, timeout=30)
soup = BeautifulSoup(r.text, ‘lxml’)

city_div = soup.find_all('div', {'class': 'bottom'})[1]
city_link_list = city_div.find_all('a')
for city_link in city_link_list:
    city_name = city_link.text
    city_pinyin = city_link['href'][1:]
    city_list.append((city_name, city_pinyin))
return city_list

def main():
“”"
主函数
“”"
city_list = get_all_cities()
for city in city_list:
city_name = city[0]
city_pinyin = city[1]
city_aqi = get_city_aqi(city_pinyin)
print(city_name, city_aqi)

if name == ‘main’:
main()

运行结果：