Python /bs4：尝试从本地网站打印温度/城市

Question

我正在尝试从本地网站获取并打印当前的天气温度和城市名称，但没有成功。 我只需要它来读取和打印城市（Lodrina）、温度（23.1C）以及可能的话 ca-cond-firs 中的标题（“Temperatura em declínio”）——最后一个会随着温度的升高或降低而变化。 ..

这是网站的 html 部分：

THIS IS THE HTML (the part of matters:)
#<div class="ca-cidade"><a href="/site/internas/conteudo/meteorologia/grafico.shtml?id=23185109">Londrina</a></div>
<ul class="ca-condicoes">
<li class="ca-cond-firs"><img src="/site/imagens/icones_condicoes/temperatura/temp_baixa.png" title="Temperatura em declínio"/><br/>23.1°C</li>
<li class="ca-cond"><img src="/site/imagens/icones_condicoes/vento/L.png"/><br/>10 km/h</li>
<li class="ca-cond"><div class="ur">UR</div><br/>54%</li>
<li class="ca-cond"><img src="/site/imagens/icones_condicoes/chuva.png"/><br/>0.0 mm</li>

这是我到目前为止所做的代码：

from bs4 import BeautifulSoup
import requests

URL = 'http://www.simepar.br/site/index.shtml'

rawhtml = requests.get(URL).text
soup = BeautifulSoup(rawhtml, 'lxml')

id = soup.find('a', 'id=23185109')
print(id)

有什么帮助吗？

Answer 1

from bs4 import BeautifulSoup
import requests

URL = 'http://www.simepar.br/site/index.shtml'

rawhtml = requests.get(URL).text
soup = BeautifulSoup(rawhtml, 'html.parser') # parse page as html

temp_table = soup.find_all('table', {'class':'cidadeTempo'}) # get detail of table with class name cidadeTempo
for entity in temp_table:
    city_name = entity.find('h3').text # fetches name of city
    city_temp_max = entity.find('span', {'class':'tempMax'}).text # fetches max temperature
    city_temp_min = entity.find('span', {'class':'tempMin'}).text # fetches min temperature
    print("City :{} \t Max_temp: {} \t Min_temp: {}".format(city_name, city_temp_max, city_temp_min)) # prints content

下面的代码可以根据需要在页面右侧获取温度的详细信息。

result_table = soup.find('div', {'class':'ca-content-wrapper'})
print(result_table.text) # in your case there is no other div exist with class name ca-content-wrapper hence I can use it directly without iterating. you can use if condition to control which city temprature to print and which to not.
    # output will be like :
        # Apucarana

        # 21.5°C
        # 4 km/h
        # UR60%
        # 0.0 mm

Answer 2

我不确定您的代码遇到了什么问题。在尝试使用您的代码时，我发现我需要使用 html 解析器才能成功解析网站。我还使用了 soup.findAll() 来查找与所需类匹配的元素。希望以下内容能引导您找到答案：

from bs4 import BeautifulSoup
import requests

URL = 'http://www.simepar.br/site/index.shtml'

rawhtml = requests.get(URL).text
soup = BeautifulSoup(rawhtml, 'html.parser')

rows = soup.findAll('li', {'class', 'ca-cond-firs'})
print rows

Answer 3

你应该试试 BS4 中的 CSS3 选择器，我个人觉得它比 find 和 find_all 更容易使用。

from bs4 import BeautifulSoup
import requests

URL = 'http://www.simepar.br/site/index.shtml'

rawhtml = requests.get(URL).text
soup = BeautifulSoup(rawhtml, 'lxml')

# soup.select returns the list of all the elements that matches the CSS3 selector

# get the text inside each <a> tag inside div.ca-cidade
cities = [cityTag.text for cityTag in soup.select("div.ca-cidade > a")] 

# get the temperature inside each li.ca-cond-firs
temps = [tempTag.text for tempTag in soup.select("li.ca-cond-firs")]

# get the temperature status inside each li.ca-cond-firs > img title attibute
tempStatus = [tag["title"] for tag in soup.select("li.ca-cond-firs > img")]

# len(cities) == len(temps) == len(tempStatus) => This is normally true.

for i in range(len(cities)):
    print("City: {}, Temperature: {}, Status: {}.".format(cities[i], temps[i], tempStatus[i]))

Answer 4

给你。您可以根据图标名称自定义风的东西。

#!/usr/bin/env python
# -*- encoding: utf8 -*-
import sys

reload(sys)
sys.setdefaultencoding('utf-8')

from bs4 import BeautifulSoup
import requests

def get_weather_data():

    URL = 'http://www.simepar.br/site/index.shtml'

    rawhtml = requests.get(URL).text
    soup = BeautifulSoup(rawhtml, 'html.parser')

    cities = soup.find('div', {"class":"ca-content-wrapper"})

    weather_data = []

    for city in cities.findAll("div", {"class":"ca-bg"}):

        name = city.find("div", {"class":"ca-cidade"}).text
        temp = city.find("li", {"class":"ca-cond-firs"}).text

        conditons = city.findAll("li", {"class":"ca-cond"})

        weather_data.append({
            "city":name,
            "temp":temp,
            "conditions":[{
                "wind":conditons[0].text +" "+what_wind(conditons[0].find("img")["src"]),
                "humidity":conditons[1].text,
                "raind":conditons[2].text,
            }]
        })


    return weather_data

def what_wind(img):
    if img.find ("NE"):
        return "From North East"

    if img.find ("O"):
        return "From West"

    if img.find ("N"):
        return "From North"

    #you can add other icons here


print get_weather_data()

这是来自该网站的所有天气数据。