Python/bs4:尝试从本地网站打印温度/城市

Question

我试图从当地网站上获取并打印当前的天气温度和城市名称，但没有成功。 我只需要它来阅读和打印城市（Lodrina），温度（23.1C），如果可能的话，标题是冷杉（“Temperatura em declínio”）—最后一个随着温度的上升或下降而变化。。。在

网站的html部分是：

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>

这是我目前所做的代码：

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有什么帮助吗？在

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

下面的代码可以得到详细的温度在页面的右侧，如您所需。在

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Answer 2

你应该试试BS4中的CSS3选择器，我个人觉得它比find and find-all要容易得多。在

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 3

我不知道你的代码遇到了什么问题。在我尝试使用您的代码时，我发现我需要使用html解析器来成功解析网站。我也用过芬德尔汤（）以查找与所需类匹配的元素。希望下面的内容能让你找到答案：

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