硒逐班找到元素，但返回空字符串。如何修复？

发布于 2025-01-20 08:56:34 字数 578 浏览 0 评论 0 原文

该代码尝试显示一个城市的天气预报。它能够找到包含内容的类，但打印出一个空字符串。这是为什么？我如何更改代码才能不得到空字符串？

from selenium import webdriver
from selenium.webdriver.chrome.service import Service
from selenium.webdriver.common.by import By

s=Service("C:\Program Files (x86)\chromedriver.exe")
browser = webdriver.Chrome(service=s)

city = str(input("Enter a city"))

url="https://www.weather-forecast.com/locations/"+city+"/forecasts/latest"
browser.get(url)
browser.maximize_window()

content = browser.find_element(By.CLASS_NAME, "b-forecast__table-description-content")
print(content.text)

原文

The code tries to show the weather forecast for a city. It is able to find the class with the content, but it prints out an empty string. Why is that and how could I change my code to not get an empty string?

from selenium import webdriver
from selenium.webdriver.chrome.service import Service
from selenium.webdriver.common.by import By

s=Service("C:\Program Files (x86)\chromedriver.exe")
browser = webdriver.Chrome(service=s)

city = str(input("Enter a city"))

url="https://www.weather-forecast.com/locations/"+city+"/forecasts/latest"
browser.get(url)
browser.maximize_window()

content = browser.find_element(By.CLASS_NAME, "b-forecast__table-description-content")
print(content.text)

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

街道布景 2025-01-27 08:56:34

你足够近。这些内容实际上位于祖先＆lt; p＆gt; 标签的后代＆lt; span＆gt; 中。

要打印所有所需的文本，您必须诱导 webdriverwait a href =“ https://stackoverflow.com/a/64770041/7429447”> visibility_of_All_ELEments_Located（） ，您可以使用以下任何一个 locator策略：

使用 css_selector

  city =“达拉斯”
驱动程序。
打印（[[my_elem.text for my_elem in webdriverwait（驱动程序，20）.until（ec.visibility_of_all_elements_located（（（by.csss_selector）

使用 xpath ：

  city =“达拉斯”
驱动程序。
print（[[my_elem.get_attribute（“ innertext”）for my_elem在webdriverwait中（驱动程序，20）.until（ec.visibility_of_all_elements_located） /span [@class ='phrase']”））））））））

控制台输出：

  ['大雨（总雨（总计0.8英寸）），在周二之夜最重。温暖（周一下午最大86°F，在周二的夜晚最小66°F）。风降低（在阳光之夜从S起新鲜风，S -Son Night的浅风）。”，“大雨（总数为0.3英寸），大部分是在周五的早晨掉落。温暖（周三下午，最大77°F，在星期三晚上最小57°F）。风通常会轻。温暖（周六下午最大84°F，在阳光之夜最小43°F）。风减少了（阳光下的下午，北风的新风，在周一晚上平静下来）。温暖（星期三下午最大70°F，在周二的夜晚最小48°F）。风通常会轻。”]

注意：您必须添加以下导入：

 来自selenium.webdriver.support.ui导入webdriverwait
从selenium.webdriver.common.通过进口
从selenium.webdriver.support进口预期_conditions作为ec

You were close enough. The contents are actually within the descendant <span> of the ancestor <p> tags.

To print all the desired texts you have to induce WebDriverWait for the visibility_of_all_elements_located() and you can use either of the following Locator Strategies:

Using CSS_SELECTOR:

city = "Dallas"
driver.get("https://www.weather-forecast.com/locations/"+city+"/forecasts/latest")
print([my_elem.text for my_elem in WebDriverWait(driver, 20).until(EC.visibility_of_all_elements_located((By.CSS_SELECTOR, "p.b-forecast__table-description-content > span.phrase")))])

Using XPATH:

city = "Dallas"
driver.get("https://www.weather-forecast.com/locations/"+city+"/forecasts/latest")
print([my_elem.get_attribute("innerText") for my_elem in WebDriverWait(driver, 20).until(EC.visibility_of_all_elements_located((By.XPATH, "//p[@class='b-forecast__table-description-content']/span[@class='phrase']")))])

Console Output:

['Heavy rain (total 0.8in), heaviest during Tue night. Warm (max 86°F on Mon afternoon, min 66°F on Tue night). Winds decreasing (fresh winds from the S on Sun night, light winds from the S by Mon night).', 'Light rain (total 0.3in), mostly falling on Fri morning. Warm (max 77°F on Wed afternoon, min 57°F on Wed night). Wind will be generally light.', 'Light rain (total 0.1in), mostly falling on Sat night. Warm (max 84°F on Sat afternoon, min 43°F on Sun night). Winds decreasing (fresh winds from the N on Sun afternoon, calm by Mon night).', 'Mostly dry. Warm (max 70°F on Wed afternoon, min 48°F on Tue night). Wind will be generally light.']

Note : You have to add the following imports :

from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC

回复收藏 0 原文

~没有更多了~