Home Web Front-end JS Tutorial Guide to reading web page elements

Guide to reading web page elements

Apr 09, 2024 pm 12:39 PM
php python java programming webdriver

To read web page elements using Python, follow these steps: Import the webdriver from the Selenium library. Launch a browser such as Chrome Driver. Use the find_element_by_* methods to find web page elements. Use element.text to read element text. Use element.get_attribute() to read element attributes. Use element.location and element.size to read element position and size.

Guide to reading web page elements

Web page element reading guide

Web page element reading is a key task for website automation and data extraction. This article will guide you how to read the text, attributes and position of web page elements using Python and Selenium.

Import the necessary libraries

from selenium import webdriver
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Start the browser

driver = webdriver.Chrome()  # 或其他浏览器驱动程序
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Find web page elements

Find the element using Selenium's find_element_by_* method:

  • find_element_by_id("my_id")
  • find_element_by_name ("my_name")
  • find_element_by_class_name("my_class")
  • find_element_by_xpath("//element/path")

Read element text

text = element.text
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Read element attribute

value = element.get_attribute("attribute_name")
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Read element position

location = element.location  # 返回 {x, y} 坐标
size = element.size  # 返回 {width, height}
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Practical example

Extract movie titles and ratings from the IMDb website:

# 打开 IMDb 网站
driver.get("https://www.imdb.com/")

# 获取前 10 部电影的标题和评分
titles = []
ratings = []
for i in range(1, 11):
    # 查找标题元素
    title_element = driver.find_element_by_xpath(f"(//h3)[{i}]/a")
    # 读标题
    title = title_element.text

    # 查找评分元素
    rating_element = driver.find_element_by_xpath(f"(//strong)[{i}]")
    # 读评分
    rating = rating_element.text

    titles.append(title)
    ratings.append(rating)

# 打印结果
for title, rating in zip(titles, ratings):
    print(f"{title}: {rating}")
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This will print results similar to the following:

The Shawshank Redemption: 9.3
The Godfather: 9.2
The Dark Knight: 9.0
Schindler's List: 9.0
12 Angry Men: 9.0
...
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