Using Python and WebDriver to automatically fill in drop-down selection boxes on web pages

Use Python and WebDriver to automatically fill in the drop-down selection box on the web page

Overview:
When conducting automated web page testing or crawler development, you often encounter situations where you need to fill in the drop-down selection box. This article describes how to use Python and WebDriver (such as Selenium) to automatically fill in drop-down selection boxes on web pages. The following takes a simple sample web page as an example to describe the steps and code implementation in detail.

Step 1: Install WebDriver
First, we need to install WebDriver. Here we take Selenium as an example. You can use pip to install through the following command:

pip install selenium

Step 2: Import dependent libraries
Import Selenium’s webdriver and time libraries in the code:

from selenium import webdriver
import time

Step 3: Start WebDriver
By starting WebDriver, open the web page to be operated:

driver = webdriver.Chrome()  # 打开Chrome浏览器
driver.get("https://www.example.com")  # 打开示例网页

Step 4: Locate the drop-down selection box element
Use WebDriver's find_element method to locate the drop-down selection box element and save it in a variable:

select_element = driver.find_element_by_id("select-box")  # 根据id定位下拉选择框元素

Step 5: Select the drop-down option
Select the drop-down box option by executing JavaScript code. Here we assume that we select the second option:

driver.execute_script("arguments[0].selectedIndex = 1;", select_element)  # 选择第二个下拉框选项

Step 6: Submit the selection
Submit the selection to make it effective ：

select_element.submit()  # 提交选择

Step 7: Verify the result
You can verify the success of the operation by printing the selection result:

selected_value = select_element.get_attribute("value")
print("已选中的选项为：", selected_value)

Full code example:

from selenium import webdriver
import time

driver = webdriver.Chrome()
driver.get("https://www.example.com")

select_element = driver.find_element_by_id("select-box")
driver.execute_script("arguments[0].selectedIndex = 1;", select_element)
select_element.submit()

selected_value = select_element.get_attribute("value")
print("已选中的选项为：", selected_value)

driver.quit()

Summary:
Through the above steps and code examples, we can use Python and WebDriver to automatically fill in the drop-down selection box on the web page. This will facilitate our automated testing of web pages and crawler development and improve work efficiency. Of course, the specific implementation method may vary slightly depending on the web page structure and WebDriver version. Please adjust according to the actual situation. I hope this article will be helpful for filling drop-down selection boxes using Python and WebDriver.

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