如何用Python与Selenium提取dd标签内价格并去除美元符号？

Let’s walk through fixing your code and addressing both scenarios (your specific dd tag with attributes, and dd tags without named attributes):

Issues in Your Current Code #

• find_elements_by_xpath returns a list of elements, not a single element. Calling get_attribute on a list will throw an error—use find_element_by_xpath (singular) instead if targeting one specific element.
• The price you want is the text content of the dd tag, not an attribute value. Use the .text property instead of get_attribute().
• Your XPath is too broad (//dl[@class='dl']//dd) which might match multiple elements. Let’s narrow it down to target the exact dd you need.

Solution for Your Specific dd Tag #

Your dd tag has a unique itemprop="youSave" attribute—we can use that to locate it directly. Here’s the corrected code, including waiting for the element to load (to avoid race conditions with dynamic content):

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

# Initialize driver (adjust based on your browser)
driver = webdriver.Chrome()
driver.get("your_page_url_here")

try:
    # Wait up to 10 seconds for the element to be visible
    price_saved_element = WebDriverWait(driver, 10).until(
        EC.visibility_of_element_located((By.XPATH, "//dd[@itemprop='youSave']"))
    )
    
    # Get the text and remove the dollar sign
    price_saved_text = price_saved_element.text.strip()
    price_without_dollar = price_saved_text.replace("$", "")
    
    print(f"Saved price (without $): {price_without_dollar}")
except Exception as e:
    print(f"Failed to extract price: {str(e)}")
finally:
    driver.quit()

Extracting Text from dd Tags Without Named Attributes #

If you have a dd tag with no unique attributes (no itemprop, class, or id), you can locate it using its position relative to parent elements or sibling tags:

• If it’s the 2nd dd inside a dl with class dl:

  dd_element = driver.find_element(By.XPATH, "//dl[@class='dl']//dd[2]")
  dd_text = dd_element.text.strip()
  

• If it’s immediately after a specific dt tag (e.g., a dt with text "You Save"):

  dd_element = driver.find_element(By.XPATH, "//dt[text()='You Save']/following-sibling::dd[1]")
  dd_text = dd_element.text.strip()
  

These methods let you target even unlabeled dd tags by their context in the HTML structure.

内容的提问来源于stack exchange，提问作者Bob Stone