如何用Selenium和Python点击页面中第二个重复的HTML元素

Let's break down the issues with your current code and fix them step by step:

First, the core problem with your button targeting #

Your line driver.find_element_by_link_text("SHOP NOW")[a] won't work because find_element_by_link_text() returns only the first matching element, not a list. To get all "SHOP NOW" buttons, you need to use find_elements_by_link_text() (note the plural "elements") which returns a list of all matching elements.

Step 1: Get all valid "SHOP NOW" buttons #

First, fetch all the buttons, then filter out the disabled ones (the grayed-out ones from low stock). We can check if a button is enabled by:

• Looking for a disabled class (common for styled disabled buttons, e.g., button-disabled – you may need to inspect the grayed button's HTML to confirm the exact class)
• Checking if the element has a disabled attribute
• Using Selenium's is_enabled() method (though sometimes styled disabled buttons might still return True here, so combining with class checks is safer)

Step 2: Target the second enabled button #

Once we have the list of enabled buttons, we can check if there's at least a second one (index 1, since Python lists are 0-indexed) and click it.

Revised Code #

Here's the adjusted version of your mainclick function with these fixes:

import time
from selenium import webdriver

def mainclick(website):
    while True:
        time.sleep(1)
        # Get all "SHOP NOW" buttons using precise CSS selector matching your button's classes
        shop_now_buttons = driver.find_elements_by_css_selector('a.button-called-out.button-full.facetedResults-cta')
        
        # Filter out disabled buttons (adjust the class check based on your site's actual disabled button HTML)
        enabled_buttons = [btn for btn in shop_now_buttons if 'button-disabled' not in btn.get_attribute('class') and btn.is_enabled()]
        
        # Check if there's at least a second enabled button to click
        if len(enabled_buttons) >= 2:
            try:
                # Click the SECOND enabled button (index 1, since lists are 0-indexed)
                enabled_buttons[1].click()
                time.sleep(3)
                
                # Try adding to cart if possible
                try:
                    add_to_cart_btn = driver.find_element_by_id("addToCartButtonTop")
                    if add_to_cart_btn.is_enabled():
                        add_to_cart_btn.click()
                except Exception as e:
                    print(f"Add to cart failed: {str(e)}")
                finally:
                    # Ensure we return to the results page regardless
                    driver.execute_script("window.history.go(-1)")
            except Exception as e:
                print(f"Couldn't click button: {str(e)}")
        else:
            print("Not enough enabled SHOP NOW buttons on this page")
        
        # Navigate to next page, exit loop if no next page exists
        try:
            driver.find_element_by_link_text("Next Page").click()
        except Exception as e:
            print("No more pages left, exiting loop")
            break

# Initialize driver and run the function
driver = webdriver.Chrome() # Adjust to your driver type
mainweb = "https://www.lenovo.com/us/en/outletus/laptops/c/LAPTOPS?q=%3Aprice-asc%3AfacetSys-Memory%3A16+GB%3AfacetSys-Processor%3AIntel%C2%AE+Core%E2%84%A2+i7%3AfacetSys-Processor%3AIntel%C2%AE+Core%E2%84%A2+i5%3AfacetSys-Memory%3A8+GB&uq=&text=#"
driver.get(mainweb)
mainclick(mainweb)

Key Improvements Explained #

• Precise button targeting: Using find_elements_by_css_selector instead of link text ensures we only grab buttons with your exact target classes, avoiding accidental matches with other "SHOP NOW" text on the page.
• Disabled button filtering: The list comprehension checks for a disabled-specific class (replace button-disabled with the actual class from your grayed-out button's HTML) and verifies the button's interactivity with is_enabled().
• Safe index access: We check if enabled_buttons has at least 2 elements before attempting to click index 1, preventing index-out-of-range errors.
• Robust error handling: Restructured try/except blocks make it clearer where failures might happen, and the finally block ensures we always return to the results page.

Notes for Your Specific Site #

• Inspect the grayed-out "SHOP NOW" button's HTML to find the exact disabled class (e.g., maybe is-disabled or button-inactive), then update the filter condition accordingly.
• If is_enabled() doesn't work for your styled buttons, you can also check if the button's href is a valid product link (disabled buttons often have href="#" or no href attribute).

内容的提问来源于stack exchange，提问作者Bob Stone