使用 selenium 循环 JS 路径选择器

Question

代码：

def page_function():
    driver.get('https://www.se.com/us/en/product-range/63426-powerlogic-accusine-pcs%2B/?N=4176697776&No=12&Nrpp=12')
    driver.maximize_window()
    # gets the amount of items in the search bar
    print("Number of products:", 69)
    # for loop to read the product name and descriptions

    # product = driver.find_element(By.CSS_SELECTOR, ".search-item")
    # product = product.text
    # print(product)
    pr = "]/product-card//article/div/div[2]/div[1]/pes-product-price/p/span[1]"
    nam = "]/product-card//article/div/div[1]/product-card-main-info//div/pes-router-link[1]/a"
    des = ') > product-card").shadowRoot.querySelector("product-card-main-info.hydrated").shadowRoot.querySelector("pes-router-link.description.hydrated a > h3")'

    # des_path = "#search-items > .search-item .details > a > .row.pt-5.pb-sm-5 > .multilines-3.text-truncate-multilines.xs-single-col-8.col-12 > .font-weight-bold.text-dark"
    follow_loop = range(1, 70)
    for x in follow_loop:
        y = x
        if (x > 61):
            y = x - 60
        elif (x > 49):
            y = x - 48
        elif (x > 37):
            y = x - 36
        elif (x > 25):
            y = x - 24
        elif(x > 13):
            y = x - 12
        else:
            print("")
        if ( ((x % 13) == 0) ):
            driver.delete_all_cookies()
            next_arrow = driver.find_element(By.CLASS_NAME, "page-links__arrow page-links__arrow--next js-page-link js-page-link-next")
            driver.execute_script("arguments[0].click();", next_arrow)

        xpath += "return document.querySelector("product-cards-wrapper.hydrated").shadowRoot.querySelector("div > ul > li:nth-child(str(y)) > product-card )
        xpath += str(y)
        xpath += des
        xpath += "'"
        driver.implicitly_wait(10)
        description.append(driver.execute_script(xpath))
        print(description[x].text)
        input("continue??")
        xpath2 = xpath.replace(des, '')
        xpath2 += pr
        unit_price.append(driver.find_element(By.XPATH, xpath2).text)
        xpath3 = xpath2.replace(pr, '')
        xpath3 += nam
        name.append(driver.find_element(By.XPATH, xpath3).text)

错误：

File "C:\Users\....\Documents\web_scrap\main.py", line 65, in page_function
    xpath += 'return document.querySelector("product-cards-wrapper.hydrated").shadowRoot.querySelector("div > ul > li:nth-child('
UnboundLocalError: local variable 'xpath' referenced before assignment

网页： Website

问题：

目前在stack overflow中借助他人的帮助，能够从shadow root中识别出其产品网站上的描述、价格和产品名称。因此，我需要使用 execute_script() 命令才能工作。此外，我能够看到每个元素都位于不同的 dif class 中，这正是我在此代码中尝试做的。但是，这似乎不起作用。有什么想法吗？？

谢谢

Answer 1

xpath += "return document ...

与

相同

xpath = xpath + "return document

但是您还没有定义它，这就是您收到错误 'xpath' referenced before assignment 的原因，您可能只想：

xpath = "return document.querySelector('product-cards-wrapper.hydrated').shadowRoot.querySelector('div > ul > li:nth-child(str(y)) > product-card')"

使用 selenium 循环 JS 路径选择器

for looping a JS path Selector using selenium

javascript

python

automation

for-loop

selenium-webdriver