如何用Selenium跳过Python中“无法找到具有类名的元素”错误

Question

下面的代码做了我需要它做的事情，除非它遇到一个缺少class_name的产品，比如说product-price。我需要帮助的是如何跳过那个特定的项目，转移到下一个项目。目前我得到以下错误：

import csv
from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException

b = open('csv/homedepotfridges.csv', 'w', newline='')
a = csv.writer(b,delimiter=',')

driver = webdriver.PhantomJS()
driver.get('https://www.homedepot.ca/en/home/categories/appliances/dishwashers.html#!p=0&q=*%3Aprice-asc%3AcategoryPathHierarchy%3A2%2Fhd-classes%2Fl1-appliances%2Fl2-dishwashers')
items = []

for item in driver.find_elements_by_class_name('item'):
    try:
        model = item.find_element_by_class_name('product-model')
        price = item.find_element_by_class_name('product-display-price')
        title = item.find_element_by_class_name('product-title')
        url = item.find_element_by_class_name('js-detail-link')

        items.append({'model': model, 'price': price, 'title': title, 'url': url})
        print (model.text, price.text, title.text, url.get_attribute("href"))
        c = (model.text, price.text, title.text, url.get_attribute("href"))
        a.writerow(c)

    except NoSuchElementException:
        model = 'n/a'
        price = 'N/A'
        title = 'N/A'
        url = 'N/A'
        items.append({'model': model, 'price': price, 'title': title, 'url': url})
        print(model.text, price.text, title.text, url.get_attribute("href").text)
        c = (model.text, price.text, title.text, url.get_attribute("href"))
    a.writerow(c)


b.close()

Traceback（最近调用最后）：文件“/users/user/pycharmprojects/test/homedepotdishwashers.py”，第31行，打印（model.text,price.text,title.text,url.get_attribute.text（“href”））AttributeError:'str'对象没有属性'text'

感谢任何帮助

Answer 1

有几种方法可以做到这一点。你试过吗？

1）用try包围行-除了https://docs.python.org/3/tutorial/errors.html

from selenium.common.exceptions import NoSuchElementException

for item in driver.find_elements_by_class_name('item'):
    try:
        model = item.find_element_by_class_name('product-model')
        price = item.find_element_by_class_name('product-display-price')
        title = item.find_element_by_class_name('product-title')
        url = item.find_element_by_class_name('js-detail-link')

        items.append({'model': model, 'price': price, 'title': title, 'url': url})
        print (model.text, price.text, title.text, url.get_attribute("href"))
        c = (model.text, price.text, title.text, url.get_attribute("href"))
        a.writerow(c)
    except NoSuchElementException:
        #here you can do what you want to do when an element is not found. Then it'll continue with the next one.

b.close()

2）使用if语句检查是否找到了该项。为此，您可以将所有这些元素列成一个列表(find_elements_by_...)，并查看该列表的长度是否大于0。例如：