我一直在开发JavaScript,但是Python对我来说仍然感觉有点新鲜。我试图用Python从一个简单的网页上抓取内容(基本上是一个包含不同部分的产品列表)。内容是动态生成的,因此使用selenium模块。
内容结构与此类似,有几个产品部分:
<div class="product-section">
<div class="section-title">
Product section name
</div>
<ul class="products">
<li class="product">
<div class="name">Wooden Table</div>
<div class="price">99 USD</div>
<div class="color">White</div>
</li>
</ul>
</div>
用于抓取产品的Python代码:
driver = webdriver.Chrome()
driver.get("website.com")
names = driver.find_elements_by_css_selector('div.name')
prices = driver.find_elements_by_css_selector("div.price")
colors = driver.find_elements_by_css_selector('div.color')
allNames = [name.text for name in names]
allPrices = [price.text for price in prices]
allColors = [color.text for color in colors]
现在我获得了所有产品的属性(见下文),但我不能将它们与不同的部分分开。
目前的结果
木桌,99美元,白色
草坪主席,39美元,黑色
帐篷 - 4人,299美元,迷彩
等。
期望的结果:
户外家具
木桌,99美元,白色
草坪主席,39美元,黑色
露营装备
帐篷 - 4人,299美元,迷彩
Thermos,19 USD,Metallic
最终目标是将内容输出到excel产品列表中,因此我需要将这些部分分开(与其匹配的部分标题)。知道如何将它们分开,即使它们具有相同的类名吗?
答案 0 :(得分:1)
您几乎就在那里 - 按部分对产品进行分组,然后从部分开始并找到其中的所有元素。至少你的样本html意味着它的结构允许它。
根据您的代码,这是一个带有解释性注释的解决方案。
driver = webdriver.Chrome()
driver.get('website.com')
# a dict where the key will be the section name
products = {}
# find all top-level sections
sections = driver.find_elements_by_css_selector('div.product-section')
# iterate over each one
for section in sections:
# find the products that are children of this section
# note the find() is based of section, not driver
names = section.find_elements_by_css_selector('div.name')
prices = section.find_elements_by_css_selector('div.price')
colors = section.find_elements_by_css_selector('div.color')
allNames = [name.text for name in names]
allPrices = [price.text for price in prices]
allColors = [color.text for color in colors]
section_name = section.find_element_by_css_selector('div.section-title').text
# add the current scraped section to the products dict
# I'm leaving it to you to match the name, price and color of each ;)
products[section_name] = {'names': allNames,
'prices': allPrices,
'colors': allColors,}
# and here's how to access the result
# get the 1st name in a section:
print(products['Product section name']['names'][0]) # will output "Wooden Table"
# iterate over the sections and products:
for section in products:
print('Section: {}'.format(section))
print('All prices in the section:')
for price in section['prices']:
print(price)