python-3.x - 如何使用 selenium 和 python 在 `::before` 部分中获取文本？
问题描述
我想访问课后存储::before的文本。variant__available-qty在示例中为“14”。
当我尝试：
variants = driver.find_elements_by_class_name("variant__available-qty")
或者
variants = driver.find_elements_by_class_name("variants__container-item")
它以一个空列表作为响应，尽管应该至少有三个元素。我尝试执行一些 JS 脚本（driver.execute_script(...)）但没有成功。
<div class="variants__container">
<div class="variants__container-headers">
<div class="variants__header--item">Rozmiar</div>
<div class="variants__header--qty">Wybierz ilość</div>
</div>
<div class="variants__container-items">
<div id="variant__70224" class="variants__container-item">
<div class="variant__price">
<div class="price">71.27 zł</div>
</div>
<div class="variant__item">
<div class="variant__attributes">35-37 </div>
<div class="variant__sku">610306143389</div>
</div>
<div class="variant__qty">
<form method="post" action="https://b2b.snapoutdoor.pl/checkout/cart/add/uenc/aHR0cHM6Ly9iMmIuc25hcG91dGRvb3IucGwvL3Jlc3QvVjEvZXh0ZW5kdmFyaWFudHN0b2NhcnQvODY1NDY_Xz0xNjAyMzE4NzI4Nzcz/product/86546/">
<div class="qty">
<div class="qty-down">-</div>
<input type="number" name="qty" data-productid="70224" onfocus="this.value=''" value="0" min="0">
<div class="qty-up">+</div>
</div>
<input type="hidden" name="super_attribute[233]" value="2028"><input type="hidden" name="form_key" value="OPk3fByYxbAMTgnu"><button disabled="" class="add-to-cart action primary" type="submit">Do koszyka</button>
</form>
</div>
<div class="variant__available-qty">12</div>
</div>
<div id="variant__70225" class="variants__container-item">
<div class="variant__price">
<div class="price">71.27 zł</div>
</div>
<div class="variant__item">
<div class="variant__attributes">38-40 </div>
<div class="variant__sku">610306143396</div>
</div>
<div class="variant__qty">
<form method="post" action="https://b2b.snapoutdoor.pl/checkout/cart/add/uenc/aHR0cHM6Ly9iMmIuc25hcG91dGRvb3IucGwvL3Jlc3QvVjEvZXh0ZW5kdmFyaWFudHN0b2NhcnQvODY1NDY_Xz0xNjAyMzE4NzI4Nzcz/product/86546/">
<div class="qty">
<div class="qty-down">-</div>
<input type="number" name="qty" data-productid="70225" onfocus="this.value=''" value="0" min="0">
<div class="qty-up">+</div>
</div>
<input type="hidden" name="super_attribute[233]" value="2036"><input type="hidden" name="form_key" value="OPk3fByYxbAMTgnu"><button disabled="" class="add-to-cart action primary" type="submit">Do koszyka</button>
</form>
</div>
<div class="variant__available-qty">14</div>
</div>
<div id="variant__70226" class="variants__container-item">
<div class="variant__price">
<div class="price">71.27 zł</div>
</div>
<div class="variant__item">
<div class="variant__attributes">41-43 </div>
<div class="variant__sku">610306143402</div>
</div>
<div class="variant__qty">
<form method="post" action="https://b2b.snapoutdoor.pl/checkout/cart/add/uenc/aHR0cHM6Ly9iMmIuc25hcG91dGRvb3IucGwvL3Jlc3QvVjEvZXh0ZW5kdmFyaWFudHN0b2NhcnQvODY1NDY_Xz0xNjAyMzE4NzI4Nzcz/product/86546/">
<div class="qty">
<div class="qty-down">-</div>
<input type="number" name="qty" data-productid="70226" onfocus="this.value=''" value="0" min="0">
<div class="qty-up">+</div>
</div>
<input type="hidden" name="super_attribute[233]" value="2042"><input type="hidden" name="form_key" value="OPk3fByYxbAMTgnu"><button disabled="" class="add-to-cart action primary" type="submit">Do koszyka</button>
</form>
</div>
<div class="variant__available-qty">6</div>
</div>
</div>
</div>
解决方案
你可以简单地使用BeautifulSoup这个：
from bs4 import BeautifulSoup
html = """
<div class="variants__container">
<div class="variants__container-headers">
<div class="variants__header--item">Rozmiar</div>
<div class="variants__header--qty">Wybierz ilość</div>
</div>
<div class="variants__container-items">
<div id="variant__70224" class="variants__container-item">
<div class="variant__price">
<div class="price">71.27 zł</div>
</div>
<div class="variant__item">
<div class="variant__attributes">35-37 </div>
<div class="variant__sku">610306143389</div>
</div>
<div class="variant__qty">
<form method="post" action="https://b2b.snapoutdoor.pl/checkout/cart/add/uenc/aHR0cHM6Ly9iMmIuc25hcG91dGRvb3IucGwvL3Jlc3QvVjEvZXh0ZW5kdmFyaWFudHN0b2NhcnQvODY1NDY_Xz0xNjAyMzE4NzI4Nzcz/product/86546/">
<div class="qty">
<div class="qty-down">-</div>
<input type="number" name="qty" data-productid="70224" onfocus="this.value=''" value="0" min="0">
<div class="qty-up">+</div>
</div>
<input type="hidden" name="super_attribute[233]" value="2028"><input type="hidden" name="form_key" value="OPk3fByYxbAMTgnu"><button disabled="" class="add-to-cart action primary" type="submit">Do koszyka</button>
</form>
</div>
<div class="variant__available-qty">12</div>
</div>
<div id="variant__70225" class="variants__container-item">
<div class="variant__price">
<div class="price">71.27 zł</div>
</div>
<div class="variant__item">
<div class="variant__attributes">38-40 </div>
<div class="variant__sku">610306143396</div>
</div>
<div class="variant__qty">
<form method="post" action="https://b2b.snapoutdoor.pl/checkout/cart/add/uenc/aHR0cHM6Ly9iMmIuc25hcG91dGRvb3IucGwvL3Jlc3QvVjEvZXh0ZW5kdmFyaWFudHN0b2NhcnQvODY1NDY_Xz0xNjAyMzE4NzI4Nzcz/product/86546/">
<div class="qty">
<div class="qty-down">-</div>
<input type="number" name="qty" data-productid="70225" onfocus="this.value=''" value="0" min="0">
<div class="qty-up">+</div>
</div>
<input type="hidden" name="super_attribute[233]" value="2036"><input type="hidden" name="form_key" value="OPk3fByYxbAMTgnu"><button disabled="" class="add-to-cart action primary" type="submit">Do koszyka</button>
</form>
</div>
<div class="variant__available-qty">14</div>
</div>
<div id="variant__70226" class="variants__container-item">
<div class="variant__price">
<div class="price">71.27 zł</div>
</div>
<div class="variant__item">
<div class="variant__attributes">41-43 </div>
<div class="variant__sku">610306143402</div>
</div>
<div class="variant__qty">
<form method="post" action="https://b2b.snapoutdoor.pl/checkout/cart/add/uenc/aHR0cHM6Ly9iMmIuc25hcG91dGRvb3IucGwvL3Jlc3QvVjEvZXh0ZW5kdmFyaWFudHN0b2NhcnQvODY1NDY_Xz0xNjAyMzE4NzI4Nzcz/product/86546/">
<div class="qty">
<div class="qty-down">-</div>
<input type="number" name="qty" data-productid="70226" onfocus="this.value=''" value="0" min="0">
<div class="qty-up">+</div>
</div>
<input type="hidden" name="super_attribute[233]" value="2042"><input type="hidden" name="form_key" value="OPk3fByYxbAMTgnu"><button disabled="" class="add-to-cart action primary" type="submit">Do koszyka</button>
</form>
</div>
<div class="variant__available-qty">6</div>
</div>
</div>
</div>
""" # The html code
soup = BeautifulSoup(html,'html5lib')
divs = soup.find_all('div',class_ = 'variant__available-qty')
for div in divs:
print(div.text)
输出：
12
14
6
就我而言，我已经对 html 进行了硬编码。但是您可以使用 .提取网页的 html 代码driver.page_source。然后您可以将该 html 转换为BeautifulSoup对象并执行这些操作。如果您仍想使用 selenium，请尝试使用xpathsorcss selectors代替class_names. 希望这会有所帮助！
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