如何使用嵌套的selenium选择器

我正在使用selenium+chrome web驱动程序加载动态页面:

self.driver.get(url)
time.sleep(3)  # not sure if I need to add this wait, so the .js loads the page?

加载页面后,我希望获得页面上所有可用卡片的列表,然后遍历每张卡片并获取其标题:

cards = self.driver.find_elements_by_css_selector('div.my-card')
for card in cards:
    title = card.find_element_by_css_selector('h2.title::text').get() # <-- does not work
    desc = card.find_element_by_css_selector('div.desc::text').get() # <-- does not work
    # more fields that I need within this card

find_elements_by_css_selector 似乎是一个 driver 方法我不确定如何将这些选择器应用于卡(类型卡为 WebElement ).

示例页:

<div class='my-card'>
    <h2 class='title'>title 1</h2>
    <div class='desc'>desc 1</div>
</div>
<div class='my-card'>
    <h2 class='title'>title 2</h2>
    <div class='desc'>desc 2</div>
</div>
<div class='my-card'>
    <h2 class='title'>title 3</h2>
    <div class='desc'>desc 3</div>
</div>