如何获取文本：“此文本”
这是我尝试过的：
elem = browser.find_element_by_css_selector('td.mainContent > a')
print(elem.text)
这让我感到非常困惑，因为我确定可以找到该a的文本，但是没有找到。（我没有遇到任何困难，..这很奇怪）
html代码：（搜索“此文本”以在html中找到它。）
<tbody>
<tr class="dbaListing listing hasInsertionFee">
<td class="pictureColumn" colspan="1">
<div class="thumbnailContainer">
<a class="thumbnailContainerInner" href="http://www.dba.dk/tastatur-mad-catz-strike-7/id-1029751995/">
<img class="thumbnail lazy image-placeholder" alt="Tastatur, Mad Catz, Strike 7, Perfekt, Den er helt ny, stadig i fuld indpakning.
Hvorfor sælger jeg?
Jeg opdagede at jeg havde skaffet det forkerte tastetur, der var ment som gave. Og siden at jeg havde ventet for længe med at få den byttet, var det altså for sent. Derfor sælger jeg den så for 1900 kr. (300 mindre en nypris)
Den er virkelig alle pengene værd, og har så mange funktioner, at jeg aldrig kan komme tæt på at beskrive alt her. Derfor hvis i er interesserede i den kan i..." data-original="http://dbastatic.dk/pictures/pictures/3d/05/e060-37f5-4465-af3e-d20e730a9853.jpg?preset=srpgallery" src="http://dbastatic.dk/pictures/pictures/3d/05/e060-37f5-4465-af3e-d20e730a9853.jpg?preset=srpgallery" style="display: block;">
</a>
</div>
</td>
<td class="mainContent" colspan="2">
<script type="application/ld+json">
{
"@context": "http://schema.org",
"@type": "Product",
"name": "Tastatur, Mad Catz, Strike 7, Perfekt, Den er...",
"image": "http://dbastatic.dk/pictures/pictures/3d/05/e060-37f5-4465-af3e-d20e730a9853.jpg?preset=medium",
"url": "http://www.dba.dk/tastatur-mad-catz-strike-7/id-1029751995/",
"offers": {
"@type": "Offer",
"priceCurrency": "DKK",
"price": "1900"
}
}
</script>
<a class="listingLink" href="http://www.dba.dk/tastatur-mad-catz-strike-7/id-1029751995/">
<span class="headline-block">
</span>
</a>
<div class="expandable-box expandable-box-collapsed">
<a class="listingLink" href="http://www.dba.dk/tastatur-mad-catz-strike-7/id-1029751995/">THIS TEXT</a>
<a class="link-to-listing" href="http://www.dba.dk/tastatur-mad-catz-strike-7/id-1029751995/">Se hele annoncen</a>
</div>
<ul class="details">
<li>
<span>1.900 kr.</span>
</li>
</ul>
</td>
<td>
<span>129</span></td>
<td>
<span>9 dage</span></td>
<td>0</td>
<td>
<div class="listingUpselling bump-up-upsell">
<p>
Er nu på side <b>57</b>.
</p>
<p><a href="/produkt-tilvalg/?id=1029751995&produktId=BumpUp&returnUrl=http%3A%2F%2Fwww.dba.dk%2Fmin-dbadk%2F" rel="nofollow" data-ga-act="bumpup-upsell-page-number-click" data-ga-lbl="tenzing-project" class="upsellingButton btn btn-small trackClicks">Køb oprykning</a></p>
</div>
</td>
<td class="noWrap myDbaActions">
<ul class="unstyled">
<li>
<a href="/rediger-annonce/?id=1029751995" data-ga-act="EditAdBegin" data-ga-lbl="" class="trackClicks">Rediger</a>
</li>
<li>
<a href="#" onclick="Dba.MyDba.MyListings.inactivateListing('/ajax/my-dba/MyDba/InActivateListing', 1029751995); return false; ">Deaktiver</a>
</li>
<li>
<a href="#" data-ga-act="DeleteAdBegin" data-ga-lbl="" onclick="Dba.MyDba.MyListings.deleteListing('/ajax/my-dba/MyDba/DeleteListing', 1029751995); return false;" class="trackClicks">Slet</a>
</li>
<li>
<a href="/paypal/anmodning/?externalid=1029751995" data-ga-act="click" data-ga-lbl="paypal-request-payment" class="trackClicks">Start PayPal</a>
</li>
<li>
<a href="/fragt/1029751995/" data-ga-act="shipping-buy-label" data-ga-lbl="shipping" class="trackClicks">Køb pakkelabel</a>
</li>
</ul>
</td>
</tr>
<tr class="dbaListing listing hasInsertionFee">
<td class="pictureColumn" colspan="1">
<div class="thumbnailContainer">
<a class="thumbnailContainerInner" href="http://www.dba.dk/dykkerur-akribos-xxiv-test/id-1030155633/">
<img class="thumbnail lazy image-placeholder" alt="Dykkerur, Akribos XXIV, test" data-original="http://dbastatic.dk/pictures/pictures/41/0d/7053-631b-4ba6-b520-cb0cbdd67b29.jpg?preset=srpgallery" src="http://dbastatic.dk/pictures/pictures/41/0d/7053-631b-4ba6-b520-cb0cbdd67b29.jpg?preset=srpgallery" style="display: block;">
</a>
</div>
</td>
<td class="mainContent" colspan="2">
<script type="application/ld+json">
{
"@context": "http://schema.org",
"@type": "Product",
"name": "Dykkerur, Akribos XXIV, test",
"image": "http://dbastatic.dk/pictures/pictures/41/0d/7053-631b-4ba6-b520-cb0cbdd67b29.jpg?preset=medium",
"url": "http://www.dba.dk/dykkerur-akribos-xxiv-test/id-1030155633/",
"offers": {
"@type": "Offer",
"priceCurrency": "DKK",
"price": "9999"
}
}
</script>
<a class="listingLink" href="http://www.dba.dk/dykkerur-akribos-xxiv-test/id-1030155633/">
<span class="headline-block">
</span>
</a>
<div class="expandable-box expandable-box-collapsed">
<a class="listingLink" href="http://www.dba.dk/dykkerur-akribos-xxiv-test/id-1030155633/">Dykkerur, Akribos XXIV, test</a>
<a class="link-to-listing" href="http://www.dba.dk/dykkerur-akribos-xxiv-test/id-1030155633/">Se hele annoncen</a>
</div>
<ul class="details">
<li>
<span>9.999 kr.</span>
</li>
</ul>
</td>
<td>
<span>47</span></td>
<td>
<span>29 dage</span></td>
<td>0</td>
<td>
<div class="listingUpselling bump-up-upsell">
<p>
Er nu på side <b>8</b>.
</p>
<p><a href="/produkt-tilvalg/?id=1030155633&produktId=BumpUp&returnUrl=http%3A%2F%2Fwww.dba.dk%2Fmin-dbadk%2F" rel="nofollow" data-ga-act="bumpup-upsell-page-number-click" data-ga-lbl="tenzing-project" class="upsellingButton btn btn-small trackClicks">Køb oprykning</a></p>
</div>
</td>
<td class="noWrap myDbaActions">
<ul class="unstyled">
<li>
<a href="/rediger-annonce/?id=1030155633" data-ga-act="EditAdBegin" data-ga-lbl="" class="trackClicks">Rediger</a>
</li>
<li>
<a href="#" onclick="Dba.MyDba.MyListings.inactivateListing('/ajax/my-dba/MyDba/InActivateListing', 1030155633); return false; ">Deaktiver</a>
</li>
<li>
<a href="#" data-ga-act="DeleteAdBegin" data-ga-lbl="" onclick="Dba.MyDba.MyListings.deleteListing('/ajax/my-dba/MyDba/DeleteListing', 1030155633); return false;" class="trackClicks">Slet</a>
</li>
<li>
<a href="/paypal/anmodning/?externalid=1030155633" data-ga-act="click" data-ga-lbl="paypal-request-payment" class="trackClicks">Start PayPal</a>
</li>
<li>
<a href="/fragt/1030155633/" data-ga-act="shipping-buy-label" data-ga-lbl="shipping" class="trackClicks">Køb pakkelabel</a>
</li>
</ul>
</td>
</tr>
<tr class="dbaListing listing hasInsertionFee">
<td class="pictureColumn" colspan="1">
<div class="thumbnailContainer">
<a class="thumbnailContainerInner" href="http://www.dba.dk/dykkerur-adidas-test/id-1030155766/">
<img class="thumbnail lazy image-placeholder" alt="Dykkerur, Adidas, test" data-original="http://dbastatic.dk/pictures/pictures/6d/45/bee3-8bb7-4e0b-9cb4-4c75ebea7ac2.jpg?preset=srpgallery" src="http://dbastatic.dk/pictures/pictures/6d/45/bee3-8bb7-4e0b-9cb4-4c75ebea7ac2.jpg?preset=srpgallery" style="display: block;">
</a>
</div>
</td>
<td class="mainContent" colspan="2">
<script type="application/ld+json">
{
"@context": "http://schema.org",
"@type": "Product",
"name": "Dykkerur, Adidas, test",
"image": "http://dbastatic.dk/pictures/pictures/6d/45/bee3-8bb7-4e0b-9cb4-4c75ebea7ac2.jpg?preset=medium",
"url": "http://www.dba.dk/dykkerur-adidas-test/id-1030155766/",
"offers": {
"@type": "Offer",
"priceCurrency": "DKK",
"price": "9999"
}
}
</script>
<a class="listingLink" href="http://www.dba.dk/dykkerur-adidas-test/id-1030155766/">
<span class="headline-block">
</span>
</a>
<div class="expandable-box expandable-box-collapsed">
<a class="listingLink" href="http://www.dba.dk/dykkerur-adidas-test/id-1030155766/">Dykkerur, Adidas, test</a>
<a class="link-to-listing" href="http://www.dba.dk/dykkerur-adidas-test/id-1030155766/">Se hele annoncen</a>
</div>
<ul class="details">
<li>
<span>9.999 kr.</span>
</li>
</ul>
</td>
<td>
<span>51</span></td>
<td>
<span>29 dage</span></td>
<td>0</td>
<td>
<div class="listingUpselling bump-up-upsell">
<p>
Er nu på side <b>8</b>.
</p>
<p><a href="/produkt-tilvalg/?id=1030155766&produktId=BumpUp&returnUrl=http%3A%2F%2Fwww.dba.dk%2Fmin-dbadk%2F" rel="nofollow" data-ga-act="bumpup-upsell-page-number-click" data-ga-lbl="tenzing-project" class="upsellingButton btn btn-small trackClicks">Køb oprykning</a></p>
</div>
</td>
<td class="noWrap myDbaActions">
<ul class="unstyled">
<li>
<a href="/rediger-annonce/?id=1030155766" data-ga-act="EditAdBegin" data-ga-lbl="" class="trackClicks">Rediger</a>
</li>
<li>
<a href="#" onclick="Dba.MyDba.MyListings.inactivateListing('/ajax/my-dba/MyDba/InActivateListing', 1030155766); return false; ">Deaktiver</a>
</li>
<li>
<a href="#" data-ga-act="DeleteAdBegin" data-ga-lbl="" onclick="Dba.MyDba.MyListings.deleteListing('/ajax/my-dba/MyDba/DeleteListing', 1030155766); return false;" class="trackClicks">Slet</a>
</li>
<li>
<a href="/paypal/anmodning/?externalid=1030155766" data-ga-act="click" data-ga-lbl="paypal-request-payment" class="trackClicks">Start PayPal</a>
</li>
<li>
<a href="/fragt/1030155766/" data-ga-act="shipping-buy-label" data-ga-lbl="shipping" class="trackClicks">Køb pakkelabel</a>
</li>
</ul>
</td>
</tr>
<tr class="dbaListing listing lastListing hasInsertionFee">
<td class="pictureColumn" colspan="1">
<div class="thumbnailContainer">
<a class="thumbnailContainerInner" href="http://www.dba.dk/joystick-l-h-defekt-test/id-1030156328/">
<img class="thumbnail lazy image-placeholder" alt="Joystick, l, h, Defekt, test" data-original="http://dbastatic.dk/pictures/pictures/25/48/8637-94be-42b8-a809-ed69822a40e4.jpg?preset=srpgallery" src="http://dbastatic.dk/pictures/pictures/25/48/8637-94be-42b8-a809-ed69822a40e4.jpg?preset=srpgallery" style="display: block;">
</a>
</div>
</td>
<td class="mainContent" colspan="2">
<script type="application/ld+json">
{
"@context": "http://schema.org",
"@type": "Product",
"name": "Joystick, l, h, Defekt, test",
"image": "http://dbastatic.dk/pictures/pictures/25/48/8637-94be-42b8-a809-ed69822a40e4.jpg?preset=medium",
"url": "http://www.dba.dk/joystick-l-h-defekt-test/id-1030156328/",
"offers": {
"@type": "Offer",
"priceCurrency": "DKK",
"price": "900"
}
}
</script>
<a class="listingLink" href="http://www.dba.dk/joystick-l-h-defekt-test/id-1030156328/">
<span class="headline-block">
</span>
</a>
<div class="expandable-box expandable-box-collapsed">
<a class="listingLink" href="http://www.dba.dk/joystick-l-h-defekt-test/id-1030156328/">Joystick, l, h, Defekt, test</a>
<a class="link-to-listing" href="http://www.dba.dk/joystick-l-h-defekt-test/id-1030156328/">Se hele annoncen</a>
</div>
<ul class="details">
<li>
<span>900 kr.</span>
</li>
</ul>
</td>
<td>
<span>44</span></td>
<td>
<span>29 dage</span></td>
<td>0</td>
<td>
<div class="listingUpselling bump-up-upsell">
<p>
Er nu på side <b>5</b>.
</p>
<p><a href="/produkt-tilvalg/?id=1030156328&produktId=BumpUp&returnUrl=http%3A%2F%2Fwww.dba.dk%2Fmin-dbadk%2F" rel="nofollow" data-ga-act="bumpup-upsell-page-number-click" data-ga-lbl="tenzing-project" class="upsellingButton btn btn-small trackClicks">Køb oprykning</a></p>
</div>
</td>
<td class="noWrap myDbaActions">
<ul class="unstyled">
<li>
<a href="/rediger-annonce/?id=1030156328" data-ga-act="EditAdBegin" data-ga-lbl="" class="trackClicks">Rediger</a>
</li>
<li>
<a href="#" onclick="Dba.MyDba.MyListings.inactivateListing('/ajax/my-dba/MyDba/InActivateListing', 1030156328); return false; ">Deaktiver</a>
</li>
<li>
<a href="#" data-ga-act="DeleteAdBegin" data-ga-lbl="" onclick="Dba.MyDba.MyListings.deleteListing('/ajax/my-dba/MyDba/DeleteListing', 1030156328); return false;" class="trackClicks">Slet</a>
</li>
<li>
<a href="/paypal/anmodning/?externalid=1030156328" data-ga-act="click" data-ga-lbl="paypal-request-payment" class="trackClicks">Start PayPal</a>
</li>
<li>
<a href="/fragt/1030156328/" data-ga-act="shipping-buy-label" data-ga-lbl="shipping" class="trackClicks">Køb pakkelabel</a>
</li>
</ul>
</td>
</tr>
</tbody>
看来您使用了错误的选择器。请尝试以下操作：
elem = browser.find_element_by_css_selector('div.expandable-box.expandable-box-collapsed > a.listingLink')
print(elem.text)
更新
您的选择器td.mainContent > a指向的直接子级<td class="mainContent">，这是
<a class="listingLink" href="http://www.dba.dk/tastatur-mad-catz-strike-7/id-1029751995/">
<span class="headline-block"></span>
</a>
如您所见，它不包含文本节点
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我来说两句