擅长:python、mysql、java
<p>这是因为您在一个未被转换的字符串中使用了<code>\</code>。尝试在字符串前面使用<code>\\</code>或put和<code>r</code></p>
<p>您也可以使用pathlib,我发现这更容易:</p>
<pre class="lang-py prettyprint-override"><code>from pathlib import Path
import requests
filename = Path(r'C:\Users\User\PycharmProjects\PDFTest\FolderTest\dummy.pdf')
url = 'https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf'
response = requests.get(url)
filename.write_bytes(response.content)
</code></pre>