<p>来自官方<a href="https://docs.python.org/3/using/windows.html#finding-the-python-executable" rel="nofollow noreferrer">Docs</a></p>
<p>这样做</p>
<p><strong>修改现有安装:</strong></p>
<p>重新运行安装程序(例如,在下载中,python-3.8.4.exe)并选择“修改”。
检查所有需要的可选功能(可能没有更改),然后单击[下一步]。选中[x]“将Python添加到环境变量”和[Install]。
<a href="https://i.stack.imgur.com/gRyw8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gRyw8.png" alt="enter image description here"/></a></p>
<h2>更新</h2>
<p>注:</p>
<p>我从屏幕截图上看到您正在安装64位Python,您的窗口是什么版本</p>
<p>如果是32位,那么只需转到<a href="https://www.python.org/downloads/windows/" rel="nofollow noreferrer">here</a>并获取32位(<a href="https://www.python.org/ftp/python/3.8.7/python-3.8.7-embed-win32.zip" rel="nofollow noreferrer">32 bit here</a>)</p>
<p><a href="https://i.stack.imgur.com/oqLab.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/oqLab.png" alt="enter image description here"/></a></p>
<h2>以Amministrator的身份运行安装程序</h2>
<ul>
<li><a href="https://superuser.com/questions/203068/have-windows-run-dialog-run-as-admin">Have Windows “Run” dialog run as Admin?</a></li>
<li><a href="https://www.itechtics.com/run-programs-administrator/" rel="nofollow noreferrer">How To Run Programs As Administrator In Windows 10</a></li>
</ul>
<hr/>
<p>如果仍然出现错误,请手动转到您的文件夹,根据屏幕截图,路径应为:</p>
<pre><code>C:\Users\Timur\AppData\Local\Programs\Python\
</code></pre>
<p>按照此说明操作</p>
<h2><strong><a href="https://stackoverflow.com/questions/3701646/how-to-add-to-the-pythonpath-in-windows-so-it-finds-my-modules-packages">How to add to the PYTHONPATH in Windows, so it finds my modules/packages?</a></strong></h2>
<p><strong>添加</strong></p>
<pre><code>C:\Users\Timur\AppData\Local\Programs\Python\Python39\
</code></pre>
<p><strong>和</strong></p>
<pre><code>C:\Users\Timur\AppData\Local\Programs\Python\Python39\Scripts\
</code></pre>