AttributeError: module 'PyQt5.Qt' has no attribute 'KeepAspectRatio'

要解决AttributeError: module 'PyQt5.Qt' has no attribute 'KeepAspectRatio'的问题，可以尝试以下几个步骤：

1. 确保你已经安装了正确的PyQt5版本。首先，运行指令pip uninstall PyQt5卸载当前安装的PyQt5版本。

2. 接下来，再次运行指令pip install --user PyQt5==5.10.1安装PyQt5的低版本。这个版本可能与你的代码兼容，并且可以解决该属性错误。

3. 如果步骤2没有解决问题，可以尝试运行指令pip install PyQt5 --user --use-feature=2020-resolver安装PyQt5并使用2020解析器特性。这可能会帮助解决依赖关系问题。

通过这些步骤，你应该能够解决AttributeError: module 'PyQt5.Qt' has no attribute 'KeepAspectRatio'的问题，并成功运行你的程序。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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