安装高版本pyqt5之后，如何解决spyder打不开的问题_pyqt 后 spyder

起初pip install PyQt5，pip install PyQt5-tools，均会出现报错：

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
spyder 5.1.5 requires pyqtwebengine<5.13, which is not installed.
spyder 5.1.5 requires pyqt5<5.13, but you have pyqt5 5.15.6 which is incompatible.
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之后我的spyder就打不开了 也不提示任何内容

这是因为spyder和高版本的pyqt5不兼容。

此时，只能先

pip uninstall pyqt5
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pip uninstall pyqt5-tools 
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卸载掉已安装的高版本pyqt

之后安装规定选择适合版本进行安装

此处使用清华源快速安装

pip3 install pyqt5==5.12.3 -i https://pypi.tuna.tsinghua.edu.cn/simple

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pip3 install pyqtwebengine==5.12.1 -i https://pypi.tuna.tsinghua.edu.cn/simple

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pip3 install typed-ast -i https://pypi.tuna.tsinghua.edu.cn/simple

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之后，就可以打开spyder了