INFO: pip is looking at multiple versions of sanic to determine which version is compatible with other requirements. This could take a while.
INFO: This is taking longer than usual. You might need to provide the dependency resolver with stricter constraints to reduce runtime. If you want to abort this run, you can press Ctrl + C to do so. To improve how pip performs, tell us what happened here: https://pip.pypa.io/surveys/backtracking
参考：https://blog.csdn.net/weixin_35757704/article/details/122269142，改为如下，很快安装完成！
pip3 install -U --user pip && pip3 install spyder -i https://pypi.org/simple
Spyder5.4.3 现在也很吃内存！Spyder+4个Python进程，占用了886.89M。
8G内存的机器不够看了！
另一个参考：
https://blog.csdn.net/weixin_47542175/article/details/122380430
原文地址:https://blog.csdn.net/appmathw/article/details/130983443
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