问题描述

使用pip安装 某些包时，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 pyqt5<5.13, which is not installed.
spyder 5.1.5 requires pyqtwebengine<5.13, which is not installed.
conda-repo-cli 1.0.4 requires pathlib, which is not installed.
anaconda-project 0.10.2 requires ruamel-yaml, which is not installed.

原因

pip的依赖项解析器当前未考虑安装的所有包。此行为是以下依赖项冲突的根源。

因此是安装包的版本不兼容

重新安装对应版本就好了

解决办法

根据错误提示，分别重新安装符合版本要求的包，把代码附上：

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple  " pyqt5<5.13"
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple  " pyqtwebengine<5.13"
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple  pathlib
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple   ruamel-yaml

参考：

https://blog.csdn.net/qq_27052367/article/details/125367562