ERROR: pip‘s dependency resolver does not currently take into account all the packages that are inst

安装包的时候出现报错：

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.

distributed 1.21.8 requires msgpack, which is not installed.

conda 4.10.1 requires ruamel_yaml_conda>=0.11.14, which is not installed.

cryptography 3.3.2 requires cffi>=1.12, but you have cffi 1.11.5 which is incompatible.

错误：pip的依赖项解析程序当前未考虑已安装的所有软件包。这种行为是以下依赖冲突的根源。
distributed 1.21.8需要未安装的msgpack。
conda 4.10.1要求ruamel\u yaml\u conda>=0.11.14，但未安装。
密码学3.3.2要求cffi>=1.12，但cffi 1.11.5不兼容。

解决方法：重新安装这两个包就好了

重新安装msgpack

升级cffi为最新即可