首先,你要在哪个环境下安装,就激活哪个环境
1.安装sklearn注意!!!conda install时,输入的不是sklearn,而是scikit-learn,即
conda install scikit-learn2.安装graphviz
注意!!!不能仅仅安装graphviz,python-graphviz也需要,即
conda install graphviz
conda install python-graphviz3.结果就ok了呀

首先,你要在哪个环境下安装,就激活哪个环境
1.安装sklearn注意!!!conda install时,输入的不是sklearn,而是scikit-learn,即
conda install scikit-learn2.安装graphviz
注意!!!不能仅仅安装graphviz,python-graphviz也需要,即
conda install graphviz
conda install python-graphviz3.结果就ok了呀