解决PackagesNotFoundError: The following packages are not available from current channels:问题

问题描述：用tensorflow环境运行jupyter时显示没有skimage包:no module named 'skimage',用conda终端下载skimage包

activate tensorflow39(我的虚拟环境名字)
conda install skimage

显示：

Solving environment: failed with initial frozen solve. Retrying with flexible solve.

PackagesNotFoundError: The following packages are not available from current channels:

- skimage

尝试方法如下：没有用

conda config --add channels conda-forge

• 打开anaconda3 

• 切换到你要下载包的环境

• 选择not install 

• 右上角搜索你要下载的包 

•  点击前面的小方格，选中要安装的包

•  右下角apply

•  等加载出来点击apply,等待它下载完就好啦，底部可以看下载进度