报错

>pip install skimage                                                                                         
Collecting skimage
note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
note: This is an issue with the package mentioned above, not pip.
note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

原因 

skimage是scikit-image的简称，因此安装skimage时输入skimage的全称即可

解决：

pip install scikit-image