UnsatisfiableError: The following specifications were found to be in conflict: - opencv3 -> python 2.7* - python 3.6*

Anaconda安裝opencv3.1報錯：

UnsatisfiableError: The following specifications were found to be in conflict:  - opencv3 -> python 2.7*  - python 3.6*

經過測試知道，Anaconda安裝的Python版本為3.6，而通過conda安裝Opencv3.1使用的Python版本為3.5.

故先使用：

conda install python=3.5
然后使用：
conda install -c menpo opencv3

可正常安裝