Changing your Python version with Anaconda | downgrade/upgrade python version on conda

First, make sure you have the latest version of conda by running

conda update conda

Then run

conda install python=3.5.0 # or maybe  conda install python=2.7.8 # or whatever you want....

This will attempt to update all your packages in your root environment to Python 3 versions. If it is not possible (e.g., because some package is not built for Python 3.5), it will give you an error message indicating which package(s) caused the issue.

If you installed packages with pip, you’ll have to reinstall them.