using different version of package within python anaconda
anaconda 2 can't install tensorflow 2.x using conda install, I had to re-install anaconda 2, then install tf 2.x using pip install
I see that I have both version of tensorflow in anaconda2/lib/python2.7/site-packages:

tensorflow-1.14.0.dist-info/
tensorflow-2.1.0.dist-info/

But when I start anaconda2/bin/jupyter qtconsole, I always get 1.14. How do I use 2.1?
The history may be something like this:

1.14 comes with conda
I did pip install for 2.1
I tried to do "pip install tensorflow-datasets', it didn't work.
Googling suggested "conda install -c anaconda tensorflow-datasets". It looks this set tensorflow back to 1.14
I tried different ways of 'pip install' 'conda install' 'conda update', but can't get tensorflow to 2.1.

Thanks.