How to revert to previous package in Anaconda?

Question

If i do

conda info pandas 

I see all the available packages.

I updated my pandas until this morning, but I need to revert to the previous version. I tried

 conda update pandas 0.13.1 

but it didn’t work. How to specify which version to use?

Answer 1

Instead, I had to use the install function:

 conda install pandas=0.13.1 

Answer 2

In case you want to return a recently installed package that has made several changes depending on it (for example, tenorflow), you can roll back to an earlier installation state using the following method:

 conda list --revisions conda install --revision [revision number] 

The first command displays previous versions of the installation (with dependencies), and the second returns to the revision number you specified.

Note that if you want to (re) install a later version, you may have to reinstall all intermediate versions in sequence. If you were on the 23rd revision, reinstalled revision 20 and want to return, you may have to start each of them:

 conda install --revision 21 conda install --revision 22 conda install --revision 23