I have installed installed the following modules in my EC2 server which already has python (3.6) & anaconda installed :
Unfortunately, there are multiple things in python-land called "snappy". I believe you may have the wrong one, in which case one of the following conda commands should solve this for you:
conda install python-snappy
or
conda install python-snappy -c conda-forge
where the latter is slightly more recent (releases the GIL which can be important in threaded applications).