Hello @deficiant_codge , 

I think it's not possible to modify the python version from a cluster manually without touching the DBR. 
Indeed each version of DBR is coming with a specific version of Python, Spark and Scala. (You can see for each runtime the information about the versions (spark, new features...)  : https://learn.microsoft.com/en-us/azure/databricks/release-notes/runtime/releases ). 

Only way to switch of version is too switch of Runtime.