I have read conflicting accounts on whether explicit imports were required for read only usage. On all accounts the imports are required for any mutations to globals.
Specifically I am annoyed by needing to put global ... inside every method within a single script for such things as Enums that are always invariant.  I'd like a program-level setting to just allow read-only usage of _globals.  
What are the options here?
Update  I see what is happening: the Pycharm is actually only flagging these when there is a mutation happening. It was hard to discover because often enough the first usages of the global variable were read-only : but only further down in a given method were the mutations happening. In the case shown in the screenshot it is the lastBadgeId:
If the mutations in subsequent code in that same method are commented out then the red goes away.

 
    