How to fix the Anaconda linter showing errors for f-strings in Sublime Text 3?
Edit your users preferences of Anaconda and add this:
"python_interpreter": "python3",
I have read somewhere that it was a known bug of python. It's fixed in version 3.6.3, so maybe you have to update your python version also. Mine was 3.6.3, so I don't know if it's necessary to update.