Unfortunately I think I cannot help you at this point. Solving this problem remotely exceeds my capabilities since I am the only user on my MacBook. I cannot replicate "your" environment and test the same thing you have to do to get things running. Try using google to solve this problem.
I think it has something to do with the different users on the MacBook... an finally... a proper path – again 
Try google the warning which is shown in your screenshot.
yep it works. A new file is created (which is shown in the bottom line). now you could paste the python script, safe the file and exit nano but I think we can skip this since you are using Atom for creating the python script. Atom and nano is kind of the same thing. Both are text editors which we want to use to create the python script.
Again, our pain in the neck... the path/ directory you are in. The path you are currently working in (with the terminal) is shown in the line:
samhumphreys@Ruths-MacBook-Pro FOLDER_YOUR_ARE_WORKING_IN %
If you take a look at your screenshot the ~ means that you are in your users home directory.
if you run python script.py the terminal tries to run the script you named (script.py) in the current directory you are in, but the script is in your "BTT Preset" folder.
So you have two possibilities: you can do the run-terminal-at-folder-thing again or you can define the hole path to you script.
python "/Users/samhumphreys/Library/Mobile Documents/com~apple~CloudDocs/2020/BTT Presets/spotifywidgetcode.py"
mind the double quotes!