perfect that worked, thanks. Had the 'for' loop in twice.

yeah its a strange one, the docs say minimum python 3.5 but I am using 3.7 so shouldn't be an issue. Will put it to the github then instead. thanks

python 3.7.6, gurobi 9.1.2, mip '1.13.0'

thanks @Stuart Mitchell , it made it slightly faster than CBC (~0.2 seconds worth). Agree it seems you probably only see material time savings for larger problems than mine.

thanks, added above

thanks for the clarification.

thanks. Solution1 is not working for me, getting an error "ImportError: attempted relative import with no known parent package". Sol2 is what i was trying to do. i tried typing the above in the terminal but get an error from the $ character.What should the "my_app" be in this context? the folder where the files are saved?

yes they are in the same path. using import pathlib print(pathlib.Path().resolve()) on the original file the path is "C:\Users\Cian\Desktop\Project" but when I use sys.path the path is C:\\Users\\Cian\\Desktop\\Project. maybe the double '\' throwing it off.