https://indiehackers.com/products has a list of apps that earns money. If you want to skip through those market research work, you can clone some of the profitable apps there, maybe with your own little twist.

If you are willing to do the market research work, pick an audience (say, python developer, since you are one and understand it most), find out whats their problem (maybe setting ENV? maybe setting up a server to deploy to?) , and start from there.