[Python] Extract bordering countries from image using Python [closed]

I want to code a risk like game using drawn maps which look like this

I need to extract all countries and their neighboring countries in order to know what countries the user can attack.

So far I have not been able to figure out how to do so.

I did not find anything related to the topic on the internet and using collision boxes or checking if the borders overlap did not work. Also due to the fact that I have not found a good way to extract the countries and their borders.

One way would be (if one would somehow be able to extract the borders for every country in a good way) to check whether two countries have the same border, because if they do they are neighboring. like this.

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