Dynamic localization of digits from a number from images in Python

Question

I am working on a dynamic digit localization problem from a number in images in Python. What I exactly mean is: if I have an image like this:

I want to separate all the digits like, 8, 0, 1 like this:

I have tried and explored with MSER, but did not get any far with. And the main problem is, the number can have any number of digits. Another example can be:

And the number should be separated as 2, 2 like this:

Is there any other approach that I can take using open cv or any other packages available in Python?