I need huffman code(best in python or in java), which could encode text not by one character (a = 10, b = 11), but by two (ab = 11, ag = 10). Is it possible and if yes, where could i find it, maybe it's somewhere in the internet and i just can'd find it?
There is probably some code somewhere. But this sounds like a parsing and tokenising question. One of the first questions I would be answering is how many unique pairs are you dealing with. Huffman encoding works best with small numbers of tokens. For example, the 101 characters on your keyboard. But if your two characters can be anything, you are now expanding the maximum number of characters massively.
Huffman coding two characters as one