svu | Semantic Version Util | Parser library

I am creating a huffman class that can encode and decode text but I am having trouble with my decode method. My encoding method works fine and my decoding method works for smaller amounts of text. But when I try to decode large amounts of text I get a maximum recursion depth error and am not sure how to fix it. The class takes in a dictionary with characters and their frequencies and then turns them into nodes and builds the tree. After building the tree it puts the characters and their bitcode into another dictionary to be used for encoding and decoding.