The post provides a comprehensive guide on implementing a Byte Pair Encoding (BPE) tokenizer from scratch for educational purposes. It explains the main idea behind BPE, how to build a vocabulary, and steps for encoding and decoding. Additionally, it includes Python code for the BPE tokenizer, showcasing training, encoding, and decoding processes, and offers insights on saving and loading the tokenizer. The post also demonstrates how to load the original GPT-2 BPE tokenizer from OpenAI.
Table of contents
1.1 Bits and bytes1.2 Building the vocabulary1.3 BPE algorithm outline1.4 BPE algorithm example2. A simple BPE implementation3. BPE implementation walkthroughSort: