remove old tokenizer
Browse files- claude_tokenizer.py +0 -112
claude_tokenizer.py
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import re
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import json
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from typing import List, Dict
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class ClaudeTokenizer:
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def __init__(self, config_file: str, algorithm: str = "trie"):
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with open(config_file, "r") as f:
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config = json.load(f)
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self.vocab = config["vocab"]
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self.vocab_size = config["n_vocab_size"]
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self.pat_str = config["pat_str"]
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self.special_tokens = config["special_tokens"]
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self.token_to_id = {token: i for i, token in enumerate(self.vocab)}
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self.id_to_token = {i: token for token, i in self.token_to_id.items()}
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for token, id in self.special_tokens.items():
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self.token_to_id[token] = id
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self.id_to_token[id] = token
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self.pat = re.compile(self.pat_str)
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self.vocab_trie = self._build_trie(self.vocab)
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self.algorithm = algorithm
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if algorithm not in ["trie", "linear"]:
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raise ValueError("Invalid algorithm. Choose 'trie' or 'linear'.")
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def _build_trie(self, vocab: List[str]) -> Dict:
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trie = {}
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for token in vocab:
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current = trie
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for char in token:
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if isinstance(current, str):
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break
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if char not in current:
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current[char] = {}
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current = current[char]
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if isinstance(current, dict):
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current["*"] = token
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return trie
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def tokenize(self, text: str) -> List[str]:
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if self.algorithm == "trie":
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tokens = []
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for part in self.pat.findall(text):
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tokens.extend(self._tokenize_part_trie(part))
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return tokens
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else:
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return self._tokenize_part_linear(text)
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def encode(self, text: str) -> List[int]:
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tokens = self.tokenize(text)
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return [
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self.token_to_id.get(token, self.special_tokens["<META>"])
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for token in tokens
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]
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def decode(self, ids: List[int]) -> str:
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return "".join(self.id_to_token.get(id, "") for id in ids)
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def _tokenize_part_trie(self, text: str) -> List[str]:
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tokens = []
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while text:
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current = self.vocab_trie
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longest_match = ""
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for i, char in enumerate(text):
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if char not in current:
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break
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current = current[char]
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if "*" in current:
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longest_match = current["*"]
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if longest_match:
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tokens.append(longest_match)
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text = text[len(longest_match):]
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else:
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tokens.append(text[0])
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text = text[1:]
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return tokens
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def _tokenize_part_linear(self, text: str) -> List[str]:
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tokens = []
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while text:
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longest_match = ""
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for token in self.vocab:
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if text.startswith(token) and len(token) > len(longest_match):
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longest_match = token
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if longest_match:
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tokens.append(longest_match)
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text = text[len(longest_match):]
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else:
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tokens.append(text[0])
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text = text[1:]
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return tokens
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# Usage example
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if __name__ == "__main__":
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# Choose the algorithm: "trie" or "linear"
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algorithm = "linear" # or "trie"
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tokenizer = ClaudeTokenizer("tokenizer_config.json", algorithm=algorithm)
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test_text = """Hello! It's nice to meet you. How can I assist you today? I'm here to help with any questions you might have or tasks you need help with."""
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tokens = tokenizer.tokenize(test_text)
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print(f"Tokens ({algorithm}):", tokens)
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encoded = tokenizer.encode(test_text)
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print(f"Encoded ({algorithm}):", encoded)
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decoded = tokenizer.decode(encoded)
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print(f"Decoded ({algorithm}):", decoded)
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