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<!--Copyright 2023 The HuggingFace Team. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
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*이 모델은 2023년 8월 24일에 공개되었으며, 2023년 8월 25일에 Hugging Face Transformers에 추가되었습니다.*
<div style="float: right;">
<div class="flex flex-wrap space-x-1">
<img alt="PyTorch" src="https://img.shields.io/badge/PyTorch-DE3412?style=flat&logo=pytorch&logoColor=white">
">
</div>
</div>
# CodeLlama[[codellama]]
[Code Llama](https://huggingface.co/papers/2308.12950)는 코딩 작업에 특화된 대규모 언어 모델 계열로, [Llama 2](./llama2)를 기반으로 개발되었습니다. 일반적인 코드, Python 특화, 명령어(지시) 기반 변형 등 다양한 버전으로 제공되며, 모두 7B, 13B, 34B, 70B 매개변수 크기로 사용할 수 있습니다. Code Llama 모델은 코드를 생성하고 설명하며, 코드의 누락된 부분을 채울 수도 있습니다. 이를 인필링(infilling)이라고 합니다. 16K 토큰 길이로 훈련되었지만, 최대 100K 토큰까지 안정적으로 생성하며 긴 컨텍스트도 처리할 수 있습니다.
[Code Llama](https://huggingface.co/collections/meta-llama/code-llama-family-661da32d0a9d678b6f55b933) 컬렉션에서 모든 원본 Code Llama 체크포인트를 찾을 수 있습니다.
> [!TIP]
> 다양한 코딩 작업에 Code Llama를 적용하는 더 많은 예시를 보려면 오른쪽 사이드바의 Code Llama 모델을 클릭하세요.
아래 예시는 [`Pipeline`], [`AutoModel`], 그리고 명령줄에서 코드를 생성하는 방법을 보여줍니다.
<hfoptions id="usage">
<hfoption id="Pipeline">
```py
import torch
from transformers import pipeline
pipe = pipeline(
"text-generation",
model="meta-llama/CodeLlama-7b-hf",
torch_dtype=torch.float16,
device_map=0
)
# 기본 코드 생성
result = pipe("# Function to calculate the factorial of a number\ndef factorial(n):", max_new_tokens=256)
print(result[0]['generated_text'])
# 인필링
infill_result = pipe("def remove_non_ascii(s: str) -> str:\n \"\"\" <FILL_ME>\n return result", max_new_tokens=200)
print(infill_result[0]['generated_text'])
```
</hfoption>
<hfoption id="AutoModel">
```py
import torch
from transformers import AutoModelForCausalLM, AutoTokenizer
tokenizer = AutoTokenizer.from_pretrained("meta-llama/CodeLlama-7b-hf")
model = AutoModelForCausalLM.from_pretrained(
"meta-llama/CodeLlama-7b-hf",
torch_dtype=torch.float16,
device_map="auto",
attn_implementation="sdpa"
)
# 기본 코드 생성
prompt = "# Function to calculate the factorial of a number\ndef factorial(n):"
input_ids = tokenizer(prompt, return_tensors="pt").to("cuda")
output = model.generate(
**input_ids,
max_new_tokens=256,
cache_implementation="static"
)
print(tokenizer.decode(output[0], skip_special_tokens=True))
# 인필링
infill_prompt = "def remove_non_ascii(s: str) -> str:\n \"\"\" <FILL_ME>\n return result"
input_ids = tokenizer(infill_prompt, return_tensors="pt").to(model.device)
filled_output = model.generate(**input_ids, max_new_tokens=200)
filled_text = tokenizer.decode(filled_output[0], skip_special_tokens=True)
print(filled_text)
```
</hfoption>
</hfoptions>
양자화는 가중치를 더 낮은 정밀도로 표현하여 대규모 모델의 메모리 부담을 줄입니다. 더 많은 사용 가능한 양자화 백엔드는 [양자화](../quantization/overview) 개요를 참조하세요.
아래 예시는 [bitsandbytes](../quantization/bitsandbytes)를 사용하여 가중치를 4비트로만 양자화합니다.
```py
# bitsandbytes를 설치합니다.
import torch
from transformers import AutoModelForCausalLM, CodeLlamaTokenizer, BitsAndBytesConfig
bnb_config = BitsAndBytesConfig(load_in_4bit=True, bnb_4bit_compute_dtype=torch.bfloat16, bnb_4bit_quant_type="nf4", bnb_4bit_use_double_quant=True)
tokenizer = CodeLlamaTokenizer.from_pretrained("meta-llama/CodeLlama-34b-hf")
model = AutoModelForCausalLM.from_pretrained(
"meta-llama/CodeLlama-34b-hf",
torch_dtype=torch.bfloat16,
device_map="auto",
quantization_config=bnb_config
)
prompt = "# Write a Python function to check if a string is a palindrome\ndef is_palindrome(s):"
input_ids = tokenizer(prompt, return_tensors="pt").to("cuda")
output = model.generate(**input_ids, max_new_tokens=200, cache_implementation="static")
print(tokenizer.decode(output[0], skip_special_tokens=True))
```
[AttentionMaskVisualizer](https://github.com/huggingface/transformers/blob/beb9b5b02246b9b7ee81ddf938f93f44cfeaad19/src/transformers/utils/attention_visualizer.py#L139)를 사용하면 모델이 어떤 토큰에 주의를 기울일 수 있고 기울일 수 없는지를 더 잘 이해할 수 있습니다.
```py
from transformers.utils.attention_visualizer import AttentionMaskVisualizer
visualizer = AttentionMaskVisualizer("meta-llama/CodeLlama-7b-hf")
visualizer("""def func(a, b):
return a + b""")
```
<div class="flex justify-center">
<img src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/model_doc/codellama-attn-mask.png"/>
</div>
## 참고사항[[notes]]
- 인필링 기능은 7B 및 13B 기반 모델에서만 사용할 수 있으며, Python, Instruct, 34B 또는 70B 모델에서는 사용할 수 없습니다.
- 코드를 채워 넣고 싶은 부분에 `<FILL_ME>` 토큰을 사용하세요. 토크나이저는 이 토큰을 분할하여 [원본 훈련 패턴](https://github.com/facebookresearch/codellama/blob/cb51c14ec761370ba2e2bc351374a79265d0465e/llama/generation.py#L402) 을 따르는 입력 문자열로 변환합니다. 이는 직접 패턴을 준비하는 것보다 더 안정적입니다.
```py
from transformers import LlamaForCausalLM, CodeLlamaTokenizer
tokenizer = CodeLlamaTokenizer.from_pretrained("meta-llama/CodeLlama-7b-hf")
model = LlamaForCausalLM.from_pretrained("meta-llama/CodeLlama-7b-hf")
PROMPT = '''def remove_non_ascii(s: str) -> str:
""" <FILL_ME>
return result
'''
input_ids = tokenizer(PROMPT, return_tensors="pt")["input_ids"]
generated_ids = model.generate(input_ids, max_new_tokens=128)
filling = tokenizer.batch_decode(generated_ids[:, input_ids.shape[1]:], skip_special_tokens = True)[0]
print(PROMPT.replace("<FILL_ME>", filling))
```
- 추가 훈련이나 미세 조정에는 `bfloat16`을 사용하고 추론에는 `float16`을 사용하세요.
- `BOS` 문자는 접두사나 접미사를 인코딩할 때 인필링 작업에 사용되지 않으며, 각 프롬프트의 맨 앞에서만 사용됩니다.
- 토크나이저는 [SentencePiece](https://github.com/google/sentencepiece)를 기반으로 하는 byte-pair 인코딩 모델입니다. 디코딩 과정에서 첫 번째 토큰이 단어의 시작인 경우(예를 들어 "Banana"), 토크나이저는 문자열에 접두사 공백을 추가하지 않습니다.
## CodeLlamaTokenizer
[[autodoc]] CodeLlamaTokenizer
- get_special_tokens_mask
- save_vocabulary
## CodeLlamaTokenizerFast
[[autodoc]] CodeLlamaTokenizerFast
- get_special_tokens_mask
- update_post_processor
- save_vocabulary