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transformers and we advise you to use the latest version of transformers.transformers<4.37.0, you will encounter the following error:KeyError: 'qwen2'apply_chat_template to show you how to load the tokenizer and model and how to generate contents.1from transformers import AutoModelForCausalLM, AutoTokenizer
2
3model_name = "Qwen/Qwen2.5-Coder-7B-Instruct"
4
5model = AutoModelForCausalLM.from_pretrained(
6 model_name,
7 torch_dtype="auto",
8 device_map="auto"
9)
10tokenizer = AutoTokenizer.from_pretrained(model_name)
11
12prompt = "write a quick sort algorithm."
13messages = [
14 {"role": "system", "content": "You are Qwen, created by Alibaba Cloud. You are a helpful assistant."},
15 {"role": "user", "content": prompt}
16]
17text = tokenizer.apply_chat_template(
18 messages,
19 tokenize=False,
20 add_generation_prompt=True
21)
22model_inputs = tokenizer([text], return_tensors="pt").to(model.device)
23
24generated_ids = model.generate(
25 **model_inputs,
26 max_new_tokens=512
27)
28generated_ids = [
29 output_ids[len(input_ids):] for input_ids, output_ids in zip(model_inputs.input_ids, generated_ids)
30]
31
32response = tokenizer.batch_decode(generated_ids, skip_special_tokens=True)[0]config.json is set for context length up to 32,768 tokens.
To handle extensive inputs exceeding 32,768 tokens, we utilize YaRN, a technique for enhancing model length extrapolation, ensuring optimal performance on lengthy texts.config.json to enable YaRN:1{
2 ...,
3 "rope_scaling": {
4 "factor": 4.0,
5 "original_max_position_embeddings": 32768,
6 "type": "yarn"
7 }
8}