1
# Inspired by: https://github.com/hendrycks/test/blob/master/evaluate_flan.py
9
from tqdm import tqdm, trange
10
from typing import Any, Dict, List, Optional
12
from datasets import load_dataset
13
from transformers.utils import cached_file
15
from llmtuner.data.template import get_template_and_fix_tokenizer
16
from llmtuner.eval.template import get_eval_template
17
from llmtuner.extras.constants import CHOICES, SUBJECTS
18
from llmtuner.model import dispatch_model, get_eval_args, load_model_and_tokenizer
23
def __init__(self, args: Optional[Dict[str, Any]] = None) -> None:
24
self.model_args, self.data_args, self.eval_args, finetuning_args = get_eval_args(args)
25
self.model, self.tokenizer = load_model_and_tokenizer(self.model_args, finetuning_args)
26
self.tokenizer.padding_side = "right" # avoid overflow issue in batched inference for llama2
27
self.model = dispatch_model(self.model)
28
self.template = get_template_and_fix_tokenizer(self.data_args.template, self.tokenizer)
29
self.eval_template = get_eval_template(self.eval_args.lang)
30
self.choice_inputs = self._encode_choices()
32
def _encode_choices(self) -> List[int]:
33
if isinstance(getattr(self.tokenizer, "tokenizer", None), tiktoken.Encoding): # for tiktoken tokenizer (Qwen)
34
kwargs = dict(allowed_special="all")
36
kwargs = dict(add_special_tokens=False)
38
return [self.tokenizer.encode(self.eval_template.prefix + ch, **kwargs)[-1] for ch in CHOICES]
40
@torch.inference_mode()
41
def batch_inference(self, batch_input: Dict[str, torch.Tensor]) -> List[str]:
42
logits = self.model(**batch_input).logits
43
lengths = torch.sum(batch_input["attention_mask"], dim=-1)
44
word_probs = torch.stack([logits[i, lengths[i] - 1] for i in range(len(lengths))], dim=0)
45
choice_probs = torch.nn.functional.softmax(word_probs[:, self.choice_inputs], dim=-1).detach()
46
return [chr(ord("A") + offset.item()) for offset in torch.argmax(choice_probs, dim=-1)]
48
def eval(self) -> None:
49
if "token" in inspect.signature(cached_file).parameters:
50
kwargs = {"token": self.model_args.hf_hub_token}
51
elif "use_auth_token" in inspect.signature(cached_file).parameters: # for transformers==4.31.0
52
kwargs = {"use_auth_token": self.model_args.hf_hub_token}
54
mapping = cached_file(
55
path_or_repo_id = os.path.join(self.eval_args.task_dir, self.eval_args.task),
56
filename="mapping.json",
57
cache_dir=self.model_args.cache_dir,
61
with open(mapping, "r", encoding="utf-8") as f:
62
categorys: Dict[str, Dict[str, str]] = json.load(f)
64
category_corrects = {subj: np.array([], dtype="bool") for subj in SUBJECTS}
65
pbar = tqdm(categorys.keys(), desc="Processing subjects", position=0)
68
dataset = load_dataset(
69
path=os.path.join(self.eval_args.task_dir, self.eval_args.task),
71
cache_dir=self.model_args.cache_dir,
72
download_mode=self.eval_args.download_mode,
73
token=self.model_args.hf_hub_token
75
pbar.set_postfix_str(categorys[subject]["name"])
76
inputs, outputs, labels = [], [], []
77
for i in trange(len(dataset[self.data_args.split]), desc="Formatting batches", position=1, leave=False):
78
support_set = dataset["train"].shuffle().select(range(min(self.eval_args.n_shot, len(dataset["train"]))))
79
query, resp, history = self.eval_template.format_example(
80
target_data=dataset[self.data_args.split][i],
81
support_set=support_set,
82
subject_name=categorys[subject]["name"],
83
use_history=self.template.use_history
85
input_ids, _ = self.template.encode_oneturn(
86
tokenizer=self.tokenizer, query=query, resp=resp, history=history
88
inputs.append({"input_ids": input_ids, "attention_mask": [1] * len(input_ids)})
91
for i in trange(0, len(inputs), self.eval_args.batch_size, desc="Predicting batches", position=1, leave=False):
92
batch_input = self.tokenizer.pad(
93
inputs[i : i + self.eval_args.batch_size], return_attention_mask=True, return_tensors="pt"
94
).to(self.model.device)
95
preds = self.batch_inference(batch_input)
98
corrects = (np.array(outputs) == np.array(labels))
99
category_name = categorys[subject]["category"]
100
category_corrects[category_name] = np.concatenate([category_corrects[category_name], corrects], axis=0)
101
category_corrects["Average"] = np.concatenate([category_corrects["Average"], corrects], axis=0)
102
results[subject] = {str(i): outputs[i] for i in range(len(outputs))}
105
self._save_results(category_corrects, results)
107
def _save_results(self, category_corrects: Dict[str, np.ndarray], results: Dict[str, Dict[int, str]]) -> None:
108
score_info = "\n".join([
109
"{:>15}: {:.2f}".format(category_name, 100 * np.mean(category_correct))
110
for category_name, category_correct in category_corrects.items() if len(category_correct)
113
if self.eval_args.save_dir is not None:
114
os.makedirs(self.eval_args.save_dir, exist_ok=False)
115
with open(os.path.join(self.eval_args.save_dir, "results.json"), "w", encoding="utf-8", newline="\n") as f:
116
json.dump(results, f, indent=2)
118
with open(os.path.join(self.eval_args.save_dir, "results.log"), "w", encoding="utf-8", newline="\n") as f:
122
if __name__ == "__main__":
123
evaluator = Evaluator()