Use single answer file and model list

Since phased training is using individual model names for judgment, it's hitting the case where multiple models are being loaded for evaluation.  We don't currently need that code path as it was inherited from FastChat so this change removes it and relies on the single answerfile and its model type.

Signed-off-by: Dan McPherson <dmcphers@redhat.com>

Author: Dan McPherson

src/instructlab/eval/mt_bench_common.py

@@ -7,7 +7,6 @@
 from typing import Optional
 import ast
 import dataclasses
-import glob
 import json
 import os
 import re
@@ -84,32 +83,44 @@ def load_questions(question_file: str, begin: Optional[int], end: Optional[int])
     return questions
 
 
-def load_model_answers(answer_dir: str, model_name=None) -> dict:
+def load_model_answers(answer_dir: str, model_name=None, answer_file=None) -> dict:
     """Load model answers.
 
     The return value is a python dict of type:
     Dict[model_name: str -> Dict[question_id: int -> answer: dict]]
     """
     logger.debug(locals())
     model_answers = {}
-    for root, _, files in os.walk(answer_dir):
-        for filename in files:
-            if filename.endswith(".jsonl"):
-                # Removing ".jsonl"
-                file_model_name = filename[:-6]
-                answer = {}
-                file_path = os.path.join(root, filename)
-                with open(file_path, encoding="utf-8") as fin:
-                    for line in fin:
-                        l = json.loads(line)
-                        answer[l["question_id"]] = l
-                model_answers[model_name or file_model_name] = answer
-                if model_name == file_model_name:
-                    logger.debug("Found answer file matching: %s", model_name)
-                    break
+    if answer_file is not None:
+        filename = os.path.basename(answer_file)
+        # Removing ".jsonl"
+        file_model_name = filename[:-6]
+        model_answers[file_model_name] = _load_answers(answer_file)
+    else:
+        for root, _, files in os.walk(answer_dir):
+            for filename in files:
+                if filename.endswith(".jsonl"):
+                    # Removing ".jsonl"
+                    file_model_name = filename[:-6]
+                    file_path = os.path.join(root, filename)
+                    model_answers[model_name or file_model_name] = _load_answers(
+                        file_path
+                    )
+                    if model_name == file_model_name:
+                        logger.debug("Found answer file matching: %s", model_name)
+                        break
     return model_answers
 
 
+def _load_answers(answer_file):
+    answers = {}
+    with open(answer_file, encoding="utf-8") as fin:
+        for line in fin:
+            l = json.loads(line)
+            answers[l["question_id"]] = l
+    return answers
+
+
 def load_judge_prompts(prompt_file: str) -> dict:
     """Load judge prompts.
 
@@ -304,8 +315,6 @@ def check_data(questions, model_answers, ref_answers, models, judges):
             ), f"Missing reference answer to Question {q['question_id']} for judge {jg.model_name}"
 
 
-def get_model_list(answer_dir):
+def get_model_list(answer_file):
     logger.debug(locals())
-    file_paths = glob.glob(f"{answer_dir}/*.jsonl")
-    file_names = [os.path.splitext(os.path.basename(f))[0] for f in file_paths]
-    return file_names
+    return [os.path.splitext(os.path.basename(answer_file))[0]]

src/instructlab/eval/mt_bench_judgment.py

@@ -155,7 +155,6 @@ def judge_model(
     bench_name="mt_bench",
     output_dir="eval_output",
     data_dir=None,
-    model_list=None,
     max_workers=1,
     first_n=None,
     merge_system_user_message=False,
@@ -180,7 +179,7 @@ def judge_model(
     questions = load_questions(question_file, None, None)
 
     # Load answers
-    model_answers = load_model_answers(answer_dir)
+    model_answers = load_model_answers(answer_dir, answer_file=answer_file)
     ref_answers = load_model_answers(ref_answer_dir, judge_model_name)
 
     # Load judge
@@ -189,10 +188,7 @@ def judge_model(
     if first_n:
         questions = questions[:first_n]
 
-    if model_list is None:
-        models = get_model_list(answer_dir)
-    else:
-        models = model_list
+    models = get_model_list(answer_file)
 
     judges = make_judge_single(judge_model_name, judge_prompts)
     output_file = f"{output_base_dir}/model_judgment/{judge_model_name}_single.jsonl"
@@ -280,7 +276,6 @@ def generate_judgment(
     output_dir="eval_output",
     data_dir=None,
     branch=None,
-    model_list=None,
     max_workers=1,
     first_n=None,
     merge_system_user_message=False,
@@ -302,7 +297,6 @@ def generate_judgment(
         output_dir=output_dir,
         data_dir=data_dir,
         branch=branch,
-        model_list=model_list,
         max_workers=max_workers,
         first_n=first_n,
         merge_system_user_message=merge_system_user_message,