Fix all lint errors (#2627)

evaluation/evals.py

@@ -1,11 +1,12 @@
-import json
 import argparse
-from metrics.utils import calculate_metrics, calculate_bleu_scores
-from metrics.llm_judge import evaluate_llm_judge
-from collections import defaultdict
-from tqdm import tqdm
 import concurrent.futures
+import json
 import threading
+from collections import defaultdict
+
+from metrics.llm_judge import evaluate_llm_judge
+from metrics.utils import calculate_bleu_scores, calculate_metrics
+from tqdm import tqdm
 
 
 def process_item(item_data):