fix: resolve ruff linting issues and improve code formatting

app/main.py

@@ -6,7 +6,6 @@ import io
 import boto3
 import zipfile
 import tempfile
-import importlib.util
 from botocore.exceptions import ClientError
 from typing import List
 from fastapi import FastAPI, Request, Form
@@ -20,12 +19,14 @@ import logging
 # Import the functions from gen_op.py
 from app.gen_op import generer_pdf_exercices_en_memoire
 
+
 # Custom filter to exclude health check logs
 class HealthCheckFilter(logging.Filter):
     def filter(self, record: logging.LogRecord) -> bool:
         # Exclude health check requests from logs
         return "GET /health " not in record.getMessage()
 
+
 # Apply the filter to Uvicorn's access logger
 logging.getLogger("uvicorn.access").addFilter(HealthCheckFilter())
 
@@ -167,6 +168,7 @@ class ExerciseRequest(BaseModel):
     max_table: int
     num_exercises: int = 15
 
+
 class OperationExerciseRequest(BaseModel):
     num_exercises: int = 20
 
@@ -315,20 +317,22 @@ def create_math_exercises_pdf(
 def create_operation_exercises_pdf(num_exercises: int = 20) -> str:
     """Crée un fichier PDF avec des exercices d'opérations et l'upload sur S3"""
     import datetime
-    
+
     # Add timestamp to filename
     timestamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
     pdf_filename = f"exercices_operations_{num_exercises}_exercices_{timestamp}.pdf"
-    
+
     # Generate PDF in memory using gen-op functions
     pdf_data = generer_pdf_exercices_en_memoire(num_exercises)
-    
+
     # Upload to S3
-    upload_success = upload_to_s3(pdf_data, S3_BUCKET_NAME, pdf_filename, "application/pdf")
-    
+    upload_success = upload_to_s3(
+        pdf_data, S3_BUCKET_NAME, pdf_filename, "application/pdf"
+    )
+
     if not upload_success:
         raise Exception("Failed to upload PDF to S3")
-    
+
     return pdf_filename
 
 
@@ -479,7 +483,7 @@ async def bulk_download(filenames: str = Form(...)):
     try:
         # Parse the JSON string to get the list of filenames
         filename_list = json.loads(filenames)
-        
+
         # Create a temporary zip file
         with tempfile.NamedTemporaryFile(suffix=".zip", delete=False) as tmp_zip:
             with zipfile.ZipFile(tmp_zip.name, "w") as zipf:
@@ -487,16 +491,16 @@ async def bulk_download(filenames: str = Form(...)):
                     file_data = download_from_s3(S3_BUCKET_NAME, filename)
                     if file_data:
                         zipf.writestr(filename, file_data)
-            
+
             # Read the zip file
             with open(tmp_zip.name, "rb") as f:
                 zip_data = f.read()
-            
+
             # Clean up temporary file
             import os
-            
+
             os.unlink(tmp_zip.name)
-            
+
             # Return streaming response with zip data
             zip_filename = f"math_exercises_{len(filename_list)}_files.zip"
             return StreamingResponse(
@@ -518,5 +522,5 @@ async def health_check():
 
 if __name__ == "__main__":
     import uvicorn
-    
+
     uvicorn.run(app, host="0.0.0.0", port=8000)