refactoring

api/task_api.py

@@ -38,7 +38,11 @@ def get_task(id):
 
 @task_api.route('/task/list', methods=['GET'])
 def list_tasks():
+    ids_param = request.args.get('ids')
     tasks = task_db.all()
+    if ids_param:
+        ids = set(ids_param.split(','))
+        tasks = [task for task in tasks if task.get('id') in ids]
     return jsonify({'tasks': tasks}), 200
 
 @task_api.route('/task/<id>', methods=['DELETE'])