Fix return value when no slide is found

app.py

@@ -2,7 +2,6 @@ import glob
 import os
 from pathlib import Path
 
-import pandas as pd
 from flask import Flask, render_template, request, redirect, send_file, jsonify, flash
 from werkzeug.utils import secure_filename
 
@@ -55,22 +54,21 @@ def upload():
 
 @app.route("/search", methods=['POST'])
 def query():
-    try:
     index = Index(index_dir=INDEX_DIR)
     query = request.form.get("term")
     context = request.form.get("context")
     amount = int(request.form.get("amount"))
     results = index.search(query, context)[:amount]
+    if len(results) == 0:
+        return jsonify({
+            "type": "miss"
+        })
     full_path = lambda res: os.getenv('EXTERNAL_HOST', '<PLEASE_SET_EXTERNAL_HOST_ENV_VAR>') + \
                             "/slide/" + res["file_name"] + "_" + str(res["page"]) + ".jpg"
     return jsonify({
         "type": "image",
         "paths": [{"path": full_path(res), "url": full_path(res)} for res in results]
     })
-    except IndexError:
-        return jsonify({
-            "type": "miss"
-        })
 
 
 @app.route("/reset_index", methods=['POST'])