initial program, throws error without civitai info

src/program.py

@@ -0,0 +1,68 @@
+import glob
+import io
+import json
+import os
+from os import path
+from datetime import datetime
+
+import PySimpleGUI as sg
+from PIL import Image
+
+
+def get_civitai_text(civitai_path: str) -> str:
+    with open(civitai_path, "r") as f:
+        civitai_json = json.load(f)
+    created_at: datetime = datetime.fromisoformat(civitai_json["createdAt"])
+    return f"""Model Name: {civitai_json["model"]["name"]}
+Checkpoint Name: {civitai_json["name"]}
+Created at: {created_at}"""
+
+
+def get_extra_filenames(model_path: str):
+    base, ext = os.path.splitext(model_path)
+    preview_image: str = base + ".preview.png"
+    civitai_info: str = base + ".civitai.info"
+    return preview_image if path.exists(preview_image) else None, civitai_info if path.exists(civitai_info) else None
+
+
+def get_models_from_folder(model_folder: str):
+    return glob.glob(path.join(model_folder, "**/*.safetensors"), recursive=True) + glob.glob(
+        path.join(model_folder, "**/*.ckpt"), recursive=True)
+
+
+layout = [
+    [sg.Text("Enter a folder:")],
+    [sg.InputText(key="model_folder", enable_events=True), sg.FolderBrowse()],
+    [sg.Combo(key="main_folder", enable_events=True, values=[], size=60),
+     sg.Combo(key="models", enable_events=True, values=[], size=60)],
+    [sg.Image(key="preview_image", enable_events=True)],
+    [sg.Text(key="civitai_info", enable_events=True)],
+]
+window = sg.Window("Model Folder", layout)
+while True:
+    event, values = window.read()
+    print(event)
+    if event == sg.WIN_CLOSED or event == "Cancel":
+        break
+    if event == "model_folder":
+        model_folder = values["model_folder"]
+        if model_folder:
+            list_subfolders_with_paths = [f.path for f in os.scandir(model_folder) if f.is_dir()]
+            if list_subfolders_with_paths:
+                window["main_folder"].update(values=list_subfolders_with_paths)
+    if event == "main_folder":
+        model_subfolder = values["main_folder"]
+        models = get_models_from_folder(model_subfolder)
+        if model_subfolder and models:
+            window["models"].update(values=models)
+    if event == "models":
+        model_path = values["models"]
+        preview_image, civitai_info = get_extra_filenames(model_path)
+        img = Image.open(preview_image)
+        img.thumbnail((512, 512))
+        bio = io.BytesIO()
+        img.save(bio, format="PNG")
+        window["preview_image"].update(data=bio.getvalue())
+        window["civitai_info"].update(get_civitai_text(civitai_info))
+
+window.close()