fix mkdir

app.py

@@ -22,7 +22,7 @@ def clean_cache(cache_dir=CACHE_DIR):
     if os.path.exists(cache_dir):
         shutil.rmtree(cache_dir)
 
-    os.mkdir(cache_dir)
+    os.makedirs(cache_dir, exist_ok=True)
 
 
 def get_audio_file_type(file_path):
@@ -130,7 +130,10 @@ with gr.Blocks() as iface:
     with gr.Tab("Upload mode"):
         gr.Interface(
             fn=inference,
-            inputs=gr.Audio(label="Please upload 100% of the audio before clicking submit", type="filepath"),
+            inputs=gr.Audio(
+                label="Please upload 100% of the audio before clicking submit",
+                type="filepath",
+            ),
             outputs=[
                 gr.components.File(label="Download MIDI"),
                 gr.components.File(label="Download PDF score"),