remove todo, fix bug if no audio file was present

app.py

@@ -127,10 +127,13 @@ def split_wav_file(audiofileuploader, mindur2, maxdur2, name_for_split_files2):
     return f"File split successfully!\nCheck below for zipped files.\nAmount created: {len(audio_files)}", zip_file_name2
 
 def get_average_pitch(audio_file):
-    y, sr = librosa.load(audio_file, sr=None)
-    pitches, magnitudes = librosa.piptrack(y=y, sr=sr)
-    mean_pitch = pitches.mean()
-    return f"Average pitch: {mean_pitch:.2f} Hz"
+    if audio_file == None:
+        raise gr.Error("Audio file cannot be empty!")
+    else:
+        y, sr = librosa.load(audio_file, sr=None)
+        pitches, magnitudes = librosa.piptrack(y=y, sr=sr)
+        mean_pitch = pitches.mean()
+        return f"Average pitch: {mean_pitch:.2f} Hz"
 
 with gr.Blocks(theme='NoCrypt/miku', title="Global Dataset Maker") as app:
     gr.HTML(
@@ -198,8 +201,7 @@ with gr.Blocks(theme='NoCrypt/miku', title="Global Dataset Maker") as app:
                         )
             with gr.Tab("Pitch analyzer"):
                 gr.Markdown("Upload a wav file here, and this will determine the average pitch.")
-                gr.HTML("<h1> Zip files are not supported as of now.")
-                gr.HTML("<h1> TODO: Add error message if no audio file is provided. </h1>")
+                gr.HTML("<h1> Zip files and MP3 files are not supported as of now.")
                 with gr.Row():
                     with gr.Column(variant='compact'):
                             with gr.Row():