diff --git a/tools/diffusion/gradio_ui.py b/tools/diffusion/gradio_ui.py
index 283383a4..895f74c6 100644
--- a/tools/diffusion/gradio_ui.py
+++ b/tools/diffusion/gradio_ui.py
@@ -55,9 +55,11 @@ def launch_gradio(
                     speaker = gr.Dropdown(
                         label="Speaker Name (Used for Multi-Speaker Models)",
                         choices=list(speaker_mapping.keys()),
-                        value=speaker
-                        if speaker in speaker_mapping
-                        else list(speaker_mapping.keys())[0],
+                        value=(
+                            speaker
+                            if speaker in speaker_mapping
+                            else list(speaker_mapping.keys())[0]
+                        ),
                     )
                 else:
                     speaker = gr.Number(
diff --git a/tools/mfa/postprocess_mfa.py b/tools/mfa/postprocess_mfa.py
index 2973b81b..87a7c8bc 100644
--- a/tools/mfa/postprocess_mfa.py
+++ b/tools/mfa/postprocess_mfa.py
@@ -4,7 +4,6 @@
 It aims to reduce errors for long utterances and detcect aspiration which is not detected by MFA.
 """
 
-
 import librosa
 import numpy as np
 import parselmouth as pm