Update voice_create.py

voice_create.py

@@ -21,8 +21,7 @@ def text_to_speech(input_file, selected_option):
             # script列が文字列か確認し、文字列でない場合は空文字に置き換える
             script = row.get('script', '')
             print("原稿",script)
-            if script == "nan":
-                # scriptが空の場合はスキップ
+            if pd.isna(script):
                 continue
             if not isinstance(script, str):
                 script = str(script)