Update app.py

app.py

@@ -45,7 +45,8 @@ def load_lang(langname):
     model_word_separator = '|'
     model_blank_token = '[PAD]'
     lang_aligner = ctcalign.aligner(model_path,model_word_separator,model_blank_token)
-    
+
+    df = df.data.to_pandas()
     df = df.drop(columns=['audio', 'speaker_id','duration'])
     return (df[:10], lang_aligner) #(df, df[:50])