tackle directory bug

app.py

@@ -1,4 +1,5 @@
 import json
+import os
 import gradio as gr
 from textblob import TextBlob
 from snownlp import SnowNLP
@@ -67,7 +68,9 @@ def batch_sentiment_analysis(file_path: str) -> str:
         analysis_result = json.loads( sentiment_analysis(key) )
         data[key] = analysis_result
     
-    output_path = f'processed_{file_path}'
+    dir_name = os.path.dirname(file_path)
+    base_name = os.path.basename(file_path)
+    output_path = os.path.join(dir_name, f'processed_{base_name}')
     with open(output_path, 'w', encoding = 'utf-8') as f:
         json.dump(data, f, ensure_ascii = False, indent = 2)
     
@@ -91,7 +94,9 @@ def batch_chinese_sentiment_analysis(file_path: str) -> str:
         analysis_result = json.loads( chinese_sentiment_analysis(key) )
         data[key] = analysis_result
     
-    output_path = f'processed_{file_path}'
+    dir_name = os.path.dirname(file_path)
+    base_name = os.path.basename(file_path)
+    output_path = os.path.join(dir_name, f'processed_{base_name}')
     with open(output_path, 'w', encoding = 'utf-8') as f:
         json.dump(data, f, ensure_ascii = False, indent = 2)