Update app.py

app.py

@@ -50,7 +50,6 @@ def read_docx(file):
 
 @st.cache_resource(show_spinner=False)
 def load_data(uploaded_files):
-    # Create the LLM instance outside the cache
     llm = OpenAI(model="gpt-3.5-turbo", temperature=0.5,
                  system_prompt="You are an expert on the Streamlit Python library and your job is to answer technical questions. Assume that all questions are related to the Streamlit Python library. Keep your answers technical and based on facts – do not hallucinate features.")
     
@@ -84,9 +83,17 @@ def save_conversation():
 def load_conversations():
     if os.path.exists("conversations.json"):
         with open("conversations.json", "r") as f:
-            conversations = [json.loads(line) for line in f]
+            conversations = []
+            for line in f:
+                try:
+                    conversation = json.loads(line)
+                    conversations.append(conversation)
+                except json.JSONDecodeError:
+                    st.error("Error decoding JSON from conversations file. Please check the file.")
+                    continue
+            
             # Filter conversations based on the current username
-            return [conv for conv in conversations if conv["username"] == st.session_state.username]
+            return [conv for conv in conversations if isinstance(conv, dict) and "username" in conv and conv["username"] == st.session_state.username]
     return []
 
 # Function to delete selected conversations
@@ -175,4 +182,4 @@ if st.session_state.show_conversations:
     else:
         st.sidebar.write("No previous conversations found.")
 else:
-    st.sidebar.write("Previous conversations are hidden. Click 'Toggle Previous Conversations' to show.")
+    st.sidebar.write("Previous conversations are hidden. Click 'Toggle Previous Conversations' to show.")