Update app.py

app.py

@@ -26,13 +26,31 @@ with st.sidebar:
     add_vertical_space(5)
     st.write('Made with ❤️ by EinfachAlex')
 
-# Generate empty lists for generated and past.
-## generated stores AI generated responses
-if 'generated' not in st.session_state:
-    st.session_state['generated'] = ["Hallo, wie kann ich dir helfen ?"]
-## past stores User's questions
-if 'past' not in st.session_state:
-    st.session_state['past'] = ['Hi!']
+2023-05-18 21:30:13.025 
+  Warning: to view this Streamlit app on a browser, run it with the following
+  command:
+
+    streamlit run app.py [ARGUMENTS]
+2023-05-18 21:30:13.026 Session state does not function when running a script without `streamlit run`
+Traceback (most recent call last):
+  File "/home/user/.local/lib/python3.8/site-packages/streamlit/runtime/state/session_state.py", line 376, in __getitem__
+    return self._getitem(widget_id, key)
+  File "/home/user/.local/lib/python3.8/site-packages/streamlit/runtime/state/session_state.py", line 421, in _getitem
+    raise KeyError
+KeyError
+
+During handling of the above exception, another exception occurred:
+
+Traceback (most recent call last):
+  File "app.py", line 68, in <module>
+    if st.session_state['generated']:
+  File "/home/user/.local/lib/python3.8/site-packages/streamlit/runtime/state/session_state_proxy.py", line 90, in __getitem__
+    return get_session_state()[key]
+  File "/home/user/.local/lib/python3.8/site-packages/streamlit/runtime/state/safe_session_state.py", line 113, in __getitem__
+    return self._state[key]
+  File "/home/user/.local/lib/python3.8/site-packages/streamlit/runtime/state/session_state.py", line 378, in __getitem__
+    raise KeyError(_missing_key_error_message(key))
+KeyError: 'st.session_state has no key "generated". Did you forget to initialize it? More info: https://docs.streamlit.io/library/advanced-features/session-state#initialization'
 
 # Layout of input/response containers
 input_container = st.container()