dosubot[bot]
commented
8 months ago 🤖
Hello again, @Tejasree-Reddy!
Nice to see you contributing to LangChain again. Your dedication to improving the project is always appreciated!
Hope you're having a good day!
From the error message and the code you've provided, it seems like the retriever attribute is not being properly initialized in the st.session_state object.
In your init_session_state() function, you're returning a SessionState() object, but you're not initializing the retriever attribute.
def init_session_state():
return SessionState()Then, you're checking if retriever is in st.session_state and if it's not, you're trying to set it with the settings() function.
if 'retriever' not in st.session_state:
st.session_state['retriever'], st.session_state['llm'] = settings()However, if the settings() function does not return a retriever object, then st.session_state['retriever'] will still be uninitialized, and trying to access it later in your code will result in the AttributeError you're seeing.
To fix this issue, you need to ensure that the settings() function is correctly returning a retriever object. You could add some debugging code to check the return value of the settings() function, like so:
retriever, llm = settings()
print(f"Retriever: {retriever}, LLM: {llm}")If retriever is None or not an instance of the expected class, then you'll need to debug the settings() function to find out why it's not returning the correct objects.
Also, please ensure that the settings() function is correctly implemented and returns a tuple with the retriever and llm objects. If the settings() function is not implemented or not correctly returning these objects, you will need to fix this before you can use them in your st.session_state object.
I hope this helps! If you have any more questions or need further clarification, feel free to ask.
Here is the Streamlit documentation on session state for your reference.
Sources
- libs/langchain/langchain/chains/conversational_retrieval/base.py
- libs/langchain/langchain/schema/retriever.py
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Tejasree-Reddy
murdadesmaeeli
Checked other resources
Example Code
st.header("
Interweb Explorer") st.info("I am an AI that can answer questions by exploring, reading, and summarizing web pages." "I can be configured to use different modes: public API or private (no data sharing).")def init_session_state(): return SessionState()
.get(retriever=None, llm=None)
Make retriever and llm
session_state = init_session_state()
Make retriever and llm
if 'retriever' not in st.session_state: st.session_state['retriever'], st.session_state['llm'] = settings()
if session_state.retriever is None:
session_state.retriever, session_state.llm = settings()
web_retriever = st.session_state.retriever llm = st.session_state.llm
Error Message and Stack Trace (if applicable)
embedding_functionis expected to be an Embeddings object, support for passing in a function will soon be removed.KeyError Traceback (most recent call last) File ~/.local/lib/python3.8/site-packages/streamlit/runtime/state/session_state.py:378, in SessionState.getitem(self, key) 377 try: --> 378 return self._getitem(widget_id, key) 379 except KeyError:
File ~/.local/lib/python3.8/site-packages/streamlit/runtime/state/session_state.py:423, in SessionState._getitem(self, widget_id, user_key) 422 # We'll never get here --> 423 raise KeyError
KeyError:
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last) File ~/.local/lib/python3.8/site-packages/streamlit/runtime/state/session_state_proxy.py:119, in SessionStateProxy.getattr(self, key) 118 try: --> 119 return self[key] 120 except KeyError:
File ~/.local/lib/python3.8/site-packages/streamlit/runtime/state/session_state_proxy.py:90, in SessionStateProxy.getitem(self, key) 89 require_valid_user_key(key) ---> 90 return get_session_state()[key]
File ~/.local/lib/python3.8/site-packages/streamlit/runtime/state/safe_session_state.py:113, in SafeSessionState.getitem(self, key) 111 raise KeyError(key) --> 113 return self._state[key]
File ~/.local/lib/python3.8/site-packages/streamlit/runtime/state/session_state.py:380, in SessionState.getitem(self, key) 379 except KeyError: --> 380 raise KeyError(_missing_key_error_message(key))
KeyError: 'st.session_state has no key "retriever". Did you forget to initialize it? More info: https://docs.streamlit.io/library/advanced-features/session-state#initialization'
During handling of the above exception, another exception occurred:
AttributeError Traceback (most recent call last) Cell In[12], line 18 14 st.session_state['retriever'], st.session_state['llm'] = settings() 16 # if session_state.retriever is None: 17 # session_state.retriever, session_state.llm = settings() ---> 18 web_retriever = st.session_state.retriever 19 llm = st.session_state.llm
File ~/.local/lib/python3.8/site-packages/streamlit/runtime/state/session_state_proxy.py:121, in SessionStateProxy.getattr(self, key) 119 return self[key] 120 except KeyError: --> 121 raise AttributeError(_missing_attr_error_message(key))
AttributeError: st.session_state has no attribute "retriever". Did you forget to initialize it? More info: https://docs.streamlit.io/library/advanced-features/session-state#initialization
Description
AttributeError: st.session_state has no attribute "retriever". Did you forget to initialize it?
System Info
streamlit==1.25.0 langchain==0.0.244
chromadb==0.4.3
openai==0.27.8 html2text==2020.1.16 google-api-core==2.11.1 google-api-python-client==2.95.0 google-auth==2.22.0 google-auth-httplib2==0.1.0 googleapis-common-protos==1.59.1 tiktoken==0.4.0 faiss-cpu==1.7.4