Recent tags change causes AttributeError: 'str' object has no attribute 'value' on initialize_agent call

[LittleColin]

System Info

• Langchain: 0.0.215
• Platform: ubuntu
• Python 3.10.12

Who can help?

@vowelparrot

https://github.com/hwchase17/langchain/blob/d84a3bcf7ab3edf8fe1d49083e066d51c9b5f621/langchain/agents/initialize.py#L54

Information

• The official example notebooks/scripts
• My own modified scripts

Related Components

• LLMs/Chat Models
• Embedding Models
• Prompts / Prompt Templates / Prompt Selectors
• Output Parsers
• Document Loaders
• Vector Stores / Retrievers
• Memory
• Agents / Agent Executors
• Tools / Toolkits
• Chains
• Callbacks/Tracing
• Async

Reproduction

Fails if agent initialized as follows:

agent = initialize_agent(
        agent='zero-shot-react-description',
        tools=tools,
        llm=llm,
        verbose=True,
        max_iterations=30,
        memory=ConversationBufferMemory(),
        handle_parsing_errors=True)

With

...
lib/python3.10/site-packages/langchain/agents/initialize.py", line 54, in initialize_agent
    tags_.append(agent.value)
AttributeError: 'str' object has no attribute 'value'

Expected behavior

Expected to work as before where agent is specified as a string (or if this is highlighting that agent should actually be an object, it should indicate that instead of the error being shown).

[nithinjp1997]

yes i also got this error too. Apparently we have to use AgentType.ZERO_SHOT_REACT_DESCRIPTION , the old way of using just strings has been changed . At the very least they could have shown an exception error instead of this jargon.

[Zero-coder]

agree!the same to me!

[vowelparrot]

Will land a fix. Thanks for raising this!

[Zero-coder]

Will land a fix. Thanks for raising this!

Thank you,it's working now.