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vwp/openapi_with_tool_retrieval
harrison/aws-text
ankush/patch1
harrison/processor
harrison/script-update
harrison/api-chain
harrison/ai21-embeddings
harrison/alpaca
nc/poe-handler-chat-model
nc/poe-handler
harrison/mrkl-parser
harrison/agent-experiments
harrison/replicate
harrison/chat-chain
harrison/update-wandb
harrison/debug
harrison/qasper
harrison/dbpedia
harrison/changes
jeremy/guardrails
nc/guardrails-error-handling
harrison/guardrails
harrison/use-output-parsers
John-Church-guard
agent_evaluation
harrison/kor-chain
harrison/inference-api
ankush/callback-refactor
harrison/eval
harrison/audio
ankush/prompt-abstractions
harrison/memory-chat
harrison/indexes
ankush/partial-prompt-apply
harrison/sagemaker
harrison/datetime
harrison/openapiagent
harrison/paged-pdf
harrison/pswsl
ankush/example-runner
harrison/guards
scad/api-chain
harrison/prompt-bugs
harrison/sql-agent
harrison/pinecone-try-except
harrison/callback-updates
harrison/map-rerank
harrison/combine-docs-parse
harrison/azure-rfc
harrison/sequential_chain_from_prompts
harrison/agent-refactor
harrison/agent_intermediate_steps
harrison/agent_multi_inputs
harrison/promot-mrkl
harrison/fix_logging_api
harrison/use_output_parser
harrison/track_intermediate_steps
harrison/sql_error
harrison/logging_to_file
harrison/output_parser
harrison/flexible_model_args
harrison/agent-improvements
harrison/router_docs
harrison/docs
samantha/add_llm_to_example
harrison/reorg_smart_chains
mako-templates
harrison/save_metadatas
harrison/router
harrison/custom_pipeline
harrison/chain_pipeline
harrison/prompts_docs
harrison/attempt_citing_in_prompt
harrison/load_prompt
harrison/prompts_take_2
harrison/ape
harrison/prompt_examples
harrison/add_dependencies
langchain-ai21==0.1.4
langchain-ai21==0.1.5
langchain-ai21==0.1.6
langchain-ai21==0.1.7
langchain-airbyte==0.1.1
langchain-anthropic==0.1.12
langchain-anthropic==0.1.13
langchain-anthropic==0.1.14rc1
langchain-anthropic==0.1.14rc2
langchain-anthropic==0.1.15
langchain-anthropic==0.1.16
langchain-anthropic==0.1.17
langchain-anthropic==0.1.18
langchain-anthropic==0.1.19
langchain-anthropic==0.1.20
langchain-anthropic==0.1.21
langchain-anthropic==0.1.22
langchain-anthropic==0.1.23
langchain-anthropic==0.2.0
langchain-anthropic==0.2.0.dev0
langchain-anthropic==0.2.0.dev1
langchain-anthropic==0.2.1
langchain-anthropic==0.2.2
langchain-anthropic==0.2.3
langchain-azure-dynamic-sessions==0.1.0
langchain-azure-dynamic-sessions==0.1.0rc0
langchain-azure-dynamic-sessions==0.2.0
langchain-box==0.1.0
langchain-box==0.2.0
langchain-box==0.2.1
langchain-chroma==0.1.1
langchain-chroma==0.1.2
langchain-chroma==0.1.4
langchain-cli==0.0.22
langchain-cli==0.0.23
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langchain-cli==0.0.25
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langchain-cli==0.0.27
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langchain-cli==0.0.29
langchain-cli==0.0.30
langchain-cli==0.0.31
langchain-community==0.0.35
langchain-community==0.0.36
langchain-community==0.0.37
langchain-community==0.0.38
langchain-community==0.2.0
langchain-community==0.2.0rc1
langchain-community==0.2.1
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langchain-community==0.2.11
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langchain-community==0.2.13
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langchain-community==0.2.9
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langchain-community==0.3.0.dev1
langchain-community==0.3.0.dev2
langchain-community==0.3.1
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langchain-core==0.1.48
langchain-core==0.1.50
langchain-core==0.1.51
langchain-core==0.1.52
langchain-core==0.2.0
langchain-core==0.2.0rc1
langchain-core==0.2.1
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langchain-core==0.2.29rc1
langchain-core==0.2.2rc1
langchain-core==0.2.3
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langchain-core==0.2.41
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langchain-core==0.2.7
langchain-core==0.2.8
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langchain-nomic==0.1.0
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langchain-robocorp==0.0.10.post1
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langchain-upstage==0.1.4
langchain-upstage==0.1.5
langchain-voyageai==0.1.1
langchain-voyageai==0.1.2
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langchain==0.1.19
langchain==0.1.20
langchain==0.2.0
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Branches Tags
${ item.name }
Create tag ${ searchTerm }
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${ noResults }
langchain/libs/experimental
History
Martin Krasser 79ed66f870
EXPERIMENTAL Generic LLM wrapper to support chat model interface with configurable chat prompt format (#8295) 
## Update 2023-09-08

This PR now supports further models in addition to Lllama-2 chat models.
See [this comment](#issuecomment-1668988543) for further details. The
title of this PR has been updated accordingly.

## Original PR description

This PR adds a generic `Llama2Chat` model, a wrapper for LLMs able to
serve Llama-2 chat models (like `LlamaCPP`,
`HuggingFaceTextGenInference`, ...). It implements `BaseChatModel`,
converts a list of chat messages into the [required Llama-2 chat prompt
format](https://huggingface.co/blog/llama2#how-to-prompt-llama-2) and
forwards the formatted prompt as `str` to the wrapped `LLM`. Usage
example:

```python
# uses a locally hosted Llama2 chat model
llm = HuggingFaceTextGenInference(
    inference_server_url="http://127.0.0.1:8080/",
    max_new_tokens=512,
    top_k=50,
    temperature=0.1,
    repetition_penalty=1.03,
)

# Wrap llm to support Llama2 chat prompt format.
# Resulting model is a chat model
model = Llama2Chat(llm=llm)

messages = [
    SystemMessage(content="You are a helpful assistant."),
    MessagesPlaceholder(variable_name="chat_history"),
    HumanMessagePromptTemplate.from_template("{text}"),
]

prompt = ChatPromptTemplate.from_messages(messages)
memory = ConversationBufferMemory(memory_key="chat_history", return_messages=True)
chain = LLMChain(llm=model, prompt=prompt, memory=memory)

# use chat model in a conversation
# ...
```

Also part of this PR are tests and a demo notebook.

- Tag maintainer: @hwchase17
- Twitter handle: `@mrt1nz`

---------

Co-authored-by: Erick Friis <erick@langchain.dev>
 		11 months ago
..
langchain_experimental EXPERIMENTAL Generic LLM wrapper to support chat model interface with configurable chat prompt format (#8295) 11 months ago
tests EXPERIMENTAL Generic LLM wrapper to support chat model interface with configurable chat prompt format (#8295) 11 months ago
Makefile Install and use `ruff format` instead of black for code formatting. (#12585) 11 months ago
README.md CONTRIBUTING.md Quick Start: focus on langchain core; clarify docs and experimental are separate (#10906) 1 year ago
poetry.lock EXPERIMENTAL Generic LLM wrapper to support chat model interface with configurable chat prompt format (#8295) 11 months ago
poetry.toml Harrison/move experimental (#8084) 1 year ago
pyproject.toml EXPERIMENTAL Generic LLM wrapper to support chat model interface with configurable chat prompt format (#8295) 11 months ago

README.md
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🦜️🧪 LangChain Experimental

This package holds experimental LangChain code, intended for research and experimental uses.

[!WARNING] Portions of the code in this package may be dangerous if not properly deployed in a sandboxed environment. Please be wary of deploying experimental code to production unless you've taken appropriate precautions and have already discussed it with your security team.

Some of the code here may be marked with security notices. However, given the exploratory and experimental nature of the code in this package, the lack of a security notice on a piece of code does not mean that the code in question does not require additional security considerations in order to be safe to use.