multiple: langchain 0.2 in master (#21191)

0.2rc 

migrations

- [x] Move memory
- [x] Move remaining retrievers
- [x] graph_qa chains
- [x] some dependency from evaluation code potentially on math utils
- [x] Move openapi chain from `langchain.chains.api.openapi` to
`langchain_community.chains.openapi`
- [x] Migrate `langchain.chains.ernie_functions` to
`langchain_community.chains.ernie_functions`
- [x] migrate `langchain/chains/llm_requests.py` to
`langchain_community.chains.llm_requests`
- [x] Moving `langchain_community.cross_enoders.base:BaseCrossEncoder`
->
`langchain_community.retrievers.document_compressors.cross_encoder:BaseCrossEncoder`
(namespace not ideal, but it needs to be moved to `langchain` to avoid
circular deps)
- [x] unit tests langchain -- add pytest.mark.community to some unit
tests that will stay in langchain
- [x] unit tests community -- move unit tests that depend on community
to community
- [x] mv integration tests that depend on community to community
- [x] mypy checks

Other todo

- [x] Make deprecation warnings not noisy (need to use warn deprecated
and check that things are implemented properly)
- [x] Update deprecation messages with timeline for code removal (likely
we actually won't be removing things until 0.4 release) -- will give
people more time to transition their code.
- [ ] Add information to deprecation warning to show users how to
migrate their code base using langchain-cli
- [ ] Remove any unnecessary requirements in langchain (e.g., is
SQLALchemy required?)

---------

Co-authored-by: Erick Friis <erick@langchain.dev>

libs/community/langchain_community/chains/openapi/prompts.py

@@ -0,0 +1,57 @@
+# flake8: noqa
+REQUEST_TEMPLATE = """You are a helpful AI Assistant. Please provide JSON arguments to agentFunc() based on the user's instructions.
+
+API_SCHEMA: ```typescript
+{schema}
+```
+
+USER_INSTRUCTIONS: "{instructions}"
+
+Your arguments must be plain json provided in a markdown block:
+
+ARGS: ```json
+{{valid json conforming to API_SCHEMA}}
+```
+
+Example
+-----
+
+ARGS: ```json
+{{"foo": "bar", "baz": {{"qux": "quux"}}}}
+```
+
+The block must be no more than 1 line long, and all arguments must be valid JSON. All string arguments must be wrapped in double quotes.
+You MUST strictly comply to the types indicated by the provided schema, including all required args.
+
+If you don't have sufficient information to call the function due to things like requiring specific uuid's, you can reply with the following message:
+
+Message: ```text
+Concise response requesting the additional information that would make calling the function successful.
+```
+
+Begin
+-----
+ARGS:
+"""
+RESPONSE_TEMPLATE = """You are a helpful AI assistant trained to answer user queries from API responses.
+You attempted to call an API, which resulted in:
+API_RESPONSE: {response}
+
+USER_COMMENT: "{instructions}"
+
+
+If the API_RESPONSE can answer the USER_COMMENT respond with the following markdown json block:
+Response: ```json
+{{"response": "Human-understandable synthesis of the API_RESPONSE"}}
+```
+
+Otherwise respond with the following markdown json block:
+Response Error: ```json
+{{"response": "What you did and a concise statement of the resulting error. If it can be easily fixed, provide a suggestion."}}
+```
+
+You MUST respond as a markdown json code block. The person you are responding to CANNOT see the API_RESPONSE, so if there is any relevant information there you must include it in your response.
+
+Begin:
+---
+"""