Commit Graph

79 Commits

Author SHA1 Message Date
Tze Min
6ef718c5f4
Core: fix Anthropic json issue in streaming (#16670)
**Description:** fix ChatAnthropic json issue in streaming 
**Issue:** https://github.com/langchain-ai/langchain/issues/16423
**Dependencies:** n/a

---------

Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>
2024-01-28 16:41:17 -08:00
William FH
38425c99d2
core[minor]: Image prompt template (#14263)
Builds on Bagatur's (#13227). See unit test for example usage (below)

```python
def test_chat_tmpl_from_messages_multipart_image() -> None:
    base64_image = "abcd123"
    other_base64_image = "abcd123"
    template = ChatPromptTemplate.from_messages(
        [
            ("system", "You are an AI assistant named {name}."),
            (
                "human",
                [
                    {"type": "text", "text": "What's in this image?"},
                    # OAI supports all these structures today
                    {
                        "type": "image_url",
                        "image_url": "data:image/jpeg;base64,{my_image}",
                    },
                    {
                        "type": "image_url",
                        "image_url": {"url": "data:image/jpeg;base64,{my_image}"},
                    },
                    {"type": "image_url", "image_url": "{my_other_image}"},
                    {
                        "type": "image_url",
                        "image_url": {"url": "{my_other_image}", "detail": "medium"},
                    },
                    {
                        "type": "image_url",
                        "image_url": {"url": "https://www.langchain.com/image.png"},
                    },
                    {
                        "type": "image_url",
                        "image_url": {"url": "data:image/jpeg;base64,foobar"},
                    },
                ],
            ),
        ]
    )
    messages = template.format_messages(
        name="R2D2", my_image=base64_image, my_other_image=other_base64_image
    )
    expected = [
        SystemMessage(content="You are an AI assistant named R2D2."),
        HumanMessage(
            content=[
                {"type": "text", "text": "What's in this image?"},
                {
                    "type": "image_url",
                    "image_url": {"url": f"data:image/jpeg;base64,{base64_image}"},
                },
                {
                    "type": "image_url",
                    "image_url": {
                        "url": f"data:image/jpeg;base64,{other_base64_image}"
                    },
                },
                {
                    "type": "image_url",
                    "image_url": {"url": f"{other_base64_image}"},
                },
                {
                    "type": "image_url",
                    "image_url": {
                        "url": f"{other_base64_image}",
                        "detail": "medium",
                    },
                },
                {
                    "type": "image_url",
                    "image_url": {"url": "https://www.langchain.com/image.png"},
                },
                {
                    "type": "image_url",
                    "image_url": {"url": "data:image/jpeg;base64,foobar"},
                },
            ]
        ),
    ]
    assert messages == expected
```

---------

Co-authored-by: Bagatur <baskaryan@gmail.com>
Co-authored-by: Brace Sproul <braceasproul@gmail.com>
2024-01-27 17:04:29 -08:00
Nuno Campos
52ccae3fb1
Accept message-like things in Chat models, LLMs and MessagesPlaceholder (#16418) 2024-01-26 15:44:28 -08:00
Bagatur
ef42d9d559
core[patch], community[patch], openai[patch]: consolidate openai tool… (#16485)
… converters

One way to convert anything to an OAI function:
convert_to_openai_function
One way to convert anything to an OAI tool: convert_to_openai_tool
Corresponding bind functions on OAI models: bind_functions, bind_tools
2024-01-25 13:18:46 -08:00
James Braza
d511366dd3
infra: absolute EXAMPLE_DIR path in core unit tests (#16325)
If you invoked testing from places besides `core/`, this `EXAMPLE_DIR`
path won't work. This PR makes`EXAMPLE_DIR` robust against invocation
location
2024-01-22 14:00:23 -08:00
Piotr Mardziel
1b9001db47
core[patch]: preserve inspect.iscoroutinefunction with @deprecated decorator (#16295)
Adjusted `deprecate` decorator to make sure decorated async functions
are still recognized as "coroutinefunction" by `inspect`.

Before change, functions such as `LLMChain.acall` which are decorated as
deprecated are not recognized as coroutine functions. After the change,
they are recognized:

```python
import inspect
from langchain import LLMChain

# Is false before change but true after.
inspect.iscoroutinefunction(LLMChain.acall)
```
2024-01-22 11:34:13 -08:00
Bagatur
1e29b676d5
core[patch]: simple fallback streaming (#16055) 2024-01-19 16:31:54 -08:00
Eugene Yurtsev
4ef0ed4ddc
astream_events: Add version parameter while method is in beta (#16290)
Add a version parameter while the method is in beta phase.

The idea is to make it possible to minimize making breaking changes for users while we're iterating on schema.

Once the API is stable we can assign a default version requirement.
2024-01-19 13:20:02 -05:00
Eugene Yurtsev
177af65dc4
core[minor]: RFC Add astream_events to Runnables (#16172)
This PR adds `astream_events` method to Runnables to make it easier to
stream data from arbitrary chains.

* Streaming only works properly in async right now
* One should use `astream()` with if mixing in imperative code as might
be done with tool implementations
* Astream_log has been modified with minimal additive changes, so no
breaking changes are expected
* Underlying callback code / tracing code should be refactored at some
point to handle things more consistently (OK for now)

- ~~[ ] verify event for on_retry~~ does not work until we implement
streaming for retry
- ~~[ ] Any rrenaming? Should we rename "event" to "hook"?~~
- [ ] Any other feedback from community?
- [x] throw NotImplementedError for `RunnableEach` for now

## Example

See this [Example
Notebook](dbbc7fa0d6/docs/docs/modules/agents/how_to/streaming_events.ipynb)
for an example with streaming in the context of an Agent

## Event Hooks Reference

Here is a reference table that shows some events that might be emitted
by the various Runnable objects.
Definitions for some of the Runnable are included after the table.


| event | name | chunk | input | output |

|----------------------|------------------|---------------------------------|-----------------------------------------------|-------------------------------------------------|
| on_chat_model_start | [model name] | | {"messages": [[SystemMessage,
HumanMessage]]} | |
| on_chat_model_stream | [model name] | AIMessageChunk(content="hello")
| | |
| on_chat_model_end | [model name] | | {"messages": [[SystemMessage,
HumanMessage]]} | {"generations": [...], "llm_output": None, ...} |
| on_llm_start | [model name] | | {'input': 'hello'} | |
| on_llm_stream | [model name] | 'Hello' | | |
| on_llm_end | [model name] | | 'Hello human!' |
| on_chain_start | format_docs | | | |
| on_chain_stream | format_docs | "hello world!, goodbye world!" | | |
| on_chain_end | format_docs | | [Document(...)] | "hello world!,
goodbye world!" |
| on_tool_start | some_tool | | {"x": 1, "y": "2"} | |
| on_tool_stream | some_tool | {"x": 1, "y": "2"} | | |
| on_tool_end | some_tool | | | {"x": 1, "y": "2"} |
| on_retriever_start | [retriever name] | | {"query": "hello"} | |
| on_retriever_chunk | [retriever name] | {documents: [...]} | | |
| on_retriever_end | [retriever name] | | {"query": "hello"} |
{documents: [...]} |
| on_prompt_start | [template_name] | | {"question": "hello"} | |
| on_prompt_end | [template_name] | | {"question": "hello"} |
ChatPromptValue(messages: [SystemMessage, ...]) |


Here are declarations associated with the events shown above:

`format_docs`:

```python
def format_docs(docs: List[Document]) -> str:
    '''Format the docs.'''
    return ", ".join([doc.page_content for doc in docs])

format_docs = RunnableLambda(format_docs)
```

`some_tool`:

```python
@tool
def some_tool(x: int, y: str) -> dict:
    '''Some_tool.'''
    return {"x": x, "y": y}
```

`prompt`:

```python
template = ChatPromptTemplate.from_messages(
    [("system", "You are Cat Agent 007"), ("human", "{question}")]
).with_config({"run_name": "my_template", "tags": ["my_template"]})
```
2024-01-18 21:27:01 -05:00
Eugene Yurtsev
ecd4f0a7ec
core[patch]: testing add chat model for unit-tests (#16209)
This PR adds a fake chat model for testing purposes.

Used in this PR: https://github.com/langchain-ai/langchain/pull/16172
2024-01-18 11:30:53 -05:00
Bagatur
c5656a4905
core[patch]: pass exceptions to fallbacks (#16048) 2024-01-16 09:36:43 -08:00
Nuno Campos
112208baa5
Passthrough configurable primitive values as tracer metadata (#15915)
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2024-01-11 18:47:55 -08:00
Erick Friis
656e87beb9
core[patch]: add alternative_import to deprecated (#15781) 2024-01-09 14:45:28 -08:00
Eugene Yurtsev
b508fcce65
core(minor): Add a way to print out system information for debugging purposes. (#15718)
To use: 

```bash
python -m langchain_core.sys_info
```
2024-01-08 12:20:18 -08:00
Nuno Campos
ef22559f1f
Populate streamed_output for all runs handled by atransform_stream_with_config (#15599)
This means that users of astream_log() now get streamed output of
virtually all requested runs, whereas before the only streamed output
would be for the root run and raw llm runs

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2024-01-07 19:35:43 -08:00
Bagatur
a7d023aaf0
core[patch], community[patch]: mark runnable context, lc load as beta (#15603) 2024-01-05 17:54:26 -05:00
Bagatur
e1fc4d5b95
core[patch]: add beta decorator (#15589) 2024-01-05 13:16:27 -05:00
Eugene Yurtsev
bf0b3cc0b5
core[patch]: Further restrict recursive URL loader (#15559)
Includes code from this PR:  https://github.com/langchain-ai/langchain/compare/HEAD...m0kr4n3:security/fix_ssrf 
with additional fixes 

Unit tests cover new test cases
2024-01-04 16:33:57 -05:00
Bagatur
b2f15738dd
core[patch], langchain[patch], community[patch]: Revert #15326 (#15546) 2024-01-04 10:39:37 -05:00
Antonio Pisani
d4a98e4e04
core: update json output parser (#15079)
- **Description:** changed json.py to handle additional cases of partial
json string to be parsed, basically by dropping the last character in
the string until a valid json string is found or the string is empty.
Also added additional test cases.
  
- **Issue:** function parse_partial_json could not parse cases where the
key is present but the value is not.

---------

Co-authored-by: Nuno Campos <nuno@langchain.dev>
2024-01-02 16:34:43 -08:00
Dariusz Kajtoch
15b6c049d4
core:adds tests for partial_variables (#15427)
**Description:** Added small tests to test partial_variables in
PromptTemplate. It was missing.
2024-01-02 15:00:06 -08:00
Nuno Campos
6810b4b0bc
Use tz-aware utc datetimes in tracer (#15187)
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2024-01-02 12:36:40 -08:00
Nuno Campos
9cbf14dec2
Fetch runnable config from context var inside runnable lambda and runnable generator (#15334)
- easier to write custom logic/loops with automatic tracing
- if you don't want to streaming support write a regular function and
pass to RunnableLambda
- if you do want streaming write a generator and pass it to
RunnableGenerator

```py
import json
from typing import AsyncIterator

from langchain_core.messages import BaseMessage, FunctionMessage, HumanMessage
from langchain_core.agents import AgentAction, AgentFinish
from langchain_core.prompts import ChatPromptTemplate, MessagesPlaceholder
from langchain_core.runnables import Runnable, RunnableGenerator, RunnablePassthrough
from langchain_core.tools import BaseTool

from langchain.agents.output_parsers import OpenAIFunctionsAgentOutputParser
from langchain.chat_models import ChatOpenAI
from langchain.tools.render import format_tool_to_openai_function


def _get_tavily():
    from langchain.tools.tavily_search import TavilySearchResults
    from langchain.utilities.tavily_search import TavilySearchAPIWrapper

    tavily_search = TavilySearchAPIWrapper()
    return TavilySearchResults(api_wrapper=tavily_search)


async def _agent_executor_generator(
    input: AsyncIterator[list[BaseMessage]],
    *,
    max_iterations: int = 10,
    tools: dict[str, BaseTool],
    agent: Runnable[list[BaseMessage], BaseMessage],
    parser: Runnable[BaseMessage, AgentAction | AgentFinish],
) -> AsyncIterator[BaseMessage]:
    messages = [m async for mm in input for m in mm]
    for _ in range(max_iterations):
        next_message = await agent.ainvoke(messages)
        yield next_message
        messages.append(next_message)

        parsed = await parser.ainvoke(next_message)
        if isinstance(parsed, AgentAction):
            result = await tools[parsed.tool].ainvoke(parsed.tool_input)
            next_message = FunctionMessage(name=parsed.tool, content=json.dumps(result))
            yield next_message
            messages.append(next_message)
        elif isinstance(parsed, AgentFinish):
            return


def get_agent_executor(tools: list[BaseTool], system_message: str):
    llm = ChatOpenAI(model="gpt-4-1106-preview", temperature=0, streaming=True)
    prompt = ChatPromptTemplate.from_messages(
        [
            ("system", system_message),
            MessagesPlaceholder(variable_name="messages"),
        ]
    )
    llm_with_tools = llm.bind(
        functions=[format_tool_to_openai_function(t) for t in tools]
    )

    agent = {"messages": RunnablePassthrough()} | prompt | llm_with_tools
    parser = OpenAIFunctionsAgentOutputParser()
    executor = RunnableGenerator(_agent_executor_generator)
    return executor.bind(
        tools={tool.name for tool in tools}, agent=agent, parser=parser
    )


agent = get_agent_executor([_get_tavily()], "You are a very nice agent!")


async def main():
    async for message in agent.astream(
        [HumanMessage(content="whats the weather in sf tomorrow?")]
    ):
        print(message)


if __name__ == "__main__":
    import asyncio

    asyncio.run(main())
```

results in this trace
https://smith.langchain.com/public/fa17f05d-9724-4d08-8fa1-750f8fcd051b/r
2024-01-02 12:16:39 -08:00
Ankush Gola
f50dba12ff
Calculate trace_id and dotted_order client side (#15351)
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2024-01-02 10:13:34 -08:00
Paresh Chiramel
9be08a1956
Update _retrieve_ref inside json_schema.py to include an isdigit() check (#14745)
- **Description:** Update _retrieve_ref inside json_schema.py to include
an isdigit() check
- **Issue:** This library is used inside dereference_refs inside
langchain_community.agent_toolkits.openapi.spec. When I read in a yaml
file which has references for "400", "401" etc; the line "out =
out[component]" causes a KeyError. The isdigit() check ensures that if
it is an integer like "400" or "401"; it converts it into integer before
using it as a key to prevent the error.
  - **Dependencies:** No dependencies
  - **Tag maintainer:** @baskaryan

---------

Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>
2024-01-01 16:25:42 -08:00
Nuno Campos
99000c612e
Propagate context vars in all classes/methods (#15329)
- Any direct usage of ThreadPoolExecutor or asyncio.run_in_executor
needs manual handling of context vars

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2023-12-29 15:59:00 -08:00
Ankush Gola
7eec8f2487
Delete V1 tracer and refactor tracer tests to core (#15326) 2023-12-29 15:55:56 -08:00
Nuno Campos
eb5e250188 Propagate context vars in all classes/methods
- Any direct usage of ThreadPoolExecutor or asyncio.run_in_executor needs manual handling of context vars
2023-12-29 12:34:03 -08:00
Harrison Chase
c3b3b77a11
[core] add test for json parser (#15297)
this should fail, but isnt

---------

Co-authored-by: Nuno Campos <nuno@langchain.dev>
2023-12-29 09:59:39 -08:00
Nuno Campos
ec090745a6
Improve markdown list parser (#15295)
- do not match text after - in the middle of a sentence

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2023-12-29 09:59:21 -08:00
Nuno Campos
36ceffd2cd
Strip code block fences and extra test from xml when doing streaming … (#15293)
…parse

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2023-12-28 16:37:15 -08:00
Harrison Chase
b86803153e
[core, langchain] modelio code improvements (#15277) 2023-12-28 12:56:20 -08:00
Nuno Campos
6a5a2fb9c8
Add .pick and .assign methods to Runnable (#15229)
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2023-12-27 13:35:34 -08:00
Nuno Campos
0252a24471
Implement nicer runnable seq constructor, Propagate name through Runn… (#15226)
…ableBinding

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2023-12-27 11:24:32 -08:00
Harrison Chase
4ad77f777e
[core] prompt changes (#15186)
change it to pass all variables through all the way in invoke
2023-12-26 15:52:17 -08:00
Nuno Campos
ccf9c8e0be
Better input and output schemas for chains that start or end with a R… (#15185)
…unnableAssign or RunnablePick

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2023-12-26 15:21:13 -08:00
Nuno Campos
8cdc633465
Implement RunnablePassthrough.pick() (#15184)
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2023-12-26 14:01:20 -08:00
Quy Tang
7ef25a3c1b
Implement stream and astream for RunnableLambda (#14794)
**Description:** Implement stream and astream methods for RunnableLambda
to make streaming work for functions returning Runnable
  - **Issue:** https://github.com/langchain-ai/langchain/issues/11998
  - **Dependencies:** No new dependencies
  - **Twitter handle:** https://twitter.com/qtangs

---------

Co-authored-by: Nuno Campos <nuno@langchain.dev>
2023-12-26 12:49:02 -08:00
Harrison Chase
b4a0d206d9
[core: minor] fix getters (#15181) 2023-12-26 12:32:55 -08:00
Harrison Chase
63916cfe35
[core] langauge model like (#15180) 2023-12-26 12:19:50 -08:00
Nuno Campos
a2d3042823
Improve graph repr for runnable passthrough and itemgetter (#15083)
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2023-12-22 16:05:48 -08:00
Nuno Campos
0d0901ea18
Nc/dec22/runnable graph lambda (#15078)
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2023-12-22 14:36:46 -08:00
Nuno Campos
7d5800ee51
Add Runnable.get_graph() to get a graph representation of a Runnable (#15040)
It can be drawn in ascii with Runnable.get_graph().draw()
2023-12-22 11:40:45 -08:00
Ran
129a929d69
infra: Fix test filesystem paths incompatible with windows (#14388)
- **Description:** This PR fixes test failures on Windows caused by path
handling differences and unescaped special characters in regex. The
failing tests are:
```
FAILED tests/unit_tests/storage/test_filesystem.py::test_yield_keys - AssertionError: assert ['key1', 'subdir\\key2'] == ['key1', 'subdir/key2']
FAILED tests/unit_tests/test_imports.py::test_importable_all - ModuleNotFoundError: No module named 'langchain_community.langchain_community\\adapters'
FAILED tests/unit_tests/tools/file_management/test_utils.py::test_get_validated_relative_path_errs_on_absolute - re.error: incomplete escape \U at position 53
FAILED tests/unit_tests/tools/file_management/test_utils.py::test_get_validated_relative_path_errs_on_parent_dir - re.error: incomplete escape \U at position 69
FAILED tests/unit_tests/tools/file_management/test_utils.py::test_get_validated_relative_path_errs_for_symlink_outside_root - re.error: incomplete escape \U at position 64
```

- **Issue:** fixes
https://github.com/langchain-ai/langchain/issues/11775 (partially)
- **Dependencies:** none
2023-12-21 13:45:42 -08:00
Nuno Campos
71076cceaf
Move json and xml parsers to core (#15026)
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2023-12-21 12:36:56 -08:00
Nuno Campos
d5533b7081
Add option to make messages placeholder optional (#15031)
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2023-12-21 12:36:37 -08:00
Nuno Campos
63e512b680
Implement streaming for all list output parsers (#14981)
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2023-12-21 11:30:35 -08:00
Quy Tang
42822484ef
core(minor): Implement stream and astream for RunnableBranch (#14805)
* This PR adds `stream` implementations to Runnable Branch.
* Runnable Branch still does not support `transform` so it'll break streaming if it happens in middle or end of sequence, but will work if happens at beginning of sequence.
* Fixes use the async callback manager for async methods
* Handle BaseException rather than Exception, so more errors could be logged as errors when they are encountered


---------

Co-authored-by: Eugene Yurtsev <eyurtsev@gmail.com>
2023-12-20 15:37:56 -05:00
Harrison Chase
193f107cb5
add methods to deserialize prompts that were old (#14857) 2023-12-18 13:45:08 -08:00
William FH
93c7eb4e6b
[Tracing] String Stacktrace (#14131)
Add full stacktrace
2023-12-14 22:15:07 -08:00