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test_event_stream_with_triple_lambda() — langchain Function Reference

Architecture documentation for the test_event_stream_with_triple_lambda() function in test_runnable_events_v2.py from the langchain codebase.

Function python LangChainCore Runnables calls 1

Entity Profile

Dependency Diagram

graph TD
  0ce63d93_b537_f233_6fd9_00cf8f28b32f["test_event_stream_with_triple_lambda()"]
  33c02978_2077_5819_7048_bc2a81e80625["test_runnable_events_v2.py"]
  0ce63d93_b537_f233_6fd9_00cf8f28b32f -->|defined in| 33c02978_2077_5819_7048_bc2a81e80625
  716d2a5e_dc8e_3cae_e044_b56b06bee655["_collect_events()"]
  0ce63d93_b537_f233_6fd9_00cf8f28b32f -->|calls| 716d2a5e_dc8e_3cae_e044_b56b06bee655
  style 0ce63d93_b537_f233_6fd9_00cf8f28b32f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/runnables/test_runnable_events_v2.py lines 232–357

async def test_event_stream_with_triple_lambda() -> None:
    def reverse(s: str) -> str:
        """Reverse a string."""
        return s[::-1]

    r = RunnableLambda(func=reverse)

    chain = (
        r.with_config({"run_name": "1"})
        | r.with_config({"run_name": "2"})
        | r.with_config({"run_name": "3"})
    )
    events = await _collect_events(chain.astream_events("hello", version="v2"))
    _assert_events_equal_allow_superset_metadata(
        events,
        [
            {
                "data": {"input": "hello"},
                "event": "on_chain_start",
                "metadata": {},
                "name": "RunnableSequence",
                "run_id": "",
                "parent_ids": [],
                "tags": [],
            },
            {
                "data": {},
                "event": "on_chain_start",
                "metadata": {},
                "name": "1",
                "run_id": "",
                "parent_ids": [],
                "tags": ["seq:step:1"],
            },
            {
                "data": {"chunk": "olleh"},
                "event": "on_chain_stream",
                "metadata": {},
                "name": "1",
                "run_id": "",
                "parent_ids": [],
                "tags": ["seq:step:1"],
            },
            {
                "data": {},
                "event": "on_chain_start",
                "metadata": {},
                "name": "2",
                "run_id": "",
                "parent_ids": [],
                "tags": ["seq:step:2"],
            },
            {
                "data": {"input": "hello", "output": "olleh"},
                "event": "on_chain_end",
                "metadata": {},
                "name": "1",
                "run_id": "",
                "parent_ids": [],
                "tags": ["seq:step:1"],
            },
            {
                "data": {"chunk": "hello"},
                "event": "on_chain_stream",
                "metadata": {},
                "name": "2",
                "run_id": "",
                "parent_ids": [],
                "tags": ["seq:step:2"],
            },
            {
                "data": {},
                "event": "on_chain_start",
                "metadata": {},
                "name": "3",
                "run_id": "",
                "parent_ids": [],
                "tags": ["seq:step:3"],
            },
            {
                "data": {"input": "olleh", "output": "hello"},

Domain

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Defined In

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Source

Frequently Asked Questions

What does test_event_stream_with_triple_lambda() do?
test_event_stream_with_triple_lambda() is a function in the langchain codebase, defined in libs/core/tests/unit_tests/runnables/test_runnable_events_v2.py.
Where is test_event_stream_with_triple_lambda() defined?
test_event_stream_with_triple_lambda() is defined in libs/core/tests/unit_tests/runnables/test_runnable_events_v2.py at line 232.
What does test_event_stream_with_triple_lambda() call?
test_event_stream_with_triple_lambda() calls 1 function(s): _collect_events.

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