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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_v1.py from the langchain codebase.

Function python LangChainCore Runnables calls 2

Entity Profile

Dependency Diagram

graph TD
  e005ead2_f2cd_df65_8d30_ce23227985ea["test_event_stream_with_triple_lambda()"]
  8ff41f3c_f250_f8de_8094_4f24860a10e0["test_runnable_events_v1.py"]
  e005ead2_f2cd_df65_8d30_ce23227985ea -->|defined in| 8ff41f3c_f250_f8de_8094_4f24860a10e0
  aac0453e_34cd_4dce_c7fa_f176ab20140b["_collect_events()"]
  e005ead2_f2cd_df65_8d30_ce23227985ea -->|calls| aac0453e_34cd_4dce_c7fa_f176ab20140b
  6ebe7fde_6e8f_dae5_d42f_9cea181617f5["_assert_events_equal_allow_superset_metadata()"]
  e005ead2_f2cd_df65_8d30_ce23227985ea -->|calls| 6ebe7fde_6e8f_dae5_d42f_9cea181617f5
  style e005ead2_f2cd_df65_8d30_ce23227985ea fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/runnables/test_runnable_events_v1.py lines 216–341

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="v1"))
    _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

Subdomains

Defined In

Calls

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_v1.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_v1.py at line 216.
What does test_event_stream_with_triple_lambda() call?
test_event_stream_with_triple_lambda() calls 2 function(s): _assert_events_equal_allow_superset_metadata, _collect_events.

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