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on_chain_start() — langchain Function Reference

Architecture documentation for the on_chain_start() function in callbacks.py from the langchain codebase.

Function python LangChainCore MessageInterface calls 2 called by 1

Entity Profile

Dependency Diagram

graph TD
  f29c520d_aec7_4094_e6a4_0952ad5c19fe["on_chain_start()"]
  9659be4f_91d1_3b62_bcfb_38c048777165["FakeCallbackHandler"]
  f29c520d_aec7_4094_e6a4_0952ad5c19fe -->|defined in| 9659be4f_91d1_3b62_bcfb_38c048777165
  384fe498_9ddc_498d_0cf1_16d50c1cc982["on_chain_start()"]
  384fe498_9ddc_498d_0cf1_16d50c1cc982 -->|calls| f29c520d_aec7_4094_e6a4_0952ad5c19fe
  6ba1abfc_819f_69c3_6739_700fc7fb31d5["on_chain_start_common()"]
  f29c520d_aec7_4094_e6a4_0952ad5c19fe -->|calls| 6ba1abfc_819f_69c3_6739_700fc7fb31d5
  384fe498_9ddc_498d_0cf1_16d50c1cc982["on_chain_start()"]
  f29c520d_aec7_4094_e6a4_0952ad5c19fe -->|calls| 384fe498_9ddc_498d_0cf1_16d50c1cc982
  style f29c520d_aec7_4094_e6a4_0952ad5c19fe fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/fake/callbacks.py lines 183–188

    def on_chain_start(
        self,
        *args: Any,
        **kwargs: Any,
    ) -> Any:
        self.on_chain_start_common()

Domain

Subdomains

Defined In

Calls

Called By

Source

Frequently Asked Questions

What does on_chain_start() do?
on_chain_start() is a function in the langchain codebase, defined in libs/core/tests/unit_tests/fake/callbacks.py.
Where is on_chain_start() defined?
on_chain_start() is defined in libs/core/tests/unit_tests/fake/callbacks.py at line 183.
What does on_chain_start() call?
on_chain_start() calls 2 function(s): on_chain_start, on_chain_start_common.
What calls on_chain_start()?
on_chain_start() is called by 1 function(s): on_chain_start.

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