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log_error_once() — langchain Function Reference

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

Function python Observability Tracers called by 2

Entity Profile

Dependency Diagram

graph TD
  2c07d5a6_0b43_cd17_8e75_6b8d83c1e656["log_error_once()"]
  34ac5e02_6299_266f_403f_f48ad1969c05["langchain.py"]
  2c07d5a6_0b43_cd17_8e75_6b8d83c1e656 -->|defined in| 34ac5e02_6299_266f_403f_f48ad1969c05
  cf43defe_cb35_deb4_9782_55f973cdf6ca["_persist_run_single()"]
  cf43defe_cb35_deb4_9782_55f973cdf6ca -->|calls| 2c07d5a6_0b43_cd17_8e75_6b8d83c1e656
  bce3427a_d6ea_f317_a362_d28206fa1696["_update_run_single()"]
  bce3427a_d6ea_f317_a362_d28206fa1696 -->|calls| 2c07d5a6_0b43_cd17_8e75_6b8d83c1e656
  style 2c07d5a6_0b43_cd17_8e75_6b8d83c1e656 fill:#6366f1,stroke:#818cf8,color:#fff

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Source Code

libs/core/langchain_core/tracers/langchain.py lines 38–48

def log_error_once(method: str, exception: Exception) -> None:
    """Log an error once.

    Args:
        method: The method that raised the exception.
        exception: The exception that was raised.
    """
    if (method, type(exception)) in _LOGGED:
        return
    _LOGGED.add((method, type(exception)))
    logger.error(exception)

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Frequently Asked Questions

What does log_error_once() do?
log_error_once() is a function in the langchain codebase, defined in libs/core/langchain_core/tracers/langchain.py.
Where is log_error_once() defined?
log_error_once() is defined in libs/core/langchain_core/tracers/langchain.py at line 38.
What calls log_error_once()?
log_error_once() is called by 2 function(s): _persist_run_single, _update_run_single.

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