pyhelios.wrappers.UParameterOptimizationWrapper._CallbackState Class Reference

Carries a Python exception raised inside a callback back to the caller. More...

Detailed Description

Carries a Python exception raised inside a callback back to the caller.

A Python exception cannot propagate through the intervening C++ frames. Worse, ctypes does not even let it escape the callback: it prints the traceback via PyErr_WriteUnraisable and returns 0 to C++, and 0 is a perfectly plausible objective value, so the optimizer would carry on and return a confidently wrong answer.

Instead the trampoline catches everything, stores it here, and raises the error flag. The native side unwinds and returns PARAMOPT_CALLBACK_FAILED, and the caller re-raises the stored exception with its original traceback.

Definition at line 425 of file UParameterOptimizationWrapper.py.

Public Member Functions
	__init__ (self)

Public Attributes
Optional[Tuple]	exception = None

Constructor & Destructor Documentation

__init__()

pyhelios.wrappers.UParameterOptimizationWrapper._CallbackState.__init__

(

self

)

Definition at line 429 of file UParameterOptimizationWrapper.py.

Member Data Documentation

exception

Optional[Tuple] pyhelios.wrappers.UParameterOptimizationWrapper._CallbackState.exception = None

Definition at line 430 of file UParameterOptimizationWrapper.py.

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The documentation for this class was generated from the following file:

• pyhelios/wrappers/UParameterOptimizationWrapper.py