find_pickleable_exception

Find first pickleable exception base class.

With an exception instance, iterate over its super classes (by MRO)
and find the first super exception that's pickleable.  It does
not go below :exc:`Exception` (i.e., it skips :exc:`Exception`,
:class:`BaseException` and :class:`object`).  If that happens
you should use :exc:`UnpickleableException` instead.

def find_pickleable_exception(
    exc: BaseException,
    loads: callable = pickle.loads,
    dumps: callable = pickle.dumps
) - > Exception

Find first pickleable exception base class. With an exception instance, iterate over its super classes (by MRO) and find the first super exception that's pickleable. It does not go below :exc:Exception (i.e., it skips :exc:Exception, :class:BaseException and :class:object). If that happens you should use :exc:UnpickleableException instead.

Parameters

Name	Type	Description
exc	BaseException	The exception instance to inspect for pickleable parent classes.
loads	callable = pickle.loads	The decoding function used to verify if an exception can be reconstructed.
dumps	callable = pickle.dumps	The encoding function used to verify if an exception can be serialized.

Returns

Type	Description
Exception	Nearest pickleable parent exception class (except :exc:Exception and parents), or if the exception is pickleable it will return :const:None.