Would it be reasonable for OpenUSD to try to convert TfWarning into python warning module warnings if there’s no registered delegate?
There are then multiple facilities in warnings module for silencing warnings, converting warnings to errors, or converting them to logging module.
I suspect this could be implemented as a boost python call policy that sets some state on the TfDiagnosticMgr so that in PostWarning, instead of _PrintDiagnostic, PyError_Warn is called instead.