Function _handle_import_error

Lib/multiprocessing/forkserver.py:232–244

Handle an import error according to the on_error policy.

(on_error, modinfo, exc, *, warn_stacklevel)

#

def _handle_import_error(on_error, modinfo, exc, *, warn_stacklevel):
    """Handle an import error according to the on_error policy."""
    match on_error:
        case 'fail':
            raise
        case 'warn':
            warnings.warn(
                f"Failed to preload {modinfo}: {exc}",
                ImportWarning,
                stacklevel=warn_stacklevel + 1
            )
        case 'ignore':
            pass


def _handle_preload(preload, main_path=None, sys_path=None, sys_argv=None,