api_errors.py 文件源码

def _convert_error(e, ignored_errors=EmptyI):
        """Converts the provided exception into an ApiException equivalent if
        possible.  Returns a new exception object if converted or the original
        if not.

        'ignored_errors' is an optional list of errno values for which None
        should be returned.
        """

        if not hasattr(e, "errno"):
                return e
        if e.errno in ignored_errors:
                return None
        if e.errno in (errno.EACCES, errno.EPERM):
                return PermissionsException(e.filename)
        if e.errno == errno.EROFS:
                return ReadOnlyFileSystemException(e.filename)
        return e