The rationale of removing "is_X(Z)" should be for consistency, not that it is implemented simply as "isinstance(Z, X_type)". I would assume "is_X(Z)" are mostly math questions, either simple or hard. I don't want to use "isinstance" to ask a math question.
So +1 for moving toward deprecating them in favor of "Z in Xs()", for consistency. Then "Z in Xs()" could be implemented either as "isinstance(Z, X_type)", "Z.is_x()", or something. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
