Hi, Consider the following code (the field is arbitrary in this case) sage: code = codes.HammingCode(2, GF(4,'a'))
The codewords (vectors) cannot be changed (note the absence of an error): sage: code[0] (0, 0, 0, 0, 0) sage: code[0][0] = 1 sage: code[0] (0, 0, 0, 0, 0) yet they are not immutable, even when trying to set them so: sage: code[0].is_immutable() False sage: code[0].set_immutable() sage: code[0].is_immutable() False Is there any particular reason why the codewords are not immutable if they cannot be changed anyway? If they were, using them as dictionary keys would be less of a hassle: sage: {code[0]: "element"} TypeError: mutable vectors are unhashable I guess the current options are sage: v = code[0] sage: v.set_immutable() sage: {v: "element"} or sage: {tuple(code[0]): "element"} neither of which is particularly elegant. Is there a way to set the all of the codewords as immutable? I'm using Sage version 6.1.1 on a Linux machine. Gerli -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.