Hi William, On 2014-05-28, William Stein <wst...@gmail.com> wrote: > With properties, guess what happens? Suppose f.something is a > property that's an immutable number, e.g., the determinant of a > matrix. > > sage: a = matrix(...) > sage: a.det? > docstring about integer!
That's not true, if det is a property: sage: class MyMatrix(object): ....: @property ....: def det(self): ....: "Determinants are computed by..." ....: return 5 ....: sage: m = MyMatrix() sage: m.det 5 sage: m.det? Type: property String Form:<property object at 0x904b2fc> Docstring: Determinants are computed by... > And the above just makes absolutely no sense. The user expects to get > a docstring about a function that computes the determinant, ... She in fact does. That's the difference between attributes and properties. However: > Another issue is that frequently in math we have algorithms/options to > functions, e.g., > > sage: a.det(algorithm="padic") > > Expressing the above with properties is awkward and hard to discover. +1 Best regards, Simon -- 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 http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
