> I wonder if there is a reason for this. Do the additions break the > lexeme or is there a syntactic ambiguity...
William or Mike H. would know for sure, but I believe the additions are all invalid Python which happen to be convenient mathematics :) > > And using the preparse() command to find out how Sage > > "really" constructs the ring will still be helpful for creating a Sage > > library Python file. > > Hmm. So sage library files are all in python. This is going to be > difficult to explain.... > > So presumably when constructing polynomials you need to use ** instead > of ^, but it does *not* mean you can't use all the nice _functions_ > Sage provides for handling polynomials. That is not what is meant by > Sage only accepts pure python from a .py file (which Sage library > files are). It merely means that some nice syntactical sugar, such as > R.<x,y,x> and ZZ[] and ^ aren't available in .py files. You can still > use those things, you just have to type them in a slightly different > way that is "valid python" (though python.exe wouldn't accept them > without quite a bit of setting up.....) > Yup, I guess. I don't know anything about python.exe - we're talking now about files that would be included in the Sage library. > > from sage.rings.polynomial.polynomial_ring_constructor import > > PolynomialRing > > Well, this is an example of where the source doesn't seem to import > anything. ? seems clear to me, but maybe I'm being vague. > It's also not really clear how you divined that you should > import PolynomialRing. My guess would have been: > > from sage.rings.polynomial import polynomial_ring_constructor No, because the thing in the preparse output used PolynomialRing, which then we learned from ? lived in polynomial_ring_constructor. Though the actual question from that standpoint has already been answered, I hope. - kcrisman -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
