Hi William, > > Try putting " import sage.matrix.matrix" as the line *right* before > you use "sage.matrix.matrix.is_Matrix()". I.e., do the import in the > function, not at the module level. >
That is what I first tried. That results in the same error. I added the line import sage.matrix.matrix in the function __init__. What is strange is that another line I added at the same place from sage.rings.integer_ring import IntegerRing cause no trouble. I guess the problem is that __init__ function (in the class TermOrder in sage/rings/polynomial/term_order.py) is executed before the matrix modules are fully loaded into Sage. Am I right? If so, is there a workaround? Kwankyu --~--~---------~--~----~------------~-------~--~----~ 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 URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
