I knew that Sage converted literal integers to sage Integers on preparsing input, but had not realized until recently that the following would not work:
sage: [q for q in range(100) if q.is_square()] --------------------------------------------------------------------------- <type 'exceptions.AttributeError'> Traceback (most recent call last) /home/jec/<ipython console> in <module>() <type 'exceptions.AttributeError'>: 'int' object has no attribute 'is_square' --rather, one has to do this sage: [q for q in range(100) if Integer(q).is_square()] [0, 1, 4, 9, 16, 25, 36, 49, 64, 81] or even this: sage: [Integer(q) for q in range(100) if Integer(q).is_square()] [0, 1, 4, 9, 16, 25, 36, 49, 64, 81] if the elements of this list need further Integer methods to be called on them. I did eventually find the srange() function, but find its name rather un-guessable. Why s? Why not Irange, say? -- John Cremona --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
