John H Palmieri <jhpalmier...@gmail.com> writes: > class AlgebraIdeal(object): > def __init__(self, A, gens = []): > if not isinstance(A, Algebra): raise TypeError, "Argument A > must be an algebra." > self.__algebra = A > self.__gens = gens
[...] > sage: J = AlgebraIdeal(R, [y^2]) > > Then J.__gens is not defined, and neither is J.__algebra. Instead, > J._AlgebraIdeal__gens and J._AlgebraIdeal__algebra are defined, with > the appropriate values. This name mangling is python's way of having "private" identifiers in a class. You aren't supposed to access things starting with two leading underscores outside of the class. See http://docs.python.org/tutorial/classes.html Dan --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
