Many thanks for the 2 previous help ! About operator.add and expr.variables()...
The (real-?) last question is a=4*x b=4/3*x c=4.0*x d=4*I*x I can get the constant by a.operands(), a.operands()[-1], but how can I test (without error) if this term is an integer, a rational, a float or a complex before next Sage improvement ? I can force a coerce by expr._integer(), but I get an error if expr (an expression) isn't a integer ? Must I define a function with a trap error ? There is also a _rational_() method for this retract. I don't find the method for float and complex. F. again... --~--~---------~--~----~------------~-------~--~----~ To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
