On Mon, 31 Dec 2007 11:45:55 +0100, Stef Mientki wrote: > hello, > > I had a program that worked perfectly well. In this program modules were > dynamically added, just by putting the file in a predefined directory. > > Now one of the interface mechanisms was to see if some parameter was > changed in a an instance, > by comparing the value from the instance with its previous value > > This went all well, untill I added a too complex variable, then the > program stopped working, without generating exceptions.
What do you mean "stopped working"? > So it seems that comparing a too complex value isn't allowed. the > variable was something like: > > A = [ <ndarray>, <ndarray>, ..., [<color>,<color>,...], [<float>, > <float>, ... ] ] Doesn't seem complex to me, and I daresay probably not to Python either -- although a lot depends on what "ndarray" and "colour" are. > So what I need was something like: > if A != A_prev : > ... do something > A_prev = A > > And this crashes, or at least it doesn't work but also doesn't generate > exceptions. It "crashes"? Explain please. > It does seems to work, if A only contains 1 array. > > Why am I not allowed to compare A and A_prev ?? And in general, how > complex might a list be to make a valid comparison, or what are the > rules ? As complicated as you like. -- Steven -- http://mail.python.org/mailman/listinfo/python-list