Thanx. It just popped in my mind.
in 3d programming there are transformation matrices like a=[[cos(x),sin(x),0],[-sin(x),cos(x),0],[0,0,1]] it is a 3x3 matrix. never changes during program. it can be defined like >>> def transmat(x): ... dummy=[[0,0,0],[0,0,0],[0,0,0]] ... dummy[0][0]=cos(x) ... ~~~~~~ ... return dummy a=transmat(1.0) it is usual way for this. i wonder if there is an automatic way to make that without calling a function. an automatic way that depends on changing the value of x. as each time x=something used the whole matrix changes automaticly. or maybe i am just dreaming. :) -- http://mail.python.org/mailman/listinfo/python-list
