I tried the (as I thought) nice compact form In [60]: a,b = (zeros((2,)),)*2
But... In [61]: b[0] = 2 In [62]: a Out[62]: array([ 2., 0.]) a and b are the _same_ array.... But In [68]: a,b = (zeros((2,)),zeros((2,))) In [69]: b[0] = 2 In [70]: a Out[70]: array([ 0., 0.]) is OK. a & b are independent in this case. I'm puzzled by this behaviour, I suspect because of my ignorance of how tuples work. It looks to me like a,b = (zeros((2,)),)*2 is equivalent to x= zeros((2,)) a,b=(x,)*2 If this is indeed a feature rather than a bug, is there an alternative compact way to allocate many arrays? Regards, George. _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
