[Numpy-discussion] building an array using smaller ones

Hello everybody, I wonder how I could most easily accomplish the following: Say I have sth like: a = array( [1, 2] ) and I want to use this array to build another array in the following sence: b = array( [[1, 2, 3, a], [5, a, 6, 7], [0, 2-a, 3, 4]]) # this doesn't work I would like to obtain b = array( [[1, 2, 3, 1, 2], [5 ,1 ,2 ,6 ,7], [0, 1, 0, 3, 4]] ) I know a rather complicated way but believe there must be an easy one. Thank you very much. Ruda