changing the values of the diagonal of a matrix in numpy

Question

how can I change the values of the diagonal of a matrix in numpy?

I checked Numpy modify ndarray diagonal, but the function there is not implemented in numpy v 1.3.0

Answer 1

>>> a = numpy.random.rand(2,2)
>>> a
array([[ 0.41668355,  0.07982691], 
       [ 0.60790982,  0.0314224 ]])
>>> a - numpy.diag(numpy.diag(a))
array([[ 0.        ,  0.07982691],
       [ 0.60790982,  0.        ]])