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I formed my matrix A from, A = random_matrix(QQ, 6, algorithm='echelonizable', rank=6, upper_bound=9), I then changed the ring to RDF (A.change_ring(RDF)) , I further obtain my SVD matrix (U, S, V = B.SVD()). How do i find the inverse of A using SVD

I formed my matrix A $A$ from, A = random_matrix(QQ, 6, algorithm='echelonizable', rank=6, upper_bound=9), upper_bound=9), I then changed the ring to RDF (A.change_ring(RDF)) (A.change_ring(RDF)) , I further obtain my SVD matrix (U, (U, S, V = B.SVD()). B.SVD()). How do i find the inverse of A using SVD