def test_deblock():
B = BlockMatrix([[MatrixSymbol('A_%d%d' % (i, j), n, n) for j in range(4)]
for i in range(4)])
assert deblock(reblock_2x2(B)) == B
def test_deblock():
B = BlockMatrix([[MatrixSymbol(f'A_{i:d}{j:d}', n, n) for j in range(4)]
for i in range(4)])
assert deblock(reblock_2x2(B)) == B
def test_deblock():
B = BlockMatrix([[MatrixSymbol('A_%d%d' % (i, j), n, n)
for j in range(4)]
for i in range(4)])
assert deblock(reblock_2x2(B)) == B