1.Suggest that testing equality of floats is not exact – Use abs(x-y) < 0.0001, rather than x == y
2. str.swapcase():upper to lower,lower to upper, a copy
1.Suggest that testing equality of floats is not exact – Use abs(x-y) < 0.0001, rather than x == y
2. str.swapcase():upper to lower,lower to upper, a copy