Func# Todo Fill overview page zfit.func.BaseFuncV1([obs, dtype, name, params]) TODO(docs): explain subclassing. zfit.func.SimpleFuncV1(obs, func[, name]) Create a simple function out of of func with the observables obs depending on parameters. zfit.func.ProdFunc(funcs[, obs, name]) zfit.func.SumFunc(funcs[, obs, name])