hyper.py 文件源码

def __new__(cls, *args):
        if len(args) == 5:
            args = [(args[0], args[1]), (args[2], args[3]), args[4]]
        if len(args) != 3:
            raise TypeError("args must be either as, as', bs, bs', z or "
                            "as, bs, z")

        def tr(p):
            if len(p) != 2:
                raise TypeError("wrong argument")
            return TupleArg(_prep_tuple(p[0]), _prep_tuple(p[1]))

        arg0, arg1 = tr(args[0]), tr(args[1])
        if Tuple(arg0, arg1).has(oo, zoo, -oo):
            raise ValueError("G-function parameters must be finite")
        if any((a - b).is_Integer and a - b > 0
               for a in arg0[0] for b in arg1[0]):
            raise ValueError("no parameter a1, ..., an may differ from "
                         "any b1, ..., bm by a positive integer")

        # TODO should we check convergence conditions?
        return Function.__new__(cls, arg0, arg1, args[2])