intsranges.py 文件源码

def __call__(self, parser, namespace, value, option_string=None):
        pieces = value.split('-')
        if not (0 < len(pieces) <= 3):
            raise argparse.ArgumentError("wrong syntax in IntsRange with {}"
                                         .format(value))
        try:
            if len(pieces) == 1:
                self.result.append(int(pieces[0]))
            elif len(pieces) == 2:
                a, b = (int(x) for x in pieces)
                self.result += list(range(a, b+1))
            else:
                a, b, c = (int(x) for x in pieces)
                self.result += list(range(a, b+1, c))
            self.result = sorted(set(self.result))
        except ValueError as e:
            raise argparse.ArgumentTypeError(value, "IntsRange requires integers")
        setattr(namespace, self.dest, self.result)

#################### unit test