Question

我正在编写“老虎机”代码，并且不能在if语句中使用列表中多个项，因此可以为不同的项组合设置单独的语句。

尝试使用如果rand_items中的“ item1”和“ item2”：要么如果rand_items中的“ item1”和“ item1”：但它实际上只能拾取其中一个

public class PolarLineDemo extends ApplicationFrame {
    public PolarLineDemo(String title) {
        super(title);
        final XYDataset dataset = getXYDataset();
        final JFreeChart chart = createChart(dataset);
        final ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 500));
        setContentPane(chartPanel);
    }

    private XYDataset getXYDataset() {
        XYSeriesCollection dataset = new XYSeriesCollection();
        XYSeries series1 = new XYSeries("Series 1");
        series1.add(20, 45);
        series1.add(145, 120);
        series1.add(90, 150);
        dataset.addSeries(series1);
        return dataset;
    }

    private JFreeChart createChart(final XYDataset dataset) {
        JFreeChart chart = ChartFactory.createPolarChart("Polar Line Chart",dataset,true,true,false);
        PolarPlot plot = (PolarPlot)chart.getPlot();
        DefaultPolarItemRenderer renderer = (DefaultPolarItemRenderer) plot.getRenderer();
        NumberAxis rangeAxis = (NumberAxis) plot.getAxis();

        //set gridlines for category
        plot.setAngleGridlinesVisible(true);
        plot.setAngleLabelsVisible(true);
        //set gridlines for series
        plot.setRadiusGridlinesVisible(true);
        plot.setRadiusMinorGridlinesVisible(false);

        //series range setter
        rangeAxis.setRange(0, 240.0);
        //series label visible
        rangeAxis.setTickLabelsVisible(true);
        rangeAxis.setTickUnit(new NumberTickUnit(40.0));

        //Marker shape visible
        renderer.setShapesVisible(true);
        //set marker shape, line color and width
        Shape triangle = ShapeUtilities.createDownTriangle(5);
        renderer.setSeriesShape(0, triangle, true);
        renderer.setSeriesStroke(0, new BasicStroke(2));
        //show series item labels -- This is not working.
        renderer.setSeriesItemLabelsVisible(0, true);
        return chart;
    }

    public static void main(String[] args) {
        PolarLineDemo polarLineDemo = new PolarLineDemo("Polar Line Chart");
        polarLineDemo.setSize(500, 500);
        RefineryUtilities.centerFrameOnScreen(polarLineDemo);
        polarLineDemo.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        polarLineDemo.setVisible(true);
    }
}

应该带两个物品，如果是钻石和炸弹，请继续，或者如果有两个（超过1个）钻石“给”钱。

Answer 1

您需要先检查"bomb"和"diamond"是否都在选项中，然后才能检查炸弹。我还建议使用set.issubset instead of multiple conditions in the if. Also making项a set`在这里也更有意义。

from random import choices

items = ["diamond", "bomb", "apple"]
rand_items = set(choices(items, k=3))

if {"bomb", "diamond"} <= rand_items:
    print("You may spin again.")
elif "bomb" in rand_items:
    print ("Game over.")
elif "diamond" in rand_items:
    print("You won £25.")

您将需要一个else，因为如果随机选择全部为"apple"

，则什么也不会发生

Answer 2

请注意，此语法不正确：

elif "bomb" and "diamond" in rand_items:

正确的编写方式是：

elif "bomb" in rand_items and "diamond" in rand_items:

...其他条件相同。现在，要检查某项是否在列表中两次，可以将其计数：

elif rand_items.count("diamond") == 2:

在if语句中包括1个以上随机生成的项目

2 个答案: