Question

我有以下格式的列表：

[('car  crash  killed', 95), ('car  accident  crash', 86), ('disaster  police  car', 45)]

我想提取具有最大数字的字符串/句子并将其打印在文本文件中。在这种情况下，输出将是：

car crash killed

如果有两个或多个具有相同最大数字的字符串/句子，我想将它们全部提取出来。例如：

[('car  crash  killed', 95), ('car  accident  crash', 95), ('disaster  police  car', 45)]

输出：

car crash killed
car accident crash

如何提取？

Answer 1

使用max获得具有最大价值的物品：

lst = [('car  crash  killed', 95), ('car  accident  crash', 86), ('disaster  police  car', 45)]

print(max(lst, key=lambda x: x[1])[0])
# car  crash  killed

现在，要返回所有最大值项目，基本上应用相同的逻辑。获取max_value并使用如下列表理解返回带有max_value的所有项目：

lst = [('car  crash  killed', 95), ('car  accident  crash', 95), ('disaster  police  car', 45)]

max_value = max(lst, key=lambda x: x[1])[1]
print([x[0] for x in lst if x[1] == max_value])

# ['car  crash  killed', 'car  accident  crash']

Answer 2

from collections import Counter

dictionary = dict([('car  crash  killed', 95), ('car  accident  crash', 95), ('disaster  police  car', 45)])
counter = Counter(dictionary)
max_value = counter.most_common(1)[0][1]
print(max_value)

result = list(string for string, count in counter.most_common() if count == max_value)
print(result)

Answer 3

给出具有重复值的列表（96）：

case R.id.child2 :
    ImageView url = (ImageView) view;
    String urls;
    urls = cursor.getString(cursor.getColumnIndex(Database.DATABASE_CHILD_2));
    Glide.with(Nostrils.this).load(urls).apply(noTransformation()).into(url);
    url.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            AlertDialog.Builder mBuilder = new AlertDialog.Builder(Nostrils.this);
            View mView = getLayoutInflater().inflate(R.layout.dialog_custom_layout, null);
            PhotoView photoView = mView.findViewById(R.id.imageView);
            photoView.setImageDrawable(((ImageView)view).getDrawable());
            mBuilder.setView(mView);
            AlertDialog mDialog = mBuilder.create();
            mDialog.show();
        }
    });
    break;

然后按值对它进行排序，然后选择最高的值：

data = [('car  crash  killed', 95),
        ('car  accident  crash', 86),
        ('disaster  police  car', 45),
        ('road', 95)]

这可以通过列表理解来简化：

data = sorted([(y, x) for x, y in data], reverse=True)
out = []
highest = data[0][0]
for y, x in data:
    if y == highest:
        out.append(x)
print(out)

['road', 'car  crash  killed']

在列表（字符串，数字）中找到最大的python

3 个答案: