python - 如何按2个整数排序

Question

我尝试了很多选项来尝试正确排序，但没有成功。使用这段代码意味着将完全排序的列表输出到 winlist.txt 上，但它仅按第一个整数排序，因此无法正确排序。

def sort():
        winfile = list()
        with open ('winners.txt') as fin:
                for line in fin:
                        winfile.append(line.strip('\n'))
        winfile.sort()
        with open('SortWin.txt', 'w+') as fout:
                for winfile in winfile:
                        fout.write(winfile + '\n')

目前这段代码输出:

11 Tom
2 Tom
20 Ben
20 Tom
21 Ben

但我希望排序使用 2 个整数而不是仅第一个整数进行排序。这样 2 就会高于 11

Answer 1

尝试使用key参数:

def sort():
    winfile = list()
    with open ('winners.txt') as fin:
            for line in fin:
                    winfile.append(line.strip('\n'))
    winfile.sort(key=lambda x: int(x.split()[0]))
    with open('SortWin.txt', 'w+') as fout:
            for winfile in winfile:
                    fout.write(winfile + '\n')