如何修改Python代码从嵌套字典提取指定Read键的值并返回有序列表

原代码问题梳理 #

• 未定义入参，无法接收嵌套字典overlaps和指定键名两个输入
• 错误使用列表索引/切片语法访问字典，字典不支持[0]、[1:]这类操作
• 用全局set存储结果会自动去重，不符合需求，且缺少排序逻辑
• 遍历逻辑完全偏离需求，没有正确取其他Read子字典中对应指定键的数值

修改后实现代码 #

def get_left_overlaps(overlaps, target_read):
    res = []
    # 遍历所有外层的Read键
    for read_name, sub_dict in overlaps.items():
        # 跳过和目标键名相同的项
        if read_name == target_read:
            continue
        # 取当前Read子字典中对应目标键的数值，加入结果列表
        res.append(sub_dict[target_read])
    # 对结果升序排序后返回
    res.sort()
    return res

测试验证 #

用你提供的overlaps字典测试调用：

overlaps = {'Read1': {'Read3': 0, 'Read2': 1, 'Read5': 1, 'Read4': 0, 'Read6': 29}, 
'Read3': {'Read1': 0, 'Read2': 0, 'Read5': 0, 'Read4': 1, 'Read6': 1}, 
'Read2': {'Read1': 13, 'Read3': 1, 'Read5': 21, 'Read4': 0, 'Read6': 0}, 
'Read5': {'Read1': 39, 'Read3': 0, 'Read2': 1, 'Read4': 0, 'Read6': 14}, 
'Read4': {'Read1': 1, 'Read3': 1, 'Read2': 17, 'Read5': 2,'Read6': 0},
'Read6': {'Read1': 0, 'Read3': 43, 'Read2': 0, 'Read5': 0, 'Read4': 1}}

print(get_left_overlaps(overlaps, 'Read1'))

输出结果和预期一致：[0, 0, 1, 13, 39]

内容的提问来源于stack exchange，提问作者Lilly001