值显示为列表时的字典值比较答案

【问题标题】：Dictionary value comparison when values appears as a list值显示为列表时的字典值比较
【发布时间】：2019-09-09 06:40:32
【问题描述】：

我有两个字典，其中值是不同长度的列表，需要比较两个字典的值。作为回报，需要查看 dict1 中的任何列表是否与 dict2 值匹配并打印相应 dict 的键。还可以找到该特定值列表中的不匹配值打印它们

我尝试了多种方法，但得到了这个错误

ValueError：解包的值太多（预计 2 个）

dict1={'apple':[1,2,3,4],'banana':[2,4,7,8],'orange':[5,6,2,4,7]}
dict2={'1':[2,4,7,8,9,3],'2':[5,6,2,4,7,1],'4':[2,3,4,5,6]}

for keys,values in dict1:
    for keys,values in dict2:
        dict1[values]==dict2[values]

结果：对于 dict2，它将选择键并从列表中选择不匹配的值

{'1':[1,7,8,9]}

【问题讨论】：

标签： python-3.x dictionary

【解决方案1】：

如果您想使用键和值对 dict 进行迭代，请使用 dict.items()。它返回dict_items（元组列表），其中包括(key, value)

然后你可以解压它们并在你的 for 循环中使用。

for key1, val1 in dict1.items():
    for key2, val2 in dict2.items():
        if val1 == val2:
            # now write your required code here
            print('Matched key1 {} key2 {}'.format(key1, key2))

【讨论】：

【解决方案2】：

试试这个

dict1={'apple':[1,2,3,4],'banana':[2,4,7,8],'orange':[5,6,2,4,7]}
dict2={'1':[2,4,7,8,9,3],'2':[5,6,2,4,7,1],'4':[1,2,3,4]}

for key1, val1 in dict1.items():
    for key2, val2 in dict2.items():
        print("Matching {}:{} and {}:{}".format(key1, val1, key2, val2))
        diff = list(set(val1).symmetric_difference(val2))
        if len(diff) != 0:
            print("Differences found {}:{}\n".format(key2, diff))
        else:
            print("The two lists matched\n")

输出

Matching orange:[5, 6, 2, 4, 7] and 1:[2, 4, 7, 8, 9, 3]
Differences found 1:[3, 5, 6, 8, 9]

Matching orange:[5, 6, 2, 4, 7] and 2:[5, 6, 2, 4, 7, 1]
Differences found 2:[1]

Matching orange:[5, 6, 2, 4, 7] and 4:[1, 2, 3, 4]
Differences found 4:[1, 3, 5, 6, 7]

Matching apple:[1, 2, 3, 4] and 1:[2, 4, 7, 8, 9, 3]
Differences found 1:[1, 7, 8, 9]

Matching apple:[1, 2, 3, 4] and 2:[5, 6, 2, 4, 7, 1]
Differences found 2:[3, 5, 6, 7]

Matching apple:[1, 2, 3, 4] and 4:[1, 2, 3, 4]
The two lists matched

Matching banana:[2, 4, 7, 8] and 1:[2, 4, 7, 8, 9, 3]
Differences found 1:[3, 9]

Matching banana:[2, 4, 7, 8] and 2:[5, 6, 2, 4, 7, 1]
Differences found 2:[1, 5, 6, 8]

Matching banana:[2, 4, 7, 8] and 4:[1, 2, 3, 4]
Differences found 4:[1, 3, 7, 8]

我已更新列表以生成匹配列表的案例，它与此案例 Matching apple:[1, 2, 3, 4] and 4:[1, 2, 3, 4] 匹配。

【讨论】：

让我试试这个