任何从字典中形成字典的pythonic方法，其中很少有键具有列表值？

Question

Example 1:

Items = {'key1': 1, 'key2': '[0,2,3,4]', 'key3': '[5,6,7,8]', 'key4': 9}

Expected output:

 {'key1':1, 'key2':2,'key3':0, 'key4':9}, {'key1':1, 'key2':0,'key3':5, 'key4':9}, ... ] 

Since first value of list in key2 is 0, We will not proceed in that case. Numbers of dictionaries generated should be 7.

Example 2:

Items = {'key1': 1, 'key2': '[0,2,0,0]', 'key3': '[5,6,7,8]', 'key4': 9}

Expected output:

 [{'key1':1, 'key2':2,'key3':0, 'key4':9}] 

Only 1 dictionary will be create

Answer 1

Here's a solution using for loops, where n refers to the length of the lists inside the Items dictionary:

Items = {'key1': 1, 'key2': [1,2,3,4], 'key3': [5,6,7,8], 'key4': 9}

out = []
n = 4
for i in range(n):
    d = {}
    for k in Items:
        if type(Items[k]) == int:
            d[k] = Items[k]
        elif type(Items[k]) == list:
            d[k] = Items[k][i]
    out.append(d)
print(out)

That code outputs the following:

[
    {'key2': 1, 'key3': 5, 'key1': 1, 'key4': 9},
    {'key2': 2, 'key3': 6, 'key1': 1, 'key4': 9},
    {'key2': 3, 'key3': 7, 'key1': 1, 'key4': 9},
    {'key2': 4, 'key3': 8, 'key1': 1, 'key4': 9}
]

Notice that I changed the values in the Items dict to be lists rather than string representations of lists.