How to keep only the key-value-pair with the global max value over several dictionaries?

Input:

A= [{'A':0.4, 'B':0.8, 'C':1.0},
    {'A':0.5, 'B':0.9, 'C':0.0}]

Desired Output:

A=[{'C':1.0},{'A':0.5, 'B':0.9}]

Note: I wanna iterate through and keep only the key with the maximum value among same keys !! And list of dictionaries should be kept !

Solution

A more concise approach based on @Ioannis' answer

max_dict = {k: max([d[k] for d in A]) for k in A[0]}
result = [{k: v for k, v in i.items() if v == max_dict[k]} for i in A]
print(result)

output:

[{'C': 1.0}, {'A': 0.5, 'B': 0.9}]

Detailed approach:

You can create a dictionary with max values and check with it for each list item. You can implement it using 2 for loops.

A = [{'A': 0.4, 'B': 0.8, 'C': 1.0},
     {'A': 0.5, 'B': 0.9, 'C': 0.0}]

max_dict = {}

for a_dict in A:
    for key, value in a_dict.items():
        if key not in max_dict or max_dict[key] < value:
            max_dict[key] = value

result = []
for a_dict in A:
    temp_dict = {}
    for key, value in a_dict.items():
        if value == max_dict[key]:
            temp_dict[key] = value
    result.append(temp_dict)

print(result)

output:

[{'C': 1.0}, {'A': 0.5, 'B': 0.9}]