Python program to get maximum of each key Dictionary List

When it is required to get the maximum of each key in a list of dictionary elements, a simple iteration is used.

Example

Below is a demonstration of the same

my_list = [{"Hi": 18, "there": 13, "Will": 89},
   {"Hi": 53, "there": 190, "Will": 87}]

print("The list is : ")
print(my_list)

my_result = {}
for elem in my_list:
   for key, val in elem.items():
      if key in my_result:
         my_result[key] = max(my_result[key], val)
      else:
         my_result[key] = val

print("The result is : ")
print(my_result)

Output

The list is :
[{'Will': 89, 'there': 13, 'Hi': 18}, {'Will': 87, 'there': 190, 'Hi': 53}]
The result is :
{'Will': 89, 'there': 190, 'Hi': 53}

Explanation

• A list of dictionary is defined and is displayed on the console.

• An empty dictionary is defined.

• The list is iterated over, and the elements are accessed.

• If the key is present in the previously defined dictionary, the maximum of the key and the value is determined, and stored in the ‘key’ index of the dictionary.

• Otherwise, the value is stored in the ‘key’ index of the dictionary.

• This is displayed as the output on the console.