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Python – Dictionaries with Unique Value Lists

When it is required to get the dictionaries with unique value lists, the ‘set’ operator and the list methods are used, along with a simple iteration.

Example

Below is a demonstration of the same −

my_dictionary = [{'Python' : 11, 'is' : 22}, {'fun' : 11, 'to' : 33}, {'learn' : 22},{'object':9},{'oriented':11}]

print("The dictionary is : " )
print(my_dictionary)

my_result = list(set(value for element in my_dictionary for value in element.values()))

print("The resultant list is : ")
print(my_result)

print("The resultant list after sorting is : ")
my_result.sort()
print(my_result)

Output

The dictionary is :
[{'Python': 11, 'is': 22}, {'fun': 11, 'to': 33}, {'learn': 22}, {'object': 9}, {'oriented': 11}]
The resultant list is :
[33, 11, 22, 9]
The resultant list after sorting is :
[9, 11, 22, 33]

Explanation

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

  • The values in the dictionary are accessed by iterating over, and converted to a set.

  • This way, the unique elements are obtained.

  • It is then converted to a list, and assigned to a variable.

  • It is displayed as the output on the console.

  • It is again sorted and displayed on the console.