Python - Unique values count of each Key

When it is required to find unique values count of every key, an iteration along with the ‘append’ method is used.

Example

Below is a demonstration of the same

my_list = [12, 33, 33, 54, 84, 16, 16, 16, 58]

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

filtered_list = []

elem_count = 0

for item in my_list:
   if item not in filtered_list:
      elem_count += 1
      filtered_list.append(item)

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

Output

The list is :
[12, 33, 33, 54, 84, 16, 16, 16, 58]
The result is :
6

Explanation

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

• An empty list is defined,

• An integer is assigned to 0.

• The original list is iterated over.

• If an element present in the original list is not present in the second list, the integer is incremented by 1.

• The number is appended to the empty list.

• This is the output that is displayed on the console.