Count the number of unique elements in a list python

- Count the number of elements in a list python
- Count the number of same elements in a list python
- Count the number of certain elements in a list python
- Count the total number of elements in a list python
- Count unique elements in a list python
- Count the number of repeated elements in list python
- Count number of different elements in a list python
- Count number of elements in list python with condition
- List count
- Напишите программу которая считывает три числа и подсчитывает сумму только положительных чисел