How to count the occurrences of all list items in list Python?

Question

I want to count the occurrences of all list items in a list. I did it with `count()` as below

```python
a = [1,2,2,2,4,5]

for i in a:
   print(a.count(i))
```
But it's taking so much time when the data is huge. Is there any other way to do this?

Divya · Accepted Answer

To count the occurrences of all items in a list, you can use `counter()` instead of a loop.

```python
from collections import Counter
 a = [1,2,3,4,1]
 print(Counter(a))
```
### Check Output [here](https://onecompiler.com/python/3w6zs254e)

1 Answer