# count frequency with lambda

`count` function can be used in map to count a frequency 

Also to use `*` operator in exchange for `list()`

```
>>> a='1122345'
>>> list(map(a.count, '1234567'))
[2, 2, 1, 1, 1, 0, 0]

list(map(a.count, (1,2,3,4,6,7)))
[2, 2, 1, 1, 0, 0]

a=(1,1,2,2,3,4,5)
[*map(a.count, (1,2,3,4,5,6,7))]
```

### Using Collections.Count

```
>>> a='1122345'
>>> import collections
>>> collections.Counter(a)
Counter({'1': 2, '2': 2, '3': 1, '4': 1, '5': 1})
```