---
title: Check if two iterables are permutations of each other
type: snippet
language: python
tags: [list]
cover: apples
dateModified: 2023-05-23 10:48:03 +0100
---

Check if two iterables are permutations of each other.

- Use `Counter` to verify that each element in both iterables appear an equal number of times.

```py
from collections import Counter

def is_perm(items0, items1):
  return len(items0) == len(items1) and Counter(items0) == Counter(items1)
```

```py
is_perm([1, 2, 3], [4, 1, 6]) # False
is_perm([1, 2], [2, 1]) # True

is_perm("dad", "add") # True
is_perm("snack", "track") # False
```