<a target="_blank" href="https://leetcode.com/problems/sort-characters-by-frequency/">https://leetcode.com/problems/sort-characters-by-frequency/</a>
<pre><code class="lang-python">class Solution:
 def frequencySort(self, s: str) -&gt; str:
 c = Counter(s)
 srted = {k : v for k, v in sorted(c.items(), key=lambda item: -1 * item[1])}
 return "".join(list(k * c[k] for k in srted))
</code></pre>

[https://leetcode.com/problems/sort-characters-by-frequency/](https://leetcode.com/problems/sort-characters-by-frequency/)

```python
class Solution:
    def frequencySort(self, s: str) -> str:
        c = Counter(s)
        srted = {k : v for k, v in sorted(c.items(), key=lambda item: -1 * item[1])}
        return  "".join(list(k * c[k] for k in srted))
```

Sort Characters By Frequency