Add python one-liner to flatten dict values in a list of dicts

@@ -222,3 +222,9 @@ from itertools import permutations; ["".join(p) for p in permutations(s)]

```

**Example:** `"abc" → ['abc', 'acb', 'bac', 'bca', 'cab', 'cba']`

## Flatten a list of dicts values into a single list

```python

[val for d in list_of_dicts for val in d.values()]

```

**Example:** `[{'a': 1}, {'b': 2}, {'c': 3}] → [1, 2, 3]`