I'm using Python 3.7. I have an array of dicts, each array having the same keys. For example

```
arr_of_dicts = ({"st" : "il"}, {"st" : "IL"}, {"st" : "Il"})

```

How do I apply the same function to a certain key's value in each dict? For example, I would like to apply the uppercase function to the value making the above

```
arr_of_dicts = ({"st" : "IL"}, {"st" : "IL"}, {"st" : "IL"})

```

?