My python skills are rusty on this one. 

I have a list of items. I want to create an id for them and build a dictionary.

example:

```
users = ["John","Peter","Alice"]

```

I want to create an outcome like

```
users_dict = {"u1":"John","u2":"Peter","u3":"Alice"}

```

I am having trouble figuring out how to create a for loop that will dynamically create u + integer. I may be dealing with a large qty of items in the list.

Any guidance would be appreciated.