I am coding in python and ....

I have a quick question. I am trying to reset the values of a global array by calling a certain function but am having difficulty. Here is my code at the moment:

```
CHOICES = (('1', 'First'), ('2', 'Second'))

def set_choices():
    global CHOICES
    CHOICES = (('3', 'Third'), ('4', 'Fourth'))

```

Essentially what I want to do is reset the array CHOICES by calling the function from some other function. Is there a way to do that? 

Thanks!