I'm new to python, and I'm trying to use a time in a while statement.

```
while hours_left is greater than 0:00
{
    do some stuff
    decrement hours_left
}

```

is what I'm trying to achieve.

however I can't just say `hours_left > 0` because it's an int. 

any ideas how I can type `0:00` as datetime? 

Thanks!