```py
def all_unique(lst):
return len(lst) == len(set(lst))
```
```py
x = [1, 2, 3, 4, 5, 6]
y = [1, 2, 2, 3, 4, 5]
all_unique(x) # True
all_unique(y) # False
```
```py def all_unique(lst): return len(lst) == len(set(lst)) ``` ```py x = [1, 2, 3, 4, 5, 6] y = [1, 2, 2, 3, 4, 5] all_unique(x) # True all_unique(y) # False ```