returning True, False or None

[Mick Krippendorf]

Steven Bethard wrote:
> I have lists containing values that are all either True, False or
> None, e.g.:
> 
>      [True,  None,  None,  False]
>      [None,  False, False, None ]
>      [False, True,  True,  True ]
>      etc.
> 
> For a given list:
> * If all values are None, the function should return None.
> * If at least one value is True, the function should return True.
> * Otherwise, the function should return False.

Try:

 >>> max(lst)

Mick.