Nick Mellor writes:
> Hi all,
>
> Seemingly simple problem:
>
> There is a case in my code where I know a dictionary has only one item
> in it. I want to get the value of that item, whatever the key is.
>
> In Python2 I'd write:
>
>>>> d = {"Wilf's Cafe": 1}
>>>> d.values()[0]
> 1
>
> and that'd be an end to it.
>
> In Python 3:
If you are happy to give the sole value a name:
>>> shoe = dict(it=math.pi)
>>> [o] = shoe.values()
>>> o
3.141592653589793
You might be able to use * to pass the sole value to a function:
>>> print(*shoe.values())
3.141592653589793
But the most readable thing might be to have a function that extracts
the sole value by whatever means:
>>> def sole(d): [o] = d.values() ; return o
...
>>> sole(shoe)
3.141592653589793
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