Nick Mellor wrote:
> 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:
>
>>>> d = {"Wilf's Cafe": 1}
>>>> d.values()[0]
> Traceback (most recent call last):
> File "<input>", line 1, in <module>
> TypeError: 'dict_values' object does not support indexing
> "Wilf's Cafe"
>>>> d[list(d)[0]]
> 1
>
>>>> for k in d:
> ... value = d[k]
> ... break
> ...
>>>> value
> 1
>
>>>> list(d.values())[0]
> 1
>
> None of this feels like the "one, and preferably only one, obvious way to
> do it" we all strive for. Any other ideas?
If there is exactly one item you can unpack:
>>> d = {"Wilf's Cafe": 1}
>>> k, = d.values()
>>> k
1
--
https://mail.python.org/mailman/listinfo/python-list
