Why is dictionary.keys() a list and not a set?
"Martin v. Löwis"
martin at v.loewis.de
Thu Nov 24 23:32:30 CET 2005
Christoph Zwerschke wrote:
> Sorry. Your answer was good; I missed the point and thought you wrote
> set(d.keys()). Is it documented anywhere that set(d) = set(d.keys())? I
> think this should go into the Python Doco where keys() are explained.
It follows from what is documented. set(<iterable object>) creates a
set that contains all elements in the iterable object:
Now, is a dictionary an iterable object? Yes, it is:
Together, this gives the property I demonstrated.
Unfortunately, the PEP apparently hasn't made it into the
More information about the Python-list