len() should always return something
rhodri at wildebst.demon.co.uk
Fri Jul 24 16:11:40 CEST 2009
On Fri, 24 Jul 2009 14:57:02 +0100, Grant Edwards <invalid at invalid> wrote:
> On 2009-07-24, Dr. Phillip M. Feldman <pfeldman at verizon.net> wrote:
>> Some aspects of the Python design are remarkably clever, while
>> others leave me perplexed. Here's an example of the latter:
>> Why does len() give an error when applied to an int or float?
>> len() should always return something; in particular, when
>> applied to a scalar, it should return a value of 1.
> If len(7) returned a value of 1, then wouldn't one expect 7
> to be valid? It isn't, so you'd then have to redefine all
> types so that they are sequences that can be indexed. Sounds
> like a big mess to me...
> [Are there types for which len() returns a value that can't be
Which doesn't make your point less valid. In fact I'd go so
far as to argue that what len() gives you is the number of
items in a container, so len(7) should return 0.
Rhodri James *-* Wildebeest Herder to the Masses
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