[Python-Dev] NoneType(None) raises exception
jeanpierreda at gmail.com
Fri Apr 26 04:25:02 CEST 2013
On Thu, Apr 25, 2013 at 9:12 PM, MRAB <python at mrabarnett.plus.com> wrote:
>> Only when you write it out like that as constants. It's no more,
>> or less, strange than str('spam') or int(1) or list(). Why
>> would you do that?
> None is a singleton, but instances of str, int, list, etc aren't. Why
> can it take an argument when there's only ever one of them?
> That's why it seems strange to me.
How about bool? False and True are singletons much like None is, and
bool(False) == False; bool(True) == True.
Sure the distinction is that all of those are useful as conversion
functions, whereas NoneType would never be used that way.
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