On 07/24/2018 01:07 PM, Chris Angelico wrote:
On Wed, Jul 25, 2018 at 5:33 AM, Tobiah <t...@tobiah.org> wrote:
Consider:
>>> type({}) is dict
True
>>> type(3) is int
True
>>> type(None) is None
False
Obvious I guess, since the type object is not None.
So what would I compare type(None) to?
>>> type(None)
<type 'NoneType'>
>>> type(None) is NoneType
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'NoneType' is not defined
I know I ask whether:
>>> thing is None
but I wanted a generic test.
I'm trying to get away from things like:
>>> type(thing) is type(None)
because of something I read somewhere preferring
my original test method.
There is nothing more generic in a type test than in simply saying "is
None". There are no other instances of NoneType. Don't try
type-checking None; just check if the object is None.
ChrisA
I suppose one valid usage would be this sort of thing:
fn = {
int: dispatchInt,
str: dispatchStr,
list: dispatchList,
type(None): dispatchNone
}[type(x)]
fn(x)
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Rob Gaddi, Highland Technology -- www.highlandtechnology.com
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