Joel Hedlund wrote:
>>This does *not* also mean constants and such:
>
> <snip>
>
>> >>> a = 123456789
>> >>> a == 123456789
>> True
>> >>> a is 123456789
>> False
>
> I didn't mean that kind of constant. I meant named constants with defined
> meaning, as in the example that I cooked up in my post. More examples:
> os.R_OK,
> or more complex ones like mymodule.DEFAULT_CONNECTION_CLASS.
If it weren't for the current CPython optimization (caching small
integers) this code which it appears you would support writing, would fail:
if (flags & os.R_OK) is os.R_OK:
# do something
while this, on the other hand, is not buggy, because it correctly uses
equality comparison when identity comparison is not called for:
if (flags & os.R_OK) == os.R_OK:
# do something
(I think you should give it up... you're trying to push a rope.)
-Peter
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