[Python-Dev] string.find() again (was Re: timsort for jython)

[Guido van Rossum]

> In testing this patch, I ran across this:
> 
> 	>>> 's' in 's'
> 	True
> 	>>> 's' in 's' == True
> 	False
> 	>>> 's' in 's' is True
> 	False
> 	>>> id('s' in 's')
> 	135246792
> 	>>> id(True)
> 	135246792
> 
> What's up with that?  Am I missing something?  

Yes, 'is' and'in' and '==' are all comparison operators, and the
chaining syntax makes this interpreted as (roughly)

    ('s' in 's') and ('s' == True)
    ('s' in 's') and ('s' is True)

--Guido van Rossum (home page: http://www.python.org/~guido/)