Message287265
| Author |
Eric Lafontaine |
| Recipients |
Eric Lafontaine, christian.heimes, docs@python, ezio.melotti, mark.dickinson, nparikh, vstinner |
| Date |
2017年02月08日.00:40:40 |
| SpamBayes Score |
-1.0 |
| Marked as misclassified |
Yes |
| Message-id |
<1486514441.04.0.909139698314.issue16011@psf.upfronthosting.co.za> |
| In-reply-to |
| Content |
Hi,
For user-defined class, it's up to the class to do the right implementation in my opinion. It's true the description is wrong though.
x in y means that x exist inside of y (so that the execution of y.__contain__(x) is executed successfully and (I guess) doesn't return None,False or 0).
I'll modify the doc to be :
For user-defined classes which define the __contains__() method, x in y is false if y.__contains__(x) is returning either None,False or 0. Otherwise, x in y return true.
Regards,
Eric Lafontaine |
|