Message287265
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 |
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Date |
User |
Action |
Args |
2017-02-08 00:40:41 | Eric Lafontaine | set | recipients:
+ Eric Lafontaine, mark.dickinson, vstinner, christian.heimes, ezio.melotti, docs@python, nparikh |
2017-02-08 00:40:41 | Eric Lafontaine | set | messageid: <1486514441.04.0.909139698314.issue16011@psf.upfronthosting.co.za> |
2017-02-08 00:40:41 | Eric Lafontaine | link | issue16011 messages |
2017-02-08 00:40:40 | Eric Lafontaine | create | |
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