Re: __contains__ vs. __getitem__

David Isaac wrote: Alan Isaac wrote: I have a subclass of dict where __getitem__ returns None rather than raising KeyError for missing keys. (The why of that is not important for this question.) Bruno Desthuilliers [EMAIL PROTECTED] wrote: Well, actually it may be important... What's so

Re: __contains__ vs. __getitem__

Bruno Desthuilliers [EMAIL PROTECTED] wrote: David Isaac wrote: Alan Isaac wrote: I have a subclass of dict where __getitem__ returns None rather than raising KeyError for missing keys. (The why of that is not important for this question.) Bruno Desthuilliers [EMAIL PROTECTED]

Re: __contains__ vs. __getitem__

Pedro Werneck [EMAIL PROTECTED] wrote: On Wed, 09 Aug 2006 16:51:23 GMT David Isaac [EMAIL PROTECTED] wrote: Looking forward: Can I count on this independence of __getitem__ and __contains__? I would like to understand whether it will be safe to count on this behavior. With the

__contains__ vs. __getitem__

I have a subclass of dict where __getitem__ returns None rather than raising KeyError for missing keys. (The why of that is not important for this question.) I was delighted to find that __contains__ still works as before after overriding __getitem__.So even though instance['key'] does not

Re: __contains__ vs. __getitem__

David Isaac wrote: I have a subclass of dict where __getitem__ returns None rather than raising KeyError for missing keys. (The why of that is not important for this question.) Well, actually it may be important... What's so wrong with d.get('key') that you need this behaviour ? --

Re: __contains__ vs. __getitem__

That's a vague question, so the obligatory it depends response applies here. If you want to guard against the unexpected, perhaps it's a good idea to write unit tests rather than to take someone's word that it *should* work okay every time, in every case, no matter what you're doing with the

Re: __contains__ vs. __getitem__

Alan Isaac wrote: I have a subclass of dict where __getitem__ returns None rather than raising KeyError for missing keys. (The why of that is not important for this question.) Bruno Desthuilliers [EMAIL PROTECTED] wrote: Well, actually it may be important... What's so wrong with

Re: __contains__ vs. __getitem__

On Wed, 09 Aug 2006 16:51:23 GMT David Isaac [EMAIL PROTECTED] wrote: Looking forward: Can I count on this independence of __getitem__ and __contains__? I would like to understand whether it will be safe to count on this behavior. With the builtin 'dict' implementation, dict.__contains__()