Re: Logic operators with in statement

Mr.SpOOn mr.spoo...@gmail.com wrote in message news:mailman.492.1258380560.2873.python-l...@python.org... In [13]: ('b3' and '5') in l or ('3' and 'b3') in l Out[13]: True For anything more than the simplest cases, you might want use sets. That might be the correct data type from the start,

Re: Logic operators with in statement

Thanks everybody for all the answers and explanations. In the end maybe it is simpler if I use sets for these tests. Thanks again. -- http://mail.python.org/mailman/listinfo/python-list

Logic operators with in statement

Hi, I'm trying to use logical operators (or, and) with the in statement, but I'm having some problems to understand their behavior. In [1]: l = ['3', 'no3', 'b3'] In [2]: '3' in l Out[2]: True In [3]: '3' and '4' in l Out[3]: False In [4]: '3' and 'no3' in l Out[4]: True This seems to work as

Re: Logic operators with in statement

Sorry for replying to myself, but I think I understood why I was wrong. The correct statement should be something like this: In [13]: ('b3' and '5') in l or ('3' and 'b3') in l Out[13]: True -- http://mail.python.org/mailman/listinfo/python-list

Re: Logic operators with in statement

On 02:02 pm, mr.spoo...@gmail.com wrote: Hi, I'm trying to use logical operators (or, and) with the in statement, but I'm having some problems to understand their behavior. and and or have no particular interaction with in. In [1]: l = ['3', 'no3', 'b3'] In [2]: '3' in l Out[2]: True In

Re: Logic operators with in statement

On Mon, Nov 16, 2009 at 6:02 AM, Mr.SpOOn mr.spoo...@gmail.com wrote: Hi, I'm trying to use logical operators (or, and) with the in statement, but I'm having some problems to understand their behavior. In [1]: l = ['3', 'no3', 'b3'] In [2]: '3' in l Out[2]: True In [3]: '3' and '4' in l

Re: Logic operators with in statement

On Tue, Nov 17, 2009 at 12:02 AM, Mr.SpOOn mr.spoo...@gmail.com wrote: Hi, I'm trying to use logical operators (or, and) with the in statement, but I'm having some problems to understand their behavior. Hey Carlo, I think your issue here is mistaking 'in' as a statement. It's just another

Re: Logic operators with in statement

On Mon, Nov 16, 2009 at 6:08 AM, Mr.SpOOn mr.spoo...@gmail.com wrote: Sorry for replying to myself, but I think I understood why I was wrong. The correct statement should be something like this: In [13]: ('b3' and '5') in l or ('3' and 'b3') in l Out[13]: True No, you've just run into

Re: Logic operators with in statement

On Tue, Nov 17, 2009 at 12:08 AM, Mr.SpOOn mr.spoo...@gmail.com wrote: Sorry for replying to myself, but I think I understood why I was wrong. The correct statement should be something like this: In [13]: ('b3' and '5') in l or ('3' and 'b3') in l Out[13]: True Carlo, I'm not sure what

Re: Logic operators with in statement

Here I expected to get True in the second case too, so clearly I don't really get how they work. You're seeing short-circuit evaluation: 3 or 4 # true '3' '4' or '3' # true '4' '4' in l# false False '3' or False # true '3' '4' or '42' in l # true: same as '4' or

Re: Logic operators with in statement

On Mon, Nov 16, 2009 at 6:23 AM, Xavier Ho cont...@xavierho.com wrote: snip '3' in l and 'no3' in l True AND operator has a higher precedence, so you don't need any brackets here, I think. But anyway, you have to use it like that. So that's something you'll have to fix first. Er, you mean

Re: Logic operators with in statement

On Tue, Nov 17, 2009 at 12:46 AM, Chris Rebert c...@rebertia.com wrote: On Mon, Nov 16, 2009 at 6:23 AM, Xavier Ho cont...@xavierho.com wrote: AND operator has a higher precedence, so you don't need any brackets here, I think. But anyway, you have to use it like that. So that's something