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From: Lele Gaifax <lele@metapensiero.it>
Subject: Re: Eval of expr with 'or' and 'and' within
Date: Sat, 15 Jun 2013 11:48:05 +0200
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Nick the Gr33k <support@superhost.gr> writes:

> On 15/6/2013 3:14 πμ, Cameron Simpson wrote:
>> But for what you are doing, "and" and "or" are not good operations.
>>
>> Something like:
>>
>>    "k" in (name+month+year)
>>
>> or
>>
>>    "k" in name or "k" in month or "k" in year
>
> Used to wrote it myself like the latter but needed a more compact way
> of writing it for clarity so i used the former.
>
> but those 2 gives the same results back
>
> "k" in (name+month+year) == "k" in (name and month and year)
> True
>
> so both seem to work as expected.

That happens only by chance: it seems you now understand the evaluation
of "boolean" expressions in Python, so the following should be clear to
you: 

>>> "k" in ("there" + "is" + "a" + "k" + "character" + "somewhere")
True
>>> "k" in ("there" and "is" and "a" and "k" and "character" and "somewhere")
False

ciao, lele.
-- 
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
lele@metapensiero.it  |                 -- Fortunato Depero, 1929.