How is the logical processing being done for strings like 'Dog' and 'Cat'

zaarg georgeryoung at gmail.com
Tue Oct 21 04:41:33 CEST 2008


On Oct 20, 9:41 pm, Sumitava Mukherjee <sm... at cognobytes.com> wrote:
> Hi all,
> I am a novice programmer in Python.
> Please could you explain me the results (regarding logical operators).
>
> I get this:
>
> >>> print bool('God' and 'Devil')
>
> True
>
> [This is ok because (any) string is True,
Not quite so.  Be careful with this.  The empty string gets False:
print bool("") --> False
Any *non-empty* string gets True.

> so; (True and True) gives
> True]
>
> >>> print('God' and 'Devil')
>
> Devil
>
> [This is what I don't get ]
> and for that matter,I also checked out this:
>
> >>> 01 and 10
>
> 10
Note that AND is a boolean operator, not a bit operator.  If you want
to hack bits of an integer, use the "binary bitwise operators"
   http://docs.python.org/reference/expressions.html#binary-bitwise-operations
e.g.
>>> 01 & 10
0
>>> 01 | 10
11

>
> What is python doing when we type in ('God' and 'Devil') or key in (01
> and 10) ?




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