how to find not the next sibling but the 2nd sibling or findsibling "a" OR sinbling "b"

[Steve Holden]

Brett Hoerner wrote:
> localpricemaps at gmail.com wrote:
[...]
> "or" returns the first true element, anything but False or None, I
> think... so 'food' (a string) is true, and always will return in that
> code.

Just in case newbies are reading: in Python several different values are 
considered false in the context of an "if" statement. These include

False		# Boolean False
0		# The integer zero
0.0		# Floating-point zero
(0+0j)		# Complex zero
None		# The None object
[]		# The empty list
()		# The empty tuple
{}		# The empty dictionary

This is mainly to allow the convenience of writing

     if thing:
         ...

However, one has to be careful that code that needs to treat None 
differently from [] uses explicit testing such as

     if thing is None:
         ...

You can also construct your own classes so their instances evaluate to 
True or False according to your needs.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
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