Re: how to find not the next sibling but the 2nd sibling or findsibling a OR sinbling b
well actually all i want it to do is find the first thing that shows up
whether its class:food or class: drink so that works for me. only
thing is that after it finds class:food i think it runs through the
html again and finds the following class:drink and being that there is
not class tag after that class: drink tag it fails.
Fredrik Lundh wrote:
[EMAIL PROTECTED] wrote:
ok i found something that works. instead of using the def i did this:
for incident in row('div', {'class': 'food' or 'drink' }):
and it worked!
'food' or 'drink' doesn't do what you think it does:
'food' or 'drink'
'food'
{'class': 'food' or 'drink'}
{'class': 'food'}
/F
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Re: how to find not the next sibling but the 2nd sibling or findsibling a OR sinbling b
Brett Hoerner wrote:
[EMAIL PROTECTED] 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
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Holden Web LLC www.holdenweb.com
PyCon TX 2006 www.python.org/pycon/
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Re: how to find not the next sibling but the 2nd sibling or findsibling a OR sinbling b
[EMAIL PROTECTED] wrote: i actually realized there are 3 potentials for class names. either food or drink or dessert. so my question is whether or not i can alter your function to look like this? def isFoodOrDrinkOrDesert(attr): return attr in ['food', 'drink', 'desert'] what happens when you try that ? /F -- http://mail.python.org/mailman/listinfo/python-list
Re: how to find not the next sibling but the 2nd sibling or findsibling a OR sinbling b
[EMAIL PROTECTED] wrote:
ok i found something that works. instead of using the def i did this:
for incident in row('div', {'class': 'food' or 'drink' }):
and it worked!
'food' or 'drink' doesn't do what you think it does:
'food' or 'drink'
'food'
{'class': 'food' or 'drink'}
{'class': 'food'}
/F
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Re: how to find not the next sibling but the 2nd sibling or findsibling a OR sinbling b
hey fredrik,
i don't understand what you are saying
Fredrik Lundh wrote:
[EMAIL PROTECTED] wrote:
ok i found something that works. instead of using the def i did this:
for incident in row('div', {'class': 'food' or 'drink' }):
and it worked!
'food' or 'drink' doesn't do what you think it does:
'food' or 'drink'
'food'
{'class': 'food' or 'drink'}
{'class': 'food'}
/F
--
http://mail.python.org/mailman/listinfo/python-list
Re: how to find not the next sibling but the 2nd sibling or findsibling a OR sinbling b
[EMAIL PROTECTED] wrote:
hey fredrik,
i don't understand what you are saying
Do what he showed in the Python interactive shell,
Fredrik Lundh wrote:
'food' or 'drink' doesn't do what you think it does:
'food' or 'drink'
'food'
{'class': 'food' or 'drink'}
{'class': 'food'}
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.
http://diveintopython.org/power_of_introspection/and_or.html
Brett
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