Re: Data Tree urgent help!!!!!!

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From	Peter Otten <__peter__@web.de>
Subject	Re: Data Tree urgent help!!!!!!
Date	Tue, 19 Feb 2013 13:34:40 +0100
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anadionisio257@gmail.com wrote:

> Hello!
> I have this lists with information and I need to make a "tree" by
> associating the information inside the lists. For example:
> 
> l1 = [apple, pear]
> l2 = [dog, cat]
> l3 = [fork, spoon]
> 
> And I need to make something like this:
> 
> l4 = [apple, dog, fork]
> l5 = [apple, dog, spoon]
> l6= [apple, cat, fork]
> l7 = [apple, cat, spoon]
> l8 = [pear, dog, fork]
> etc...
> 
> How can I do this? I could use "for" cycles and "if...else" but with
> larger lists it gets complicated
> 
> Is there some simple solution that I can use?

Try itertools.product():

>>> class Name(str):
...     def __repr__(self):
...             return self
... 
>>> apple, pear, dog, cat, fork, spoon = map(Name, "apple pear dog cat fork 
spoon".split())
>>> fruit = [apple, pear]
>>> pets = [dog, cat]
>>> cutlery = [fork, spoon]
>>> from itertools import product
>>> for item in product(fruit, pets, cutlery):
...     print item
... 
(apple, dog, fork)
(apple, dog, spoon)
(apple, cat, fork)
(apple, cat, spoon)
(pear, dog, fork)
(pear, dog, spoon)
(pear, cat, fork)
(pear, cat, spoon)

Thread

Data Tree urgent help!!!!!! anadionisio257@gmail.com - 2013-02-19 04:14 -0800
  Re: Data Tree urgent help!!!!!! Peter Otten <__peter__@web.de> - 2013-02-19 13:34 +0100
    Re: Data Tree urgent help!!!!!! Ana Dionísio <anadionisio257@gmail.com> - 2013-02-19 04:50 -0800
    Re: Data Tree urgent help!!!!!! Ana Dionísio <anadionisio257@gmail.com> - 2013-02-19 04:50 -0800
    Re: Data Tree urgent help!!!!!! Leo Breebaart <leo@lspace.org> - 2013-02-20 10:18 +0000
      Re: Data Tree urgent help!!!!!! Peter Otten <__peter__@web.de> - 2013-02-20 11:46 +0100
      Re: Data Tree urgent help!!!!!! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-02-20 22:01 +1100
        Re: Data Tree urgent help!!!!!! Chris Angelico <rosuav@gmail.com> - 2013-02-20 22:16 +1100
          Re: Data Tree urgent help!!!!!! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-02-20 22:47 +1100

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