[Tutor] slicing nested lists/dicts/tuples

[Brian van den Broek]

Luis N said unto the world upon 28/06/2005 15:25:
> Hi,
> 
> 
>>>>l
> 
> [{'last': 'Bar', 'first': 'Foo'}, {'last': 'Bar', 'first': 'Foo'}, {'last': 
> 'Bar', 'first': 'Foo'}, {'last': 'Bar', 'first': 'Foo'}]
> 
> 
> This is how I imagine it: 
> 
> for i in l:
> for j in l[i]:
> for k in l[i][j]:
> print k.get('first')
> print k.get('last')
> 
> Is there a short and sweet way of doing this (that actually works). 
> 
> Luis.

Hi Luis,

I'm not certain I see what you are wanting from your description. 
(You've got more nesting in your loops than in l.) But does this do 
what is wanted?

 >>> a_list = [ {'last': 'Bar', 'first': 'Foo'},
                {'last': 'Bar', 'first': 'Foo'},
                {'last': 'Bar', 'first': 'Foo'},
                {'last': 'Bar', 'first': 'Foo'} ]
 >>> for a_dict in a_list:
         print a_dict['first']
         print a_dict['last']

	
Foo
Bar
Foo
Bar
Foo
Bar
Foo
Bar
 >>>


If it does, why are you doing this? Is it to figure out how to 
manipulate data structures with Python? If so, good. If you are trying 
to do real work this way, there is surely a better way. Maybe if you 
said what you are trying to accomplish, someone could help you find a 
good way to do it.

Best,

Brian vdB