On Dec 13, 11:37 am, mattia <[email protected]> wrote:
> How can I insert non-duplicate data in a list? I mean, is there a
> particular option in the creation of a list that permit me not to use
> something like:
> def append_unique(l, val):
> if val not in l:
> l.append(val)
>
> Thanks,
> Mattia
You could also define a custom object that manages a custom ordered
set
class unique_set(object):
def __init__(self,list):
self.list = list
def __add___(self,val):
if val not in self.list
self.list.append(val)
return True
return False
>>> unique_list = unique_set(['a','b','c'])
>>> unique_list.list
['a', 'b', 'c']
>>> unique_list + 'd'
True
>>> unique_list + 'e'
True
>>> unique_list + 'd'
False
>>> unique_list.list
['a', 'b', 'c', 'd', 'e']
>>>
I've used this on a few projects, it makes for wonderfully clean code,
because you can look at your program as an overview without all the
arithmetic behind it.
hope it helps
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