If you want your numbers in ascending order you can add them into a set and then sort the set into an ascending list.
s = set()
if number1 not in s:
s.add(number1)
if number2 not in s:
s.add(number2)
...
s = sorted(s) #Now a list in ascending order
If you want to have unique elements in your list, then why not use a set, if of course, order does not matter for you: -
>>> s = set()
>>> s.add(2)
>>> s.add(4)
>>> s.add(5)
>>> s.add(2)
>>> s
39: set([2, 4, 5])
If order is a matter of concern, then you can use: -
>>> def addUnique(l, num):
... if num not in l:
... l.append(num)
...
... return l
You can also find an OrderedSet
recipe, which is referred to in Python Documentation
You could probably use a set object instead. Just add
numbers to the set. They inherently do not replicate.
Source: Stackoverflow.com