"Jojo Mwebaze" <jojo.mweb...@gmail.com> wrote

i would like to implement the following in lists

assuming

x = 3
y = 4
z = None

i want to create a dynamic list such that

mylist = [ x , y, z ] ,   if z in not None

if z is None then

mylist = [x,y]


Assuming you actually mean that you don;t want to include any item that is None you can use an if clause at the end of the comprehension:

mylist = [irtem for item in aList where item != None]

and aList is any list, which could be [x,y,z] in your example.

HTH,

--
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/

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