Re: [Tutor] List comprehension possible with condition statements?

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

Re: [Tutor] List comprehension possible with condition statements?

Jojo Mwebaze wrote: Hi There, 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] Anyhelp! cheers Jojo

Re: [Tutor] List comprehension possible with condition statements?

Jojo Mwebaze wrote: Hi There, 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] Anyhelp! cheers Jojo Are there any constraints on x

Re: [Tutor] List comprehension possible with condition statements?

Thanks to everyone, nice ideas! cheers On Wed, Mar 3, 2010 at 10:02 AM, Christian Witts cwi...@compuscan.co.zawrote: Jojo Mwebaze wrote: Hi There, 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

Re: [Tutor] List comprehension possible with condition statements?

Dave Angel wrote: Jojo Mwebaze wrote: Hi There, 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] Anyhelp! cheers Jojo Are there any

Re: [Tutor] List comprehension possible with condition statements?

On Wed, 3 Mar 2010 07:46:39 pm Alan Gauld wrote: mylist = [irtem for item in aList where item != None] Comparisons with None almost always should be one of: item is None item is not None The reason is that item is None is ONLY ever true if the item actually is the singleton object None

Re: [Tutor] List comprehension possible with condition statements?

On Thu, 4 Mar 2010 05:18:40 am Alan Gauld wrote: Steven D'Aprano st...@pearwood.info wrote Comparisons with None almost always should be one of: item is None item is not None Yes, but the reason I changed it (I originally had is not) is that != is a more general test for illustrating

Re: [Tutor] List comprehension possible with condition statements?

Steven D'Aprano st...@pearwood.info wrote List comps can include *any* comparison: [x+1 for x in data if (3*x+2)**2 100*x or x -5] Sure, but the wording suggested (maybe wrongly) that the OP was a real beginner and so the concept of an expression was likely to be foreign. Sticking with