[1,2,3] exactly same as [1,2,3,] ?

[Terry Reedy]

mh at pixar.com wrote:
> x=[1,2,3]
> and
> x=[1,2,3,]
> 
> are exactly the same, right?

Yes, so you can write something like either your second example or

l = [
   kjasldfjs,
   kjsalfj,
   ksjdflasj,
]

and insert items without worrying about leaving out the comma (less of a 
problem with 'horizontal' list), or delete the last line and not have to 
worry about deleting the comma on the line before.