Append a null into a list in python

Question

If I have a list:

ex_list = [x,y,z]

but I want to have

[x, y, z, ]

How do I do it? I tried:

ex_list.append(None) 

but that doesn't work.

Answer 1

The concept of null does not exist in Python. The closest related idea would be None, which can be appended just as you indicated:

ex_list.append(None)

which would result in

[x, y, z, None]