How can I add Nothing to a list?

Question

Is there a way to append a blank item to a list? I don't want to append the value None, but really nothing.

Ex.

>>> a = [1,2,3,4]

>>> a.append(None)

>>> a

#what I would like to happen

[1,2,3,4]

#what happens

[1,2,3,4,None]

Answer 1

Use sum instead of append and sum the empty list [] in case.

Comments

Can you explain further?

---

>>> a = [1,2,3,4]

>>> b  = []

>>> a + b

[1, 2, 3, 4]

Keep in mind that "+" and .append() are not always interchangeable

---

+ and append are radically different

+ creates a new list

append changes the initial list

+= changes the initial list

Answer 2

just do NOT append anything

Answer 3

have you thought about a try exception and just don't append if appending None