How can I append a None value to a list in Python?

Question

I have a list :

A = ['Yes']

I want to have

A = ['Yes',None]

How can I do this?

Answer 1

Just use append:

A.append(None)

>>> print A
['Yes', None]

Answer 2

Simple:

A.append(None)

or

A += [None]

or

A.extend([None])

or

A[len(A):] = [None]