Python Ternary Operator Without else

Question

Is it possible to do this on one line in Python?

if :
    myList.append(\'myString\')

I have tried the ternary operator:

Answer 1

if : myList.append('myString')

Otherwise, no. Why the need to put it on one line?

Note that the "ternary operator" is an operator. Like any operator, it must return something, so how can you have a ternary operator without the else clause? What is it supposed to return if the condition isn't true-like?