Python Syntax, value if else

Question

Saw this line in a Leetcode solution:

top_element = stack.pop() if stack else '#'

I understand what is happening, but what is the syntax called? Is this a ternary operator? Just want to understand to use it correctly.

Answer 1

It's officially called Conditional expression in python 3 documentation. Usually it's also called ternary operator, ternary conditional operator or something like that.