How do I check if a list is empty?

Question

For example, if passed the following: a = []How do I check to see if `a` is empty?

Answer 1

Even simpler in Python:

if !a:

# This is executed if the list is empty

else:

# This is executed if the list is not empty

Answer 2

The simplest way would be to check the length of the list. An empty list has a length of 0.