There are several ways to check if the list is empty or not in python. I frequently use the if statement either with not operator or without. Here is an example.
# An empty list
list_A = []
if not list_A:
print("List list_A is empty\n")
# Now fill the list
list_A = ["a", "b", 1, 2, "e", "f"]
if list_A:
print("List list_A:", list_A)
Reference
- More about lists in python at Python Docs.