How can I do to check if a list of lists is empty?

Question

I have this list :

a = [[], [], []]

and that one :

b = [[], [2], []]

I would like to check if a and b are empty. I mean for me a is empty and b is not. How can I do that ?

Thank you very much !

Answer 1

You could check for "empty" using not any

>>> not any(a)
True
>>> not any(b)
False

Answer 2

Using any:

>>> any([[], [], []])
False
>>> any([[], [2], []])
True