Remove a sublist if all the elements are 0

Question

I have this list

lst = [ [2,0,1], [0,0,0], [3,2,4], [0,0,0,0] ]

I'm looking for a way to remove those lists that only have numbers 0

So the expected output is:

lst = [ [2,0,1], [3,2,4] ]

Answer 1

Using list comprehension and any:

[l for l in lst if any(l)]

Answer 2

Try this list comprehension

[l for l in lst if not all(x == 0 for x in l)]