Randomly nested list generator in Python

randomly-nested-sequence.py

from random import randint

def sequence(length=3, depth=0, max_depth=2):
    for i in range(1,length):
        if randint(0,1) and depth <= max_depth:
            yield list(sequence(3, depth+1))
        else:
            yield randint(1,9)

if __name__ = "__main__":
    print(list(sequence()))