Python-сообщество

m = [[[3, 4], [1, 2]], [[3, 4], [1, 2]], [[3, 4], [1, 2]], [[3, 4], [1, 2]], [[9, 8], [9, 0]]]
def function(f):
	for propertys in f:
		x = propertys
		
		if not isinstance(propertys, list):
			if x == 0:
				print x
				return x
		else:
			function(propertys)
		
for group in m:
	x = function(group)
	print x

function(propertys)

def flatten(nested):
    try:
        for sublist in nested:
            for element in flatten(sublist):
                yield element
    except TypeError:
        yield nested
l = [1, 2, 3, [1, 2], [45, 67, [56, 4]]]
for x in flatten(l):
    print x