foos = [{'bar': [{'baz': 1}, {'baz': 2}]}, {'bar': [{'baz': 3}, {'baz': 4}]
    }, {'bar': [{'baz': 5}, {'baz': 6}]}]
for x in foos:
    for y in x:
        for i in range(len(x[y])):
            for z in x[y][i]:
                pass
Python: How to use a list comprehension here?