Linewise iterate compressed file

[dreamflasher]

With gzip.open() the following is possible:

with gzip.open(filename, 'rb') as f:
    for line in f:

How do I achieve this with lz4tools?

lz4tools.open(filename).read()

fails with RecursionError: maximum recursion depth exceeded in comparison -- I assume because it tries to load everything into memory and doesn't return a generator?