How to use the lz4.compress function in lz4

for modname, func in [("pylz4", pylz4.compress), ("rustlz4", rustlz4.compress)]:
        timer = timeit.Timer(functools.partial(func, data))
        elapsed = timer.timeit(number=number)
        perf = size * number / elapsed / 1e6
        name = "%s.%s" % (modname, func.__name__)
        print("%24s: %8.2f MB/s" % (name, perf))

    for modname, func in [("pylz4", pylz4.compressHC), ("rustlz4", rustlz4.compresshc)]:
        timer = timeit.Timer(functools.partial(func, hcdata))
        elapsed = timer.timeit(number=number)
        perf = size * number / elapsed / 1e6
        name = "%s.%s" % (modname, func.__name__)
        print("%24s: %8.2f MB/s" % (name, perf))

    data = pylz4.compress(data)
    for modname, func in [("pylz4", pylz4.decompress), ("rustlz4", rustlz4.decompress)]:
        timer = timeit.Timer(functools.partial(func, data))
        elapsed = timer.timeit(number=number)
        perf = size * number / elapsed / 1e6
        name = "%s.%s" % (modname, func.__name__)
        print("%24s: %8.2f MB/s" % (name, perf))

def __init__(self, img, angle):
        self.img_buf = lz4.compress(img)
        self.img_shape = img.shape
        self.angle = angle

def process_document(self, session, doc):
        data = doc.get_raw(session)
        new = lz4.compress(data)
        return StringDocument(new, self.id, doc.processHistory,
                              parent=doc.parent, filename=doc.filename)

def save(self, fname):
        with open(fname, 'w') as f:
            f.write(lz4.compress(pickle.dumps(self)))