Chunks to Lines in Python 2.7

chunks2lines.py

def ChunksToLines(reader):
    history = []
    for chunk in reader:
        lines = chunk.splitlines()
        if chunk[-1] == '\n':
            lines.append('')
        elif len(lines) == 1:
            history.append(lines[0])
            continue
        history.append(lines[0])
        yield "".join(history)
        for line in lines[1:-1]:
            yield line
        history = lines[-1:]
    line = "".join(history)
    if len(line) > 0:
        yield line

# Test it with
for line in ChunksToLines(["abc\n", "\ncdb", "f\nzz", "\n", "avvvv", "b\nc"]): print line
for line in ChunksToLines(['\r\n1\r\n\r\n']): print line