Will McGugan's get_line_offsets challenge

get_line_offsets.py

def adam_get_line_offsets(text: str) -> list[int]:
    offsets = [0]
    n = 0
    text_index = text.index
    offsets_append = offsets.append
    while True:
        try:
            n = text_index('\n', n) + 1
        except ValueError:
            break
        offsets_append(n)
    offsets.pop()
    return offsets