specifiers.py 文件源码

def _pad_version(left, right):
    left_split, right_split = [], []

    # Get the release segment of our versions
    left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
    right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))

    # Get the rest of our versions
    left_split.append(left[len(left_split[0]):])
    right_split.append(right[len(right_split[0]):])

    # Insert our padding
    left_split.insert(
        1,
        ["0"] * max(0, len(right_split[0]) - len(left_split[0])),
    )
    right_split.insert(
        1,
        ["0"] * max(0, len(left_split[0]) - len(right_split[0])),
    )

    return (
        list(itertools.chain(*left_split)),
        list(itertools.chain(*right_split)),
    )