把求生之路三方图拆分成两部分，一部分包含地图本体，另一部分包含材质，方便服务器、客户端两用。

splitmap.py

# 将地图文件拆分成两份（vtf 或 非 vtf）
# 地图文件需要提前解包并重命名
# 依赖工具：
# 1. https://github.com/ValvePython/vpk vpk 解包
# 2. Left 4 Dead 2 Authoring Tools vpk.exe 打包

from argparse import ArgumentParser
from pathlib import Path
from subprocess import run
from vpk import open as open_vpk

VPKEXE = "D:/SteamLibrary/steamapps/common/Left 4 Dead 2/bin/vpk.exe"


def parser():
    p = ArgumentParser("splitmap")
    p.add_argument("vpk", help="要拆分的vpk文件")
    return p


def main():
    args = parser().parse_args()
    src = Path(args.vpk)
    dest_texture = src.parent.joinpath(f"{src.stem}_textures")
    dest_base = src.parent.joinpath(f"{src.stem}_base")
    # 自动解包
    vpkfile = open_vpk(src)
    # 收集文件路径
    files_inside = [p for p in vpkfile]
    outpaths = []
    for p in files_inside:
        if p.endswith(".vtf"):
            outpaths.append(dest_texture.joinpath(p))
        else:
            outpaths.append(dest_base.joinpath(p))
    dirs2mk = list(set([p.parent for p in outpaths]))

    # 提前创建文件夹
    for dir_ in dirs2mk:
        dir_.mkdir(parents=True, exist_ok=True)
    # 写文件
    for filepath, outpath in zip(files_inside, outpaths):
        fileobj = vpkfile.get_file(filepath)
        content = fileobj.read()
        outpath.write_bytes(content)
        print(f"extract {filepath} -> {outpath}")

    input("完成手工作业后，按任意键继续...")

    a = run([VPKEXE, dest_base])
    b = run([VPKEXE, dest_texture])
    a.check_returncode()
    b.check_returncode()


if __name__ == "__main__":
    main()