Райтап на задачу «Учебная граната»

import io
import zipfile


def hidden_names(archive: zipfile.ZipFile) -> list[str]:
    return [name for name in archive.namelist() if name != "boom.zip"]


with open("bomb", "rb") as f:
    data = f.read()
names: list[str] = []
depth = 0
while True:
    archive = zipfile.ZipFile(io.BytesIO(data))
    names.extend(hidden_names(archive))
    if "boom.zip" not in archive.namelist():
        break
    data = archive.read("boom.zip")
    depth += 1
message = "".join(name[1:] if name.startswith(".") else name for name in names)

print(f"[+] nested archives: {depth}")
print(f"[+] hidden message ({len(message)} chars):")
print(message)