Python-сообщество

 import zipfile
with zipfile.ZipFile("archive.zip", mode="r") as archive:
    with zipfile.ZipFile("archive2.zip", mode="r") as archive2:
        text = archive2.read("document.txt")
        print(text) #FileNotFountError: [Errno 2] No such file or directory: 'archive2.zip'

 import io
import zipfile
with zipfile.ZipFile('archive.zip') as z:
    with z.open('archive2.zip') as z2:
        with zipfile.ZipFile(io.BytesIO(z2.read())) as nested_zip:
            text = nested_zip.open('document.txt').read()
            print(text)

 import io
import zipfile
import xml.etree.ElementTree as ET
with zipfile.ZipFile('archive.zip') as z:
    with z.open('archive2.zip') as z2:
        with zipfile.ZipFile(io.BytesIO(z2.read())) as nested_zip:
            tree = ET.parse(nested_zip.open("document.xml"))
            root = tree.getroot()

[guest@localhost subarch]$ ./subarch.py 
File text:
Привет!

End.
[guest@localhost subarch]$

 tree = ET.parse(nested_zip.open("document.xml"))
root = tree.getroot()

 root = ET.fromstring(nested_zip.open("document.xml").read())