Merge multiple zip files into a single zip file in Python

Question

I have multiple zip files that have the same structure -- they contain XML files at the root level. All files in each zip file are unique (no duplicates across the zip files). I

Answer 1

Here's what I came up with, thanks to @mac. Note that the way this is currently implemented the first zip file is modified to contain all the files from the other zip files.

import zipfile as z

zips = ['z1.zip', 'z2.zip', 'z3.zip']

"""
Open the first zip file as append and then read all
subsequent zip files and append to the first one
"""
with z.ZipFile(zips[0], 'a') as z1:
    for fname in zips[1:]:
        zf = z.ZipFile(fname, 'r')
        for n in zf.namelist():
            z1.writestr(n, zf.open(n).read())