unpack-npm.py

from os import walk
import os, errno
import subprocess

sevenzip="7z.exe"
src="C:/Downloads/UnzippedRPMDirectory"
dir = os.getcwd()

files = []
for (dirpath, dirname, filenames) in walk(src):
    files.extend(filenames)

rpms = []
for file in files:
    crumbs = os.path.splitext(file)
    if crumbs[-1] == ".rpm":
        if not os.path.exists(crumbs[0]):
            os.makedirs(crumbs[0])
        os.chdir(crumbs[0])
        sys = subprocess.Popen([sevenzip, "e", "-y", os.path.join(src, file)])
        sys.communicate()
        cpio = crumbs[0] + ".cpio"
        if os.path.exists(cpio):
            sys = subprocess.Popen([sevenzip, "e", "-y", cpio])
            sys.communicate()
        os.chdir(dir)