Python UnZipped - Listings in the Key of Zip (
Page 3 of 3 )
Finally were going to look at a function that uses recursion to move though a
Zip file and its sub archives; returning a complete list of all none Zip files.
But what’s the point in this? Let's say for instance that you want to count the
number of files in a Zip, this way all you have to do is call len() on our function.
Enough talk lets see this function in action.
<br />#!/usr/bin/env python</p>
<p> </p>
<p>import os, zipfile</p>
<p> </p>
<p>def rezipe(path, files = []):</p>
<p> </p>
<p>zip = zipfile.ZipFile(path)</p>
<p> </p>
<p>for name in zip.namelist():</p>
<p>if name.endswith('.zip'):</p>
<p>file(name, 'wb').write(zip.read(name))</p>
<p>rezipe(name)</p>
<p>os.remove(name)</p>
<p>elif not name.endswith('/'):</p>
<p>files.append(name)</p>
<p> </p>
<p>return files</p>
<p> </p>
<p>print len(rezipe('Python.zip'))
<br />
But wait, there's... uhm... nevermind. That's it. Sorry if I hyped that last
one up a bit.
Unlike our other examples rezipe() opens the Zip file itself instead of using
one we’ve already opened. It then loops though zip.namelist() and if name ends
with .zip we extract it to the current working directory and call rezipe() on
it, removing it when rezipe() is complete. The next part simply says if name isn’t
a Zip file or a folder append it to the end of our list.
If your anything like me by now I’m sure you can see the potential this little
guy (in particular) has and what this means for your Zip files!
If you’ve found this article interesting and you want to learn more about Python
or some of the subjects covered here:
http://www.python.org/ - Python homepage
http://www.python.org/doc/2.3.2/tut/tut.html - Python tutorial
http://www.python.org/doc/2.3.2/modindex.html - Python module index
http://www.python.org/doc/2.3.2/lib/module-zipfile.html - The zipfile module
Note: All the examples shown and discussed in this article where tested on Windows
XP with Python 2.3 and are meant only as examples.
