simple UnZip

[oj]

On Jul 2, 2:39 pm, noydb <jenn.du... at gmail.com> wrote:
> Can someone help me with this script, which I found posted elsewhere?
> I'm trying to figure out what is going on here so that I can alter it
> for my needs, but the lack of descriptive names is making it
> difficult.  And, the script doesn't quite do anything worthwhile -- it
> unzips one file from a zipfile, not all files in a zipfile.
>
> ***
> import zipfile, os, sys, glob
>
> os.chdir("C:\\Temp")
> zips = glob.glob('*.zip')
>
> for fzip in zips:
>     if zipfile.is_zipfile(fzip):
>         print fzip," is a zip"
>         z = zipfile.ZipFile(fzip,'r')
>         lstName = z.namelist()
>         sHgt = lstName[0]
>         print "Unpacking",sHgt
>         hgt = z.read(sHgt)
>         fHgt = open(sHgt,'wb')
>         fHgt.write(hgt)
>         # fHgt.flush
>         fHgt.close
> print "Finished"
> ***
>
> I changed it somewhat to
> &&&
> import zipfile, os, sys
>
> event_zip = ("C:\\Temp\\data4event.zip")
>
> z = zipfile.ZipFile(event_zip, 'r')
>
> zList = z.namelist()
>
> for zItem in zList:
>     print "Unpacking",zItem
>     zRead = z.read(zItem)
>     z1File = open(zItem,'wb')
>     z1File.write(zRead)
>     z1File.close
> print "Finished"
> &&&
>
> This works, but I want to be able to specify a different output
> location.
>
> The scenario is that the zip file will always be the same (gets copied
> over daily), but it needs to be unzipped to a specific different
> directory.
>
> Can anyone help?
>
> Thanks!

Firstly, I'd recommend just reading the documentation for the zipfile
module, it's fairly straight forwards.

To write the files to a different location, just change this line:

     z1File = open(zItem,'wb')

This is where you're opening a file to write to.

Try something like:

    z1File = open( os.path.join(output_dir, zItem), 'wb')

to write the files into the path specified in output_dir.

You don't even have to save the files with the same names they have in
the zipfile; you don't have to save the files at all. In one project
I'm working on, I just read files from a zip file into memory and
process them there.