title: badzipfile / shutil read error : this is not a zip file
body: <p>I am creating with Winrar an archive that contains a specific file.
  Then I modify the extension of the archive to .exe. ( for simulating having a packed installer)
  I wrote a python script to modify the extension .exe to .zip / .rar and now I want to extract it. but when I am using zipfile / shutil unpack, I am getting the error that this is not a zip file / badzipfile
  Do you know if there is a possibility to bypass this?</p>