code: def unzip(source_file, destination_dir):
      
      with zipfile.ZipFile(source_file) as zf:
          zf.extractall(destination_dir)
docs: Unzips <source_file> into <destination_dir>.
      :param str|unicode source_file: The name of the file to read
      :param str|unicode destination_dir: The name of the directory to write the unzipped files