Unzip files and return a list of the extracted files in Python

unzip_file_method.py

def unzip_file(self, path):
  '''
    Using a file path, unzip the file in to a directory of files returning a list of files in that folder
    :param path, a string representing the location of the zip file (path/to/zip.zip)
    :rtype list of files in decompressed folder
  '''
  import os
  import zipfile
  folder, ext = os.path.splitext(path)
  if not os.path.exists(folder):
    os.makedirs(folder)
  zip_ref = zipfile.ZipFile(path, 'r')
  zip_ref.extractall(folder)
  zip_ref.close()
  return [
    '{}/{}'.format(folder, f)
    for f in os.listdir(folder)
    if os.path.isfile(os.path.join(folder, f))
  ]