old_contents: #!/usr/bin/env python
  import urllib, zipfile, os, os.path
  urllib.urlretrieve('http://nlp.stanford.edu/sentiment/trainDevTestTrees_PTB.zip', 'trainDevTestTrees_PTB.zip')
  zf = zipfile.ZipFile('trainDevTestTrees_PTB.zip')
  for name in zf.namelist():
    (dirname, filename) = os.path.split(name)
    if not filename == '':
      zf.extract(name, ".")
  
new_contents: #!/usr/bin/env python
  import urllib, zipfile, os, os.path
  
  urllib.urlretrieve('http://nlp.stanford.edu/sentiment/trainDevTestTrees_PTB.zip', 'trainDevTestTrees_PTB.zip')
  zf = zipfile.ZipFile('trainDevTestTrees_PTB.zip')
  for name in zf.namelist():
      (dirname, filename) = os.path.split(name)
      if not filename == '':
          zf.extract(name, '.')
  
subject: Fix format