old_contents: import hashlib
  import os
  from tempfile import mkdtemp
  from time import time
  
  from prettyconf.configuration import Configuration
  
  config = Configuration()
  
  # Append epoch to prevent test runs from clobbering each other.
  CONTAINER_PREFIX = 'cloud-storage-test-' + str(int(time()))
  SECRET = hashlib.sha1(os.urandom(128)).hexdigest()
  SALT = hashlib.sha1(os.urandom(128)).hexdigest()
  
  TEXT_FILENAME = 'flask.txt'
  TEXT_STREAM_FILENAME = 'flask-stream.txt'
  TEXT_FORM_FILENAME = 'flask-form.txt'
  TEXT_MD5_CHECKSUM = '2a5a634f5c8d931350e83e41c9b3b0bb'
  
  BINARY_FILENAME = 'avatar.png'
  BINARY_FORM_FILENAME = 'avatar-form.png'
  BINARY_STREAM_FILENAME = 'avatar-stream.png'
  BINARY_MD5_CHECKSUM = '2f907a59924ad96b7478074ed96b05f0'
  
  BINARY_OPTIONS = {
      'meta_data': {
          'owner-id': 'da17c32d-21c2-4bfe-b083-e2e78187d868',
          'owner-email': 'user.one@startup.com'
      },
      'content_type': 'image/png',
      'content_disposition': 'attachment; filename=avatar-attachment.png',
  }
  
  AMAZON_KEY = config('AMAZON_KEY', default=None)
  AMAZON_SECRET = config('AMAZON_SECRET', default=None)
  AMAZON_REGION = config('AMAZON_REGION', default='us-east-1')
  
  GOOGLE_CREDENTIALS = config('GOOGLE_CREDENTIALS', default=None)
  
  RACKSPACE_KEY = os.getenv('RACKSPACE_KEY')
  RACKSPACE_SECRET = os.getenv('RACKSPACE_SECRET')
  RACKSPACE_REGION = os.getenv('RACKSPACE_REGION')
  # RACKSPACE_KEY = config('RACKSPACE_KEY', default=None)
  # RACKSPACE_SECRET = config('RACKSPACE_SECRET', default=None)
  # RACKSPACE_REGION = config('RACKSPACE_REGION', default='IAD')
  
  LOCAL_KEY = config('LOCAL_KEY', default=mkdtemp(prefix='cloud-storage-test-'))
  if not os.path.exists(LOCAL_KEY):
      os.makedirs(LOCAL_KEY)
  LOCAL_SECRET = config('LOCAL_SECRET', default='local-storage-secret')
  
new_contents: import hashlib
  import os
  from tempfile import mkdtemp
  from time import time
  
  from prettyconf.configuration import Configuration
  
  config = Configuration()
  
  # Append epoch to prevent test runs from clobbering each other.
  CONTAINER_PREFIX = 'cloud-storage-test-' + str(int(time()))
  SECRET = hashlib.sha1(os.urandom(128)).hexdigest()
  SALT = hashlib.sha1(os.urandom(128)).hexdigest()
  
  TEXT_FILENAME = 'flask.txt'
  TEXT_STREAM_FILENAME = 'flask-stream.txt'
  TEXT_FORM_FILENAME = 'flask-form.txt'
  TEXT_MD5_CHECKSUM = '2a5a634f5c8d931350e83e41c9b3b0bb'
  
  BINARY_FILENAME = 'avatar.png'
  BINARY_FORM_FILENAME = 'avatar-form.png'
  BINARY_STREAM_FILENAME = 'avatar-stream.png'
  BINARY_MD5_CHECKSUM = '2f907a59924ad96b7478074ed96b05f0'
  
  BINARY_OPTIONS = {
      'meta_data': {
          'owner-id': 'da17c32d-21c2-4bfe-b083-e2e78187d868',
          'owner-email': 'user.one@startup.com'
      },
      'content_type': 'image/png',
      'content_disposition': 'attachment; filename=avatar-attachment.png',
  }
  
  AMAZON_KEY = config('AMAZON_KEY', default=None)
  AMAZON_SECRET = config('AMAZON_SECRET', default=None)
  AMAZON_REGION = config('AMAZON_REGION', default='us-east-1')
  
  GOOGLE_CREDENTIALS = config('GOOGLE_CREDENTIALS', default=None)
  
  RACKSPACE_KEY = os.environ['RACKSPACE_KEY']
  RACKSPACE_SECRET = os.environ['RACKSPACE_SECRET']
  RACKSPACE_REGION = os.environ['RACKSPACE_REGION']
  # RACKSPACE_KEY = config('RACKSPACE_KEY', default=None)
  # RACKSPACE_SECRET = config('RACKSPACE_SECRET', default=None)
  # RACKSPACE_REGION = config('RACKSPACE_REGION', default='IAD')
  
  LOCAL_KEY = config('LOCAL_KEY', default=mkdtemp(prefix='cloud-storage-test-'))
  if not os.path.exists(LOCAL_KEY):
      os.makedirs(LOCAL_KEY)
  LOCAL_SECRET = config('LOCAL_SECRET', default='local-storage-secret')
  
subject: Test of os.getenv vs prettyconfig