old_contents: """
  Global configuration variables for accessing the Echo Nest web API.
  """
  
  ECHO_NEST_API_KEY = None
  
  __version__ = "$Revision: 0 $"
  # $Source$
  
  import os
  
  if(os.environ['ECHO_NEST_API_KEY']):
      ECHO_NEST_API_KEY = os.environ['ECHO_NEST_API_KEY']
  else:
      ECHO_NEST_API_KEY = None
  
  
  API_HOST = 'developer.echonest.com'
  API_SELECTOR = '/api/'
  "Locations for the Analyze API calls."
  
  HTTP_USER_AGENT = 'PyENAPI'
  """
  You may change this to be a user agent string of your
  own choosing.
  """
  
  MP3_BITRATE = 192
  """
  Default bitrate for MP3 output. Conventionally an
  integer divisible by 32kbits/sec.
  """
  
  CACHE = True
  """
  You may change this to False to prevent local caching
  of API results.
  """
  OBEY_RATE_LIMIT = True
  """
  The Echo Nest limits users to 120 api calls per minute.
  By default, pyechonest enforces this limit locally. Set this
  variable to False to turn of local enforcement. The Echo Nest
  api will still throttle you.
  """
new_contents: """
  Global configuration variables for accessing the Echo Nest web API.
  """
  
  ECHO_NEST_API_KEY = None
  
  __version__ = "$Revision: 0 $"
  # $Source$
  
  import os
  
  if('ECHO_NEST_API_KEY' in os.environ):
      ECHO_NEST_API_KEY = os.environ['ECHO_NEST_API_KEY']
  else:
      ECHO_NEST_API_KEY = None
  
  
  API_HOST = 'developer.echonest.com'
  API_SELECTOR = '/api/'
  "Locations for the Analyze API calls."
  
  HTTP_USER_AGENT = 'PyENAPI'
  """
  You may change this to be a user agent string of your
  own choosing.
  """
  
  MP3_BITRATE = 192
  """
  Default bitrate for MP3 output. Conventionally an
  integer divisible by 32kbits/sec.
  """
  
  CACHE = True
  """
  You may change this to False to prevent local caching
  of API results.
  """
  OBEY_RATE_LIMIT = True
  """
  The Echo Nest limits users to 120 api calls per minute.
  By default, pyechonest enforces this limit locally. Set this
  variable to False to turn of local enforcement. The Echo Nest
  api will still throttle you.
  """
  
subject: check if key even exists before going into os.environ