old_contents: import os
  import io
  from ConfigParser import ConfigParser as Config
  
  _CFG_FILE = os.path.join(os.path.dirname(__file__), '..', '..', 'conf', 'sarcoma.cfg')
  
  def sarcoma_location(sbj_id):
      return sarcoma_config().get('Tumor Location', sbj_id)
  
  def sarcoma_config():
      if not hasattr(sarcoma_config, 'instance'):
          sarcoma_config.instance = Config()
          sarcoma_config.instance.read(_CFG_FILE)
      return sarcoma_config.instance
  
new_contents: import os
  import io
  from ConfigParser import ConfigParser as Config
  
  _CFG_FILE = os.path.join(os.path.dirname(__file__), '..', '..', 'conf', 'sarcoma.cfg')
  
  def sarcoma_location(subject):
      """
      @param subject: the XNAT Subject ID
      @return: the subject tumor location
      """
  
      return sarcoma_config().get('Tumor Location', subject)
  
  def sarcoma_config():
      """
      @return: the sarcoma configuration
      @rtype: ConfigParser
      """
      
      if not hasattr(sarcoma_config, 'instance'):
          sarcoma_config.instance = Config()
          sarcoma_config.instance.read(_CFG_FILE)
      
      return sarcoma_config.instance
  
subject: Add method doc.