old_contents: # -*- coding: utf-8 -*-
  
  """Connection configuration for PyBEL."""
  
  import configparser
  import json
  import logging
  import os
  
  from .version import VERSION
  
  __all__ = [
      'config',
      'connection',
      'PYBEL_MINIMUM_IMPORT_VERSION',
  ]
  
  logger = logging.getLogger(__name__)
  
  #: The last PyBEL version where the graph data definition changed
  PYBEL_MINIMUM_IMPORT_VERSION = 0, 13, 0
  
  config = {}
  
  PYBEL_CACHE_DIRECTORY = 'PYBEL_CACHE_DIRECTORY'
  DEFAULT_CACHE_DIRECTORY = os.path.join(os.path.expanduser('~'), '.pybel')
  #: The default directory where PyBEL files, including logs and the  default cache, are stored. Created if not exists.
  CACHE_DIRECTORY = os.environ.get(PYBEL_CACHE_DIRECTORY, DEFAULT_CACHE_DIRECTORY)
  
  DEFAULT_CACHE_NAME = 'pybel_{}.{}.{}_cache.db'.format(*PYBEL_MINIMUM_IMPORT_VERSION)
  DEFAULT_CACHE_PATH = os.path.join(CACHE_DIRECTORY, DEFAULT_CACHE_NAME)
  #: The default cache connection string uses sqlite.
  DEFAULT_CACHE_CONNECTION = 'sqlite:///' + DEFAULT_CACHE_PATH
  
  CONFIG_FILE_PATHS = [
      os.path.join(os.path.expanduser('~'), '.config', 'pybel.ini'),
      os.path.join(os.path.expanduser('~'), '.config', 'pybel.cfg'),
      os.path.join(os.path.expanduser('~'), '.config', 'pybel', 'pybel.ini'),
      os.path.join(os.path.expanduser('~'), '.config', 'pybel', 'pybel.cfg'),
      os.path.join(os.path.expanduser('~'), '.config', 'pybel', 'config.ini'),
  ]
  config_parser = configparser.ConfigParser()
  config_parser.read(CONFIG_FILE_PATHS)
  if 'pybel' in config_parser:
      config.update(config_parser['pybel'])
  if VERSION.endswith('-dev') and 'pybel-dev' in config_parser:
      config.update(config_parser['pybel-dev'])
  
  #: The environment variable that contains the default SQL connection information for the PyBEL cache
  PYBEL_CONNECTION = 'PYBEL_CONNECTION'
  
  if PYBEL_CONNECTION in os.environ:
      connection = os.environ[PYBEL_CONNECTION]
      logger.info('got environment-defined connection: %s', connection)
  elif 'connection' in config:
      connection = config['connection']
      logger.info('getting configured connection: %s', connection)
  else:  # This means that there will have to be a cache directory created
      os.makedirs(CACHE_DIRECTORY, exist_ok=True)
      connection = DEFAULT_CACHE_CONNECTION
      logger.info('no configuration found, using default sqlite connection %s', connection)
  
new_contents: # -*- coding: utf-8 -*-
  
  """Connection configuration for PyBEL."""
  
  import configparser
  import json
  import logging
  import os
  
  from .version import VERSION
  
  __all__ = [
      'config',
      'connection',
      'PYBEL_MINIMUM_IMPORT_VERSION',
  ]
  
  logger = logging.getLogger(__name__)
  
  #: The last PyBEL version where the graph data definition changed
  PYBEL_MINIMUM_IMPORT_VERSION = 0, 14, 0
  
  config = {}
  
  PYBEL_CACHE_DIRECTORY = 'PYBEL_CACHE_DIRECTORY'
  DEFAULT_CACHE_DIRECTORY = os.path.join(os.path.expanduser('~'), '.pybel')
  #: The default directory where PyBEL files, including logs and the  default cache, are stored. Created if not exists.
  CACHE_DIRECTORY = os.environ.get(PYBEL_CACHE_DIRECTORY, DEFAULT_CACHE_DIRECTORY)
  
  DEFAULT_CACHE_NAME = 'pybel_{}.{}.{}_cache.db'.format(*PYBEL_MINIMUM_IMPORT_VERSION)
  DEFAULT_CACHE_PATH = os.path.join(CACHE_DIRECTORY, DEFAULT_CACHE_NAME)
  #: The default cache connection string uses sqlite.
  DEFAULT_CACHE_CONNECTION = 'sqlite:///' + DEFAULT_CACHE_PATH
  
  CONFIG_FILE_PATHS = [
      os.path.join(os.path.expanduser('~'), '.config', 'pybel.ini'),
      os.path.join(os.path.expanduser('~'), '.config', 'pybel.cfg'),
      os.path.join(os.path.expanduser('~'), '.config', 'pybel', 'pybel.ini'),
      os.path.join(os.path.expanduser('~'), '.config', 'pybel', 'pybel.cfg'),
      os.path.join(os.path.expanduser('~'), '.config', 'pybel', 'config.ini'),
  ]
  config_parser = configparser.ConfigParser()
  config_parser.read(CONFIG_FILE_PATHS)
  if 'pybel' in config_parser:
      config.update(config_parser['pybel'])
  if VERSION.endswith('-dev') and 'pybel-dev' in config_parser:
      config.update(config_parser['pybel-dev'])
  
  #: The environment variable that contains the default SQL connection information for the PyBEL cache
  PYBEL_CONNECTION = 'PYBEL_CONNECTION'
  
  if PYBEL_CONNECTION in os.environ:
      connection = os.environ[PYBEL_CONNECTION]
      logger.info('got environment-defined connection: %s', connection)
  elif 'connection' in config:
      connection = config['connection']
      logger.info('getting configured connection: %s', connection)
  else:  # This means that there will have to be a cache directory created
      os.makedirs(CACHE_DIRECTORY, exist_ok=True)
      connection = DEFAULT_CACHE_CONNECTION
      logger.info('no configuration found, using default sqlite connection %s', connection)
  
subject: Update minimum import version