old_contents: import asyncio
  from pyodbc import dataSources as _dataSources
  
  from .connection import connect, Connection
  from .pool import create_pool, Pool
  
  
  __version__ = '0.0.3'
  __all__ = ['connect', 'Connection', 'create_pool', 'Pool', 'dataSources']
  
  (connect, Connection, create_pool, Pool)  # pyflakes
  
  
  async def dataSources(loop=None, executor=None):
      """Returns a dictionary mapping available DSNs to their descriptions.
  
      :param loop: asyncio compatible event loop
      :param executor: instance of custom ThreadPoolExecutor, if not supplied
          default executor will be used
      :return dict: mapping of dsn to driver description
      """
      loop = loop or asyncio.get_event_loop()
      sources = await loop.run_in_executor(executor, _dataSources)
      return sources
  
new_contents: import asyncio
  from pyodbc import dataSources as _dataSources
  
  from .connection import connect, Connection
  from .pool import create_pool, Pool
  
  
  __version__ = '0.1.0a0'
  __all__ = ['connect', 'Connection', 'create_pool', 'Pool', 'dataSources']
  
  (connect, Connection, create_pool, Pool)  # pyflakes
  
  
  async def dataSources(loop=None, executor=None):
      """Returns a dictionary mapping available DSNs to their descriptions.
  
      :param loop: asyncio compatible event loop
      :param executor: instance of custom ThreadPoolExecutor, if not supplied
          default executor will be used
      :return dict: mapping of dsn to driver description
      """
      loop = loop or asyncio.get_event_loop()
      sources = await loop.run_in_executor(executor, _dataSources)
      return sources
  
subject: bump version to 0.1.0a0