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      1 """The asyncio package, tracking PEP 3156."""
      2 
      3 import sys
      4 
      5 # The selectors module is in the stdlib in Python 3.4 but not in 3.3.
      6 # Do this first, so the other submodules can use "from . import selectors".
      7 # Prefer asyncio/selectors.py over the stdlib one, as ours may be newer.
      8 try:
      9     from . import selectors
     10 except ImportError:
     11     import selectors  # Will also be exported.
     12 
     13 if sys.platform == 'win32':
     14     # Similar thing for _overlapped.
     15     try:
     16         from . import _overlapped
     17     except ImportError:
     18         import _overlapped  # Will also be exported.
     19 
     20 # This relies on each of the submodules having an __all__ variable.
     21 from .base_events import *
     22 from .coroutines import *
     23 from .events import *
     24 from .futures import *
     25 from .locks import *
     26 from .protocols import *
     27 from .queues import *
     28 from .streams import *
     29 from .subprocess import *
     30 from .tasks import *
     31 from .transports import *
     32 
     33 __all__ = (base_events.__all__ +
     34            coroutines.__all__ +
     35            events.__all__ +
     36            futures.__all__ +
     37            locks.__all__ +
     38            protocols.__all__ +
     39            queues.__all__ +
     40            streams.__all__ +
     41            subprocess.__all__ +
     42            tasks.__all__ +
     43            transports.__all__)
     44 
     45 if sys.platform == 'win32':  # pragma: no cover
     46     from .windows_events import *
     47     __all__ += windows_events.__all__
     48 else:
     49     from .unix_events import *  # pragma: no cover
     50     __all__ += unix_events.__all__
     51