Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/aiosignal/__init__.py: 53%

1from frozenlist import FrozenList 

2 

3__version__ = "1.3.1" 

4 

5__all__ = ("Signal",) 

6 

7 

8class Signal(FrozenList): 

9 """Coroutine-based signal implementation. 

10 

11 To connect a callback to a signal, use any list method. 

12 

13 Signals are fired using the send() coroutine, which takes named 

14 arguments. 

15 """ 

16 

17 __slots__ = ("_owner",) 

18 

19 def __init__(self, owner): 

20 super().__init__() 

21 self._owner = owner 

22 

23 def __repr__(self): 

24 return "<Signal owner={}, frozen={}, {!r}>".format( 

25 self._owner, self.frozen, list(self) 

26 ) 

27 

28 async def send(self, *args, **kwargs): 

29 """ 

30 Sends data to all registered receivers. 

31 """ 

32 if not self.frozen: 

33 raise RuntimeError("Cannot send non-frozen signal.") 

34 

35 for receiver in self: 

36 await receiver(*args, **kwargs) # type: ignore