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# ``twisted`.`internet`.`interfaces`.`IReactorFromThreads``

interface documentation

`class IReactorFromThreads(Interface): (source)`

Known subclasses: `twisted.internet.interfaces.IReactorThreads`

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This interface is the set of thread-safe methods which may be invoked on the reactor from other threads.

Present Since
15.4

Method | `callFromThread` | Cause a function to be executed by the reactor thread.

def callFromThread(callable: `Callable[..., Any]`, *args: `object`, **kwargs: `object`): (source)

Cause a function to be executed by the reactor thread.

Use this method when you want to run a function in the reactor's thread from another thread. Calling `callFromThread` should wake up the main thread (where `reactor.run()` is executing) and run the given callable in that thread.

If you're writing a multi-threaded application the `callable` may need to be thread safe, but this method doesn't require it as such. If you want to call a function in the next mainloop iteration, but you're in the same thread, use `callLater` with a delay of 0.