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The Twisted Way - Ashwini Oruganti @_ashfall_ PyCon Ireland 2013
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Twisted asynchronous event-driven networking framework
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Twisted asynchronous event-driven networking framework aka... HARD
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The Need Twisted Reality: The Game Threads and Java The sadness
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The Beginning select() asyncore and Medusa …
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The Beginning Medusa: Unmaintained and direct socket manipulation …
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The Beginning … Twisted
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Programming Models Single-threaded Multi-threaded Asynchronous
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Single-threaded time
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Single-threaded
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Multi-threaded time
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Multi-threaded
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Event-driven time
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Event-driven
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The Reactor Waits on and handles events abstracts away platform- specific behavior
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Event-loop while True: timeout = time_until_next_timed_event() events = wait_for_events(timeout) events += timed_events_until(now()) for event in events: event.process()
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“Twisted softens your brains and makes you feel like your head is actually a blender optimized for gray gloop.”
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“It was created by a couple of dudes who dropped out of school, and a 16-year-old. HOW HARD COULD IT BE?”
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The Box Metaphor
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“How do I even get this thing to do anything?”
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When you look for it, there is nothing to see. When you listen for it, there is nothing to hear. When you use it, it is inexhaustible.
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from twisted.internet import reactor reactor.run() The World’s Largest NOP
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“The Master does his job and then stops. He understands that the universe is forever out of control.”
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It’s humongous!
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“Core can fit into a floppy disk.”
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It’s just code.
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Know what you're doing.
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No content
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