. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 6.5 Coroutines and concurrency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 6.6 Integration are almost as simple as synchronous code, but without the expense of a thread. They also make concurrency easier to reason about by reducing the number of places where a context switch can happen. Example: coroutines: – are generally faster. – can use async for and async with statements which make some patterns much simpler. – do not run at all unless you await or yield them. Decorated coroutines can start

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 6.5 Coroutines and concurrency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 6.6 Integration are almost as simple as synchronous code, but without the expense of a thread. They also make concurrency easier to reason about by reducing the number of places where a context switch can happen. Example: coroutines: – are generally faster. – can use async for and async with statements which make some patterns much simpler. – do not run at all unless you await or yield them. Decorated coroutines can start

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 6.5 Coroutines and concurrency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 6.6 Integration are almost as simple as synchronous code, but without the expense of a thread. They also make concurrency easier to reason about by reducing the number of places where a context switch can happen. Example: coroutines: – are generally faster. – can use async for and async with statements which make some patterns much simpler. – do not run at all unless you await or yield them. Decorated coroutines can start

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 6.5 Coroutines and concurrency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 6.6 Integration are almost as simple as synchronous code, but without the expense of a thread. They also make concurrency easier to reason about by reducing the number of places where a context switch can happen. Example: coroutines: – are generally faster. – can use async for and async with statements which make some patterns much simpler. – do not run at all unless you await or yield them. Decorated coroutines can start

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 6.5 Coroutines and concurrency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 6.6 Integration are almost as simple as synchronous code, but without the expense of a thread. They also make concurrency easier to reason about by reducing the number of places where a context switch can happen. Example: coroutines: – are generally faster. – can use async for and async with statements which make some patterns much simpler. – do not run at all unless you await or yield them. Decorated coroutines can start

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 6.5 Coroutines and concurrency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 6.6 Integration are almost as simple as synchronous code, but without the expense of a thread. They also make concurrency easier to reason about by reducing the number of places where a context switch can happen. Example: coroutines: – are generally faster. – can use async for and async with statements which make some patterns much simpler. – do not run at all unless you await or yield them. Decorated coroutines can start

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 6.5 Coroutines and concurrency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 6.6 Integration are almost as simple as synchronous code, but without the expense of a thread. They also make concurrency easier to reason about by reducing the number of places where a context switch can happen. Example: coroutines: – are generally faster. – can use async for and async with statements which make some patterns much simpler. – do not run at all unless you await or yield them. Decorated coroutines can start

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 6.5 Coroutines and concurrency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 6.6 Integration are almost as simple as synchronous code, but without the expense of a thread. They also make concurrency easier to reason about by reducing the number of places where a context switch can happen. Example: coroutines: – are generally faster. – can use async for and async with statements which make some patterns much simpler. – do not run at all unless you await or yield them. Decorated coroutines can start

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 5.5 Coroutines and concurrency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 5.6 Integration are almost as simple as synchronous code, but without the expense of a thread. They also make concurrency easier to reason about by reducing the number of places where a context switch can happen. Example: generally faster. • Native coroutines can use async for and async with statements which make some patterns much simpler. • Native coroutines do not run at all unless you await or yield them. Decorated coroutines

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 4.5 Coroutines and concurrency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 4.6 Integration are almost as simple as synchronous code, but without the expense of a thread. They also make concurrency easier to reason about by reducing the number of places where a context switch can happen. Example: we must wrap the # call in a lambda. IOLoop.current().run_sync(lambda: divide(1, 0)) Coroutine patterns Interaction with callbacks To interact with asynchronous code that uses callbacks instead of Future