Callback argument • Return a placeholder (Future, Promise, Deferred) • Deliver to a queue • Callback registry (e.g. POSIX signals) Regardless of which type of interface is used, asynchronous functions by definition this in native coroutines. – can support integration with other packages including Twisted via a registry of conversion functions. To access this functionality in native coroutines, use tornado.gen.convert_yielded a standalone module in tornado.autoreload. The two can be used in combination to provide extra robustness against syntax errors: set autoreload=True within the app to detect changes while it is running

Callback argument • Return a placeholder (Future, Promise, Deferred) • Deliver to a queue • Callback registry (e.g. POSIX signals) Regardless of which type of interface is used, asynchronous functions by definition this in native coroutines. – can support integration with other packages including Twisted via a registry of conversion functions. To access this functionality in native coroutines, use tornado.gen.convert_yielded a standalone module in tornado.autoreload. The two can be used in combination to provide extra robustness against syntax errors: set autoreload=True within the app to detect changes while it is running

Callback argument • Return a placeholder (Future, Promise, Deferred) • Deliver to a queue • Callback registry (e.g. POSIX signals) Regardless of which type of interface is used, asynchronous functions by definition this in native coroutines. – can support integration with other packages including Twisted via a registry of conversion functions. To access this functionality in native coroutines, use tornado.gen.convert_yielded a standalone module in tornado.autoreload. The two can be used in combination to provide extra robustness against syntax errors: set autoreload=True within the app to detect changes while it is running

Callback argument • Return a placeholder (Future, Promise, Deferred) • Deliver to a queue • Callback registry (e.g. POSIX signals) Regardless of which type of interface is used, asynchronous functions by definition this in native coroutines. – can support integration with other packages including Twisted via a registry of conversion functions. To access this functionality in native coroutines, use tornado.gen.convert_yielded a standalone module in tornado.autoreload. The two can be used in combination to provide extra robustness against syntax errors: set autoreload=True within the app to detect changes while it is running

Callback argument • Return a placeholder (Future, Promise, Deferred) • Deliver to a queue • Callback registry (e.g. POSIX signals) Regardless of which type of interface is used, asynchronous functions by definition this in native coroutines. – can support integration with other packages including Twisted via a registry of conversion functions. To access this functionality in native coroutines, use tornado.gen.convert_yielded a standalone module in tornado.autoreload. The two can be used in combination to provide extra robustness against syntax errors: set autoreload=True within the app to detect changes while it is running

Callback argument • Return a placeholder (Future, Promise, Deferred) • Deliver to a queue • Callback registry (e.g. POSIX signals) Regardless of which type of interface is used, asynchronous functions by definition this in native coroutines. – can support integration with other packages including Twisted via a registry of conversion functions. To access this functionality in native coroutines, use tornado.gen.convert_yielded a standalone module in tornado.autoreload. The two can be used in combination to provide extra robustness against syntax errors: set autoreload=True within the app to detect changes while it is running

Callback argument • Return a placeholder (Future, Promise, Deferred) • Deliver to a queue • Callback registry (e.g. POSIX signals) Regardless of which type of interface is used, asynchronous functions by definition this in native coroutines. – can support integration with other packages including Twisted via a registry of conversion functions. To access this functionality in native coroutines, use tornado.gen.convert_yielded a standalone module in tornado.autoreload. The two can be used in combination to provide extra robustness against syntax errors: set autoreload=True within the app to detect changes while it is running

Callback argument Return a placeholder (Future, Promise, Deferred) Deliver to a queue Callback registry (e.g. POSIX signals) Regardless of which type of interface is used, asynchronous functions by definition do this in native coroutines. can support integration with other packages including Twisted via a registry of conversion functions. To access this functionality in native coroutines, use tornado.gen.convert_yielded a standalone module in tornado.autoreload. The two can be used in combination to provide extra robustness against syntax errors: set autoreload=True within the app to detect changes while it is running

Callback argument Return a placeholder (Future, Promise, Deferred) Deliver to a queue Callback registry (e.g. POSIX signals) Regardless of which type of interface is used, asynchronous functions by definition do this in native coroutines. can support integration with other packages including Twisted via a registry of conversion functions. To access this functionality in native coroutines, use tornado.gen.convert_yielded a standalone module in tornado.autoreload. The two can be used in combination to provide extra robustness against syntax errors: set autoreload=True within the app to detect changes while it is running

Callback argument Return a placeholder (Future, Promise, Deferred) Deliver to a queue Callback registry (e.g. POSIX signals) Regardless of which type of interface is used, asynchronous functions by definition do this in native coroutines. can support integration with other packages including Twisted via a registry of conversion functions. To access this functionality in native coroutines, use tornado.gen.convert_yielded a standalone module in tornado.autoreload. The two can be used in combination to provide extra robustness against syntax errors: set autoreload=True within the app to detect changes while it is running