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 as argparse [https://docs.python.org/3.6/library/argparse.html#module-argparse] is that a global registry is used so that options may be defined in any module (it also enables tornado.log by default). The

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 as argparse [https://docs.python.org/3.6/library/argparse.html#module-argparse] is that a global registry is used so that options may be defined in any module (it also enables tornado.log by default). The

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 inspired by Google’s gflags. The primary difference with libraries such as argparse is that a global registry is used so that options may be defined in any module (it also enables tornado.log by default). The

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 coroutines. • Decorated 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 inspired by Google’s gflags. The primary difference with libraries such as argparse is that a global registry is used so that options may be defined in any module (it also enables tornado.log by default). The

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 inspired by Google’s gflags. The primary difference with libraries such as argparse is that a global registry is used so that options may be defined in any module (it also enables tornado.log by default). The

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 inspired by Google’s gflags. The primary difference with libraries such as argparse is that a global registry is used so that options may be defined in any module (it also enables tornado.log by default). The

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 inspired by Google’s gflags. The primary difference with libraries such as argparse is that a global registry is used so that options may be defined in any module (it also enables tornado.log by default). The

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 inspired by Google’s gflags. The primary difference with libraries such as argparse is that a global registry is used so that options may be defined in any module (it also enables tornado.log by default). The

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 inspired by Google’s gflags. The primary difference with libraries such as argparse is that a global registry is used so that options may be defined in any module (it also enables tornado.log by default). The

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 inspired by Google’s gflags. The primary difference with libraries such as argparse is that a global registry is used so that options may be defined in any module (it also enables tornado.log by default). The