. . . . . . . . . . . . . . . . . . . . . . . . . 29 6 Mathematical Operations and Elementary Functions 30 6.1 Arithmetic Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Annotated Strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 9 Functions 72 9.1 Argument Passing Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Keyword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 9.4 Operators Are Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 9.5 Operators With Special Names

. . . . . . . . . . . . . . . . . . . . . . . . . 29 6 Mathematical Operations and Elementary Functions 30 6.1 Arithmetic Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Annotated Strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 9 Functions 72 9.1 Argument Passing Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Keyword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 9.4 Operators Are Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 9.5 Operators With Special Names

. . . . . . . . . . . . . . . . . . . . . . . . . 29 6 Mathematical Operations and Elementary Functions 30 6.1 Arithmetic Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Annotated Strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 9 Functions 72 9.1 Argument Passing Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Keyword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 9.4 Operators Are Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 9.5 Operators With Special Names

You can also use IOLoop.run_in_executor to asynchronously run a blocking function on another thread, but note that the function passed to run_in_executor should avoid referencing any Tornado objects. run_in_executor 1 Blocking A function blocks when it waits for something to happen before returning. A function may block for many reasons: network I/O, disk I/O, mutexes, etc. In fact, every function blocks, at least blocking, consider password hashing functions like bcrypt, which by design use hundreds of milliseconds of CPU time, far more than a typical network or disk access). A function can be blocking in some respects

. . . . . . . . . . . . . . . . . . . . . . . . . 29 6 Mathematical Operations and Elementary Functions 30 6.1 Arithmetic Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Annotated Strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 9 Functions 72 9.1 Argument Passing Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Keyword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 9.4 Operators Are Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 9.5 Operators With Special Names

. . . . . . . . . . . . . . . . . . . . . . . . . 29 6 Mathematical Operations and Elementary Functions 30 6.1 Arithmetic Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Annotated Strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 9 Functions 72 9.1 Argument Passing Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Keyword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 9.4 Operators Are Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 9.5 Operators With Special Names

. . . . . . . . . . . . . . . . . . . . . . . . . 29 6 Mathematical Operations and Elementary Functions 30 6.1 Arithmetic Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Annotated Strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 9 Functions 72 9.1 Argument Passing Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Keyword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 9.4 Operators Are Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 9.5 Operators With Special Names

. . . . . . . . . . . . . . . . . . . . . . . . . 29 6 Mathematical Operations and Elementary Functions 30 6.1 Arithmetic Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Annotated Strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 9 Functions 72 9.1 Argument Passing Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Keyword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 9.4 Operators Are Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 9.5 Operators With Special Names

. . . . . . . . . . . . . . . . . . . . . . . . . 29 6 Mathematical Operations and Elementary Functions 30 6.1 Arithmetic Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Annotated Strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 9 Functions 72 9.1 Argument Passing Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Keyword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 9.4 Operators Are Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 9.5 Operators With Special Names

You can also use IOLoop.run_in_executor to asynchronously run a blocking function on another thread, but note that the function passed to run_in_executor should avoid referencing any Tornado objects. run_in_executor decorated coroutines How it works How to call a coroutine Coroutine patterns Calling blocking functions Parallelism Interleaving Looping Running in the background Queue example - a concurrent web spider Blocking A function blocks when it waits for something to happen before returning. A function may block for many reasons: network I/O, disk I/O, mutexes, etc. In fact, every function blocks, at least