coroutine

问题 This question already has an answer here : How to use Asynchronous Comprehensions? (1 answer) Closed 2 years ago . I am using Python 3.5, which, according to PEP 492 should have access to the async with syntax, yet I get a SyntaxError when I try to use it. What am I doing wrong? In [14]: sys.version Out[14]: '3.5.2 (default, Oct 11 2016, 04:59:56) \n[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.38)]' In [15]: async with aiohttp.ClientSession() as session: File "<ipython-input-15

问题 I was wondering whether Lua has any preemptive multitasking facilities built-in. I would like to have concurrent threads to use on my multi-core system. I looked into coroutines (see lua-users.org/wiki/CoroutinesTutorial and stackoverflow.com/questions/3107165/there-is-a-type-named-thread-in-lua-does-anyone-know-something-of-this), but it seems not to fit the bill. I wrote the following code: function foo(ver) local iter = 1; while true do print("foo ver="..ver.." iter="..iter); iter = iter +

问题 I was wondering whether Lua has any preemptive multitasking facilities built-in. I would like to have concurrent threads to use on my multi-core system. I looked into coroutines (see lua-users.org/wiki/CoroutinesTutorial and stackoverflow.com/questions/3107165/there-is-a-type-named-thread-in-lua-does-anyone-know-something-of-this), but it seems not to fit the bill. I wrote the following code: function foo(ver) local iter = 1; while true do print("foo ver="..ver.." iter="..iter); iter = iter +

问题 I'm transitioning from old-style coroutines (where 'yield' returns a value supplied by 'send', but which are otherwise essentially generators) to new-style coroutines with 'async def' and 'await'. There are a couple of things that really puzzle me. Consider the following old-style coroutine that computes the running average of numbers supplied to it by 'send', at each point returning the mean-so-far. (This example is from Chapter 16 of Fluent Python by Luciano Ramalho.) def averager(): total

问题 For example,this view.When the onDetachedFromWindow invoke the scope is cancelled,but the launched job is still active. class TestView : FrameLayout,CoroutineScope { val TAG = "TestView" override val coroutineContext: CoroutineContext get() = Dispatchers.Main + Job() constructor(context: Context) : super(context) constructor(context: Context, attrs: AttributeSet?) : super(context, attrs) { launch { while (true) { Log.i(TAG,"is in launch coroutine....${coroutineContext} ${this@TestView

问题 For example,this view.When the onDetachedFromWindow invoke the scope is cancelled,but the launched job is still active. class TestView : FrameLayout,CoroutineScope { val TAG = "TestView" override val coroutineContext: CoroutineContext get() = Dispatchers.Main + Job() constructor(context: Context) : super(context) constructor(context: Context, attrs: AttributeSet?) : super(context, attrs) { launch { while (true) { Log.i(TAG,"is in launch coroutine....${coroutineContext} ${this@TestView

问题 What is a coroutine? How are they related to concurrency? 回答1: Coroutines and concurrency are largely orthogonal. Coroutines are a general control structure whereby flow control is cooperatively passed between two different routines without returning. The 'yield' statement in Python is a good example. It creates a coroutine. When the 'yield ' is encountered the current state of the function is saved and control is returned to the calling function. The calling function can then transfer

问题 What is a coroutine? How are they related to concurrency? 回答1: Coroutines and concurrency are largely orthogonal. Coroutines are a general control structure whereby flow control is cooperatively passed between two different routines without returning. The 'yield' statement in Python is a good example. It creates a coroutine. When the 'yield ' is encountered the current state of the function is saved and control is returned to the calling function. The calling function can then transfer

问题 This is what I try to do, When I click on a UI Element, the camera smoothly rotate (to look at the target) and simultaneously move on top of the target. To perform that I use a two Coroutine one for the Lerp Position and the other one for the Slerp Rotation. The issue is that the rotation doesn't work correctly, normally the camera should look down to see the top of the target but instead of doing this it look like the Camera first look at the target and after that move to his position. I

问题 In an IPython terminal, I want a function deep in main() to go back to IPython, where I can print, set ... as usual, then keep running main() : IPython run main.py ... def callback( *args ): ... try: back_to_ipython() # <-- how to do this ? In[]: print, set *args ... ... except KeyboardInterrupt: # or IPython magic pass return # from callback(), keep running main() This must run in python2. (The name callback could be anything , but my use case is scipy.optimize -> callback. Perhaps some