[Fredrik Lundh]
Brett Cannon wrote:
try: import threading except ImportError: threading = None # use non-threaded behaviour
But if it does it will be on platforms it couldn't run on previously.
Sigh. Let's try one more time:
Under 2.2 and earlier, on a platform that doesn't support threads, the above code will set threading to None, and the application can then use "if threading is None" to provide application-specific work- arounds.
I get this and always have. I just have not thought of it as huge of an issue as you do. If it is that big of a worry, add a ``import thread; del thread`` statement to make sure ``thread`` is there and warn users not to use the code. But I know you are going to be against the idea of modifying existing code for this, so I am going to let it go. Your point is valid, we just differ on its importance. Is Guido's suggested ``dummy_threading`` okay with you?
(catching import errors is a very common pattern when you're writing portable Python code).
I know, I use it myself.
If you change Python so that "import threading" succeeds also on plat- forms that don't support threads, the application-specific workarounds will no longer be used, and the application may no longer work properly.
And since we're talking deadlocks, chances are that nobody will notice before it's too late.
OK, I am going to concede on this and stop pushing for it. Let me know what you think of Guido's ``dummy_threading`` idea. I assume you don't object to changing ``Queue``, though, right? -Brett