Why there are not any real lightweight threads for python?

I'm new to Python and seems that the multiprocessing and threads module are not very interesting 开发者_如何学Pythonand suffer from the same problems such as threads in Perl. Is there a technical reason why the interpreter can't use lightweight threads such as posix threads to make an efficient thread implementation that really runs on several cores?

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It is using POSIX threads. The problem is the GIL.

Note that the GIL is not part of the Python spec --- it's part of the CPython reference implementation. Jython, for example, does not suffer from this problem.

That said, looked into Stackless ?

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Piotr,

You might want to take a look at stackless (http://www.stackless.com/) which is a modified version of python running lightweight tasklets in message passing (erlang style) fashion.

I'm not sure if you're looking for a multicore solution, but poking around in stackless might give you what you're looking for.

Ben