[Python-ideas] Coroutines and PEP 380

[Paul Moore]

On 26 January 2012 02:08, Matt Joiner <anacrolix at gmail.com> wrote:
> Implicit coroutines can arbitrary switch without changes in syntax,
> calling convention, or traversing back up the stack.
[...]
> * Are not preempted,

That's what confuses me. If an implicit coroutine can arbitrarily
switch without changes in syntax, etc, how is it not pre-empted? How
does the switch happen, if not by pre-emption or by some explicit
request/syntax?

An example of what you mean would probably help.

Paul