Status of side-effecting functions in python

[Terry Reedy]

On 10/25/2014 6:22 PM, Dan Sommers wrote:
> On Sat, 25 Oct 2014 23:41:52 +0200, Wolfgang Maier wrote:
>
>> ... It may be rare to use an expression both for its side-effects and
>> its return value ...
>
> A lot of concurrency-related operations work that way.  In the old days,
> it was CPU-level Test and Set (or Compare and Set) instructions.  These
> days, we have Python's threading.Lock.acquire.

list.pop and and related set and dict methods.

-- 
Terry Jan Reedy