[Python-Dev] Example for PEP 343

[Delaney, Timothy C (Timothy)]

Bob Ippolito wrote:

>> One more thought:  Rather than just saving the precision, it is
>> likely wiser, safer, and more general to just save and restore the
>> whole context and let the wrapped block only work with a copy.
>> 
>>     oldcontext = decimal.getcontext()
>>     newcontext = oldcontext.copy()
>>     newcontext.prec += 2
>>     yield None
>>     decimal.setcontext(oldcontext)
>> 
>> This approach defends against various kinds of unruly behavior by the
>> yield target.
> 
> I think you're missing a decimal.setcontext(newcontext) before the
> yield..

Seems to me this should be in the standard library ;)

Tim Delaney