Python handles globals badly.

Mark Lawrence breamoreboy at yahoo.co.uk
Tue Sep 8 11:22:28 CEST 2015


On 08/09/2015 09:59, Antoon Pardon wrote:
> Op 04-09-15 om 02:47 schreef Mark Lawrence:
>> On 04/09/2015 01:06, Michael Torrie wrote:
>>> On 09/03/2015 01:05 PM, tdev at freenet.de wrote:
>>>
>>>> [The same e.g. with switch statement: add it]
>>>
>>> Switch is a nice-to-have thing, but definitely not essential. A PEP here
>>> (probably already has been several) would at least be read anyway.
>>> However, there are several idiomatic ways of accomplishing the same
>>> thing that are often good enough and familiar to any Python programmer
>>> out there.  Since functions are first-class objects, often a dispatch
>>> table is the best way to go here.
>>>
>>
>> https://www.python.org/dev/peps/pep-3103/ "A Switch/Case Statement" by
>> Guido van Rossum, "Rejection Notice - A quick poll during my keynote
>> presentation at PyCon 2007 shows this proposal has no popular support.
>> I therefore reject it".
>>
>> https://www.python.org/dev/peps/pep-0275/ "Switching on Multiple
>> Values" by Marc-André Lemburg, "Rejection Notice - A similar PEP for
>> Python 3000, PEP 3103 [2], was already rejected, so this proposal has
>> no chance of being accepted either."
>>
> Were those polls, like the poll he once did for the condtional expression?

Polls, there is only one referred to above?

> There the poll indicated no specific proposal had a majority, so for each
> specific proposal one could say it didn't have popular support, but the
> majority still prefered to have a conditional expression. But at that
> time Guido used that poll as an indication there was not enough support.
>
> So colour me a bit sceptical when Guido comes with such a poll.
>

In that case there were either two different polls, or one of us is 
mistaken, as I was very much under the impression that as there was no 
clear winner for a conditional expression, but a majority wanted one, 
Guido simply picked the one he favoured.  Hum, IIRC that was backed up 
by an analysis of the standard library.

-- 
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence



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