[Python-ideas] Have REPL print less by default
Terry Reedy
tjreedy at udel.edu
Wed Apr 20 15:24:42 EDT 2016
On 4/20/2016 2:15 PM, Random832 wrote:
> On Wed, Apr 20, 2016, at 13:57, Koos Zevenhoven wrote:
>> On Wed, Apr 20, 2016 at 8:46 PM, Terry Reedy <tjreedy at udel.edu> wrote:
>>> On 4/20/2016 6:39 AM, Koos Zevenhoven wrote:
>>>> def fun():
>>>> fun()
>>>>
>>>> fun()
>>>>
>>>> Does that.
>>>
>>>
>>> The above produces pairs of lines, so I do not understand your point.
>>>
>>
>> Strange. for me it produces a repeating single line. Tried both on
>> 2.7.6. and 3.5.1. Probably not worth discussing, though.
>
> It produces single lines in the interactive interpreter, pairs in a
> file.
Aha. In IDLE's Shell, which generally simulates the interactive
interpreter quite well, pairs are printed because interactive user input
is exec'ed in a process running Python in normal batch mode. I expect
any GUI shell to act similarly.
I consider interactive interpreter omission of the line at fault to be a
design buglet. For a single line of input, it is not much of a problem
to look back up. But if one pastes a 20-line statement, finding line
13, for instance, is not so quick. And on Windows, a 1000 line
traceback may erase the input so there is nothing to look at.
--
Terry Jan Reedy
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