On 2022-01-17 03:11, Cameron Simpson wrote:
> On 16Jan2022 20:57, MRAB <pyt...@mrabarnett.plus.com
>>There was a discussion on another forum that mentioned the 'input'
>>function, and it made me wonder whether 'input' should be printing the
>>prompt to stderr instead of stdout.
>>The convention is for normal output to go to stdout and error messages
>>to go to stderr, so if a program needs to ask the user, shouldn't it be
>>using stderr for prompts in order not to mess up the normal output?
> This is a good reason to avoid sending prompts to stdout. But stderr
> isn't necessarily right either. If stderr's attached to a tty (UNIX,
> different techiness for Windows) you could reasonably send to stderr,
> otherwise you might be better opening /dev/tty (if you're allowed to,
> and if you have one). Etc etc.
> There was a long thread in the "Core Development" forum just the other
> day about this, here:
> Have a read.