Sorry, I was not as clear as I ought to have been:
On Sat, Feb 02, 2019 at 02:10:06PM +1100, Steven D'Aprano wrote:
> > * Clear separation (using, for example, different colors)
> > between input, output and errors;
>
> Input always starts with a prompt; exception tracebacks always start
> with the line "Traceback..."; other errors are generally not
> programmatically distinguishable from non-errors.
By which I mean, if a script or module reports an error by just printing
a message to the screen:
print("sorry, an error occurred")
sort of thing. Obviously the interpreter cannot guess which messages
represent errors in that sense and which are non-error output.
(Of course, a script could format its own error messages, say by using
terminal-specific colour codes.)
--
Steve
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