[Python-ideas] Pipe indentation

[Stephen J. Turnbull]

Chris Angelico writes:
 > On Tue, Dec 10, 2013 at 4:21 PM, Stephen J. Turnbull <stephen at xemacs.org> wrote:
 > > Christopher Welborn writes:
 > >
 > >  > Here's a link to a screen shot that shows Sublime Text's nesting level
 > >  > lines:
 > >
 > >  > http://imgur.com/yRGNCKu
 > >
 > >  > ...a lot of editors do this, tab or space.
 > >
 > > But do they get it Pythonically correct?  Ie, in counting indentation,
 > > 1 TAB = 1 SPC, regardless of what it looks like on screen.

Oops, that's TAB = SPC*8 in Python 2.

 > SciTE gets it Python3ically correct: tab != space regardless of
 > number.

But what does that mean?  How does SciTE distinguish between "SPC TAB"
at the beginning of line and just "TAB"?  Where does it place guidelines
given

def f(x):
SPC if x:
SPC SPC print("gotcha")
SPC else:
SPC TAB print("gotcha again")

which is acceptable to Python 3.3?  I suppose the right answer, as
usual, is "don't use both spaces and tabs for indentation in the same
program", but I guess then it really doesn't matter how the editor
handles tabs and spaces.

Oh, BTW, I'm definitely -1 on "pipe indentation" in the source
program, since editors can clearly do it if you want it (I don't)
whether it's present in the source, or not.