[Tutor] Changing the interpreter prompt symbol from ">>>" to ???

[boB Stepp]

On Fri, Mar 11, 2016 at 9:31 PM, boB Stepp <robertvstepp at gmail.com> wrote:

> Python 3.5.1 (v3.5.1:37a07cee5969, Dec  6 2015, 01:54:25) [MSC v.1900
> 64 bit (AMD64)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import sys
>>>> sys.ps1 = '=>'
> =>sys.ps1 = chr(26)
> →sys.ps1 = chr(16)
> ►
>
> I personally like the last of these.  My question is, will this show
> up as a black, filled-in arrowhead pointing to the right on everyone's
> email?  I have yet to delve into Unicode display issues, but I have
> vague recollections that the old ASCII table values might not always
> display the same thing from one person's display to another one's.  Is
> this correct?

There looks to be the potential for problems.  I tried:

►for i in range(256):
...     try:
...             print(str(i) + ': ' + chr(i))
...     except UnicodeEncodeError as e:
...             print(e)

which gave in some sections:

126: ~
127: 
'charmap' codec can't encode character '\x80' in position 5: character
maps to <undefined>
'charmap' codec can't encode character '\x81' in position 5: character
maps to <undefined>

So how reliable is the chr(16) character on people's displays?

boB