On Sat, Feb 11, 2017 at 8:53 PM, boB Stepp <robertvst...@gmail.com> wrote:
>
> I suspect Eryk had set a normal 's' as an identifier for the character
> code sequence that produces the non-ASCII output, but forgot to show
> us that step. But I could be mistaken.
Sorry, I forgot to show the assignment of the string "௧꘢୩" to the variable s.
> Today I am working in Windows 7, not Linux Mint. Of course when I
> attempted to copy and paste the non-ASCII sequence from Gmail into
> cmd.exe I got 3 rectangular boxes on the paste line, indicating
> cmd.exe could not translate those characters.
If you're running python.exe, it either inherits or allocates a
console, which is hosted by an instance of conhost.exe. At most you're
inheriting a console from cmd.exe. That's the extent of its
involvement. Think of conhost.exe as a terminal window, like GNOME
Terminal, etc. cmd.exe and powershell.exe are shells that use standard
I/O, much like Python's REPL -- or like running bash in a Unix
terminal.
The console window can handle characters in the basic multilingual
plane (BMP). Python 3.6 uses the console's wide-character (Unicode)
API, so it should have no problem reading the string "௧꘢୩" if typed or
pasted into the console. For example, if it's assigned to `s`, then
ascii(s) should show the correct \u literals:
>>> ascii(s)
"'\\u0be7\\ua622\\u0b69'"
Unfortunately, for rendering text the Windows console has limited font
support. It requires a strictly monospace font, among other criteria.
It won't switch automatically to other fonts when the current font
doesn't have a glyph for a character. It just displays an empty box
glyph. In Windows 7 a good font choice for the console window is
Consolas. It has pretty good coverage for Western languages, but not
for any of the characters in "௧꘢୩".
If you copy the empty-box glyphs from the console window to the
clipboard, it's actually copying the Unicode characters, which can be
pasted into a window that has better font support, such as notepad. So
in 3.6 this is just a superficial rendering issue that can be
addressed by using programs such as ConEmu that replace the standard
console window (it hides the console and hooks the API to write to its
own window).
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