What about something like:

f"{x:₹d}"

₹ = Indian Rupees symbol

I realize it is not ASCII but ₹ would be, for the target audience,
 both easy to type
(Ctrl-Alt-4 on Windows Indian English keyboard layout)
 and be mnemonic
("format number like you would format an amount in rupees").

Stephan


2018-02-01 6:11 GMT+01:00 Nick Coghlan <ncogh...@gmail.com>:

> On 1 February 2018 at 14:11, Nick Coghlan <ncogh...@gmail.com> wrote:
> > On 1 February 2018 at 08:14, Eric V. Smith <e...@trueblade.com> wrote:
> >> On 1/29/2018 2:13 AM, Nick Coghlan wrote:
> >>> Given the example, I think a more useful approach would be to allow an
> >>> optional digit grouping specifier after the comma separator, and allow
> >>> the separator to be repeated to indicate non-uniform groupings in the
> >>> lower order digits.
> >>>
> >>> If we did that, then David's example could become:
> >>>
> >>>      >>> print(f"In European format x is {x:,.2f}, in Indian format it
> >>> is {x:,2,3.2f}")
> >>
> >>
> >> This just seems too complicated to me, and is overgeneralizing. How
> many of
> >> these different formats would ever really be used? Can you really expect
> >> someone to remember what that means by looking at it?
> >
> > Sure - "," and "_" both mean "digit grouping", the numbers tell you
> > how large the groups are from left to right (with the leftmost group
> > size repeated as needed), and a single "," means the same thing as
> > ",3," for decimal digits, and the same thing as ",4," for binary,
> > octal, and hexadecimal digits.
>
> Slight correction here, since the comma-separator is decimal only:
>
> - "," would be short for ",3," with decimal digits
> - "_" would be short for "_3_" with decimal digits
> - "_" would be short for "_4_" with binary/octal/hexadecimal digits
>
> Cheers,
> Nick.
>
> --
> Nick Coghlan   |   ncogh...@gmail.com   |   Brisbane, Australia
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