[Python-ideas] Format mini-language for lakh and crore

Nick Coghlan ncoghlan at gmail.com
Sun Jan 28 06:51:05 EST 2018

On 28 January 2018 at 19:30, Stephan Houben <stephanh42 at gmail.com> wrote:
> Hi David,
> Perhaps the "n" locale-dependent number formatting specifier
> should accept a , to have locale-appropriate formatting of thousand
> separators?
> f"{x:,n}"
> would Do The Right Thing(TM) depending on the locale.

Checking https://www.python.org/dev/peps/pep-0378/, we did suggest
using the locale module for cases where the engineering style
groups-of-three structure wasn't appropriate, with the parallel being
drawn to the fact that you also need to use locale dependent
formatting to get a decimal separator other than ".".

One nice aspect of this suggestion is that supplying the comma would
map directly to the "grouping" parameter in

    >>> import locale
    >>> locale.setlocale(locale.LC_ALL, "en_IN.utf8")
    >>> locale.format("%d", 10e9, grouping=True)


Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia

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