On Mar 11, 2009, at 9:06 PM, Nick Coghlan wrote: > Raymond Hettinger wrote: >> The current formatting mini-language provisions left/right/center >> alignment, prefixes for 0b 0x 0o, and rules on when to show the >> plus-sign. I think it would be far more useful to provision a simple >> way of specifying a thousands separator. >> >> Financial users in particular find the locale approach to be >> frustrating >> and non-obvious. Putting in a thousands separator is a common task >> for >> output destined to be read by non-programmers. > > +1 for the general idea. > > A specific syntax proposal: > > [[fill]align][sign][#][0][minimumwidth][,sep][.precision][type] > > 'sep' is the new field that defines the thousands separator. It > appears > immediately before the precision specifier and starts with a leading > comma. > > I believe this syntax is unambiguous and backwards compatible because > the only other place a comma might appear (the fill field) is required > to be followed by an alignment character. You might be interested to know that in India, the commas don't come every 3 digits. In india, they come every two digits, after the first three. Thus one billion = 1,00,00,00,000. How are you gonna represent *that* in a formatting mini-language? :) See also http://en.wikipedia.org/wiki/Indian_numbering_system James
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