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Merge Eric's proposal into proposal II.

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Raymond Hettinger 2009-03-13 02:55:13 +00:00
parent 6daa393c3a
commit 3612e2a2a3
1 changed files with 16 additions and 38 deletions
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pep-0378.txt
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@ -119,23 +119,29 @@ and decimal point::
format(1234.5, "08,.1f") --> '01,234.5'
Proposal II (to meet Antoine Pitrou's request)
==============================================
Proposal II (from Eric Smith)
=============================
Make both the thousands separator and decimal separator user
specifiable but not locale aware. For simplicity, limit the
choices to a comma, period, space, or underscore.
choices to a COMMA, DOT, SPACE, or UNDERSCORE.
[[fill]align][sign][#][0][width][T[tsep]][dsep precision][type]
Whenever the separator is followed by a precision, it is a
decimal separator and the optional separator preceding it is a
thousands separator. When the precision is absent, the
context is integral and a lone specifier means a thousands
separator::
[[fill]align][sign][#][0][width][tsep|([tsep] dsep precision)][type]
Examples::
format(1234, "8.1f") --> ' 1234.0'
format(1234, "8,1f") --> ' 1234,0'
format(1234, "8T.,1f") --> ' 1.234,0'
format(1234, "8T ,f") --> ' 1 234,0'
format(1234, "8d") --> ' 1234'
format(1234, "8T,d") --> ' 1,234'
format(1234, "8.1f") --> ' 1234.0'
format(1234, "8,1f") --> ' 1234,0'
format(1234, "8.,1f") --> ' 1.234,0'
format(1234, "8 ,f") --> ' 1 234,0'
format(1234, "8d") --> ' 1234'
format(1234, "8,d") --> ' 1,234'
This proposal meets mosts needs (except for people wanting
grouping for hundreds or ten-thousands), but it comes at the
@ -150,34 +156,6 @@ length including the thousands separators and decimal separators.
No change is proposed for the locale module.
Proposal III (from Eric Smith: like II but without the T)
=========================================================
In the second proposal, the *T* isn't strictly necessary.
In the context of an integer, an optional single specifier means
a thousands separator. In the context of a float, a single
specifier is a decimal separator while two specifiers are taken
as a thousands separator and a decimal separator::
[[fill]align][sign][#][0][width][tsep][dsep precision][type]
Examples::
format(1234, "8.1f") --> ' 1234.0'
format(1234, "8,1f") --> ' 1234,0'
format(1234, "8.,1f") --> ' 1.234,0'
format(1234, "8 ,f") --> ' 1 234,0'
format(1234, "8d") --> ' 1234'
format(1234, "8,d") --> ' 1,234'
This is a cleaner looking syntax but has the minor disadvantage of
using context to direct the translation. Whenever the separator
is followed by a precision, it is a decimal separator and the separator
preceding it is a thousands separator. When the precision is
absent, the context is integral and a lone specifier means
a thousands separator.
Other Ideas
===========