[Python-checkins] r62376 - peps/trunk/pep-3127.txt

[eric.smith]

Author: eric.smith
Date: Fri Apr 18 20:46:07 2008
New Revision: 62376

Log:
Removed %b formatting from string % operator.  Because
% formatting will be deprecated in favor of str.format(),
we don't want to be adding features it.


Modified:
   peps/trunk/pep-3127.txt

Modified: peps/trunk/pep-3127.txt
==============================================================================
--- peps/trunk/pep-3127.txt	(original)
+++ peps/trunk/pep-3127.txt	Fri Apr 18 20:46:07 2008
@@ -128,13 +128,14 @@
 Output formatting
 -----------------
 
-The string (and unicode in 2.6) % operator will have
-'b' format specifier added for binary in both 2.6 and 3.0.
-In 3.0, the alternate syntax of the 'o' option will need to
-be updated to add '0o' in front, instead of '0'.  In 2.6,
-alternate octal formatting will continue to add only '0'.
-
-PEP 3101 already supports 'b' for binary output.
+In 3.0, the string % operator alternate syntax for the 'o'
+option will need to be updated to add '0o' in front,
+instead of '0'.  In 2.6, alternate octal formatting will
+continue to add only '0'.  In neither 2.6 nor 3.0 will
+the % operator support binary output.  This is because
+binary output is already supported by PEP 3101
+(str.format), which is the prefered string formatting
+method.
 
 
 Transition from 2.6 to 3.0
@@ -437,9 +438,9 @@
 with the "x" for "heXadecimal".
 
 For the string % operator, "o" was already being used to denote
-octal, and "b" was not used for anything, so this works out
-much better than, for example, using "c" (which means "character"
-for the % operator).
+octal.  Binary formatting is not being added to the % operator
+because PEP 3101 (Advanced String Formatting) already supports
+binary, % formatting will be deprecated in the future.
 
 At the end of the day, since uppercase "O" can look like a zero
 and uppercase "B" can look like an 8, it was decided that these
@@ -465,7 +466,7 @@
 and there would need to be a consensus that there is a valid
 use-case for the "alternate form" of the string % operator
 to support uppercase 'B' or 'O' characters for binary or
-octal output.  Currently, PEP3101 does not even support this
+octal output.  Currently, PEP 3101 does not even support this
 alternate capability, and the hex() function does not allow
 the programmer to specify the case of the 'x' character.