This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author gvanrossum
Recipients arjennienhuis, benjamin.peterson, christian.heimes, eric.smith, exarkun, ezio.melotti, gvanrossum, loewis, martin.panter, pitrou, serhiy.storchaka, terry.reedy, uau, vstinner
Date 2013-01-22.19:32:27
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <>
Well, msg171804 makes it a much bigger project than the feature that Twisted actually needs.  Quoting:

* The default formatting should not use str(), but buffer protocol.

* There is no place for floating point.
Actually they do need it -- and it's trivial to define, since fp only returns ASCII characters.

* There is no place for locale.

* There is no place for 'r' conversion (possible only for 'a').

* It should include the features of struct.pack(), int.to_bytes() and ctypes.
Not needed.

* Padding should be not only by space, but also by zeros (and possibly by other values).
Not needed.

* Alignment (padding to position divisible by some number).
Not needed.

* In addition to padding and truncating should be the ability to raise an exception in case of discrepancy between the needed and actual lengths.
Not needed.

* It unlikely needed attribute access and indexing.
I don't know, but these features certainly would be well-defined.

* Builtin format() should not work with this.

Probably bytes.format() should not try to call v.__format__(); if an extension mechanism is needed it would be called something else, but given the limited set of types needed I think this can be skipped.

The most important requirement from Twisted is actually that it is called .format(), and that the overall format strings look like they did for 8-bit string formatting in Python 2.  In particular b'a{}b{}c'.format(x, y), where x and y are bytes, should be equivalent to b'a' x + b'b' + y + b'c'.
Date User Action Args
2013-01-22 19:32:28gvanrossumsetrecipients: + gvanrossum, loewis, terry.reedy, exarkun, pitrou, vstinner, eric.smith, christian.heimes, benjamin.peterson, ezio.melotti, arjennienhuis, uau, martin.panter, serhiy.storchaka
2013-01-22 19:32:28gvanrossumsetmessageid: <>
2013-01-22 19:32:28gvanrossumlinkissue3982 messages
2013-01-22 19:32:27gvanrossumcreate