[Python-Dev] RFC: PEP 460: Add bytes % args and bytes.format(args) to Python 3.5

[Daniel Holth]

+1

I have always been delighted that it is possible to manipulate binary
data in Python using string operations. It's not just immoral
non-Unicode text processing. A poor man's ASN.1 generator is an
example of a very non-text thing that might be convenient to write
with a few %s fill-in-the-blanks.

Isn't it true that if you have bytes > 127 or surrogate escapes then
encoding to latin1 is no longer as fast as memcpy?

On Tue, Jan 7, 2014 at 8:22 AM, Serhiy Storchaka <storchaka at gmail.com> wrote:
> Most popular formatting codes in Mercurial sources:
>
>    2519 %s
>     493 %d
>     102 %r
>      48 %Y
>      47 %M
>      41 %H
>      39 %S
>      38 %m
>      33 %i
>      29 %b
>      23 %ld
>      19 %ln
>      12 %.3f
>      10 %a
>      10 %.1f
>       9 %(val)r
>       9 %p
>       9 %.2f
>       8 %I
>       6 %n
>       5 %(val)s
>       5 %.0f
>       5 %02x
>       4 %f
>       4 %c
>       4 %12s
>       3 %(user)s
>       3 %(id)s
>       3 %h
>       3 %(bzdir)s
>       3 %0.2f
>       3 %02d
>
>
>
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