[Python-Dev] Usage of += on strings in loops in stdlib (original) (raw)

Maciej Fijalkowski fijall at gmail.com
Wed Feb 13 19:06:09 CET 2013


On Wed, Feb 13, 2013 at 7:33 PM, MRAB <python at mrabarnett.plus.com> wrote:

On 2013-02-13 13:23, Lennart Regebro wrote:

On Wed, Feb 13, 2013 at 1:10 PM, Serhiy Storchaka <storchaka at gmail.com> wrote:

I prefer "x = '%s%s%s%s' % (a, b, c, d)" when string's number is more than 3 and some of them are literal strings. This has the benefit of being slow both on CPython and PyPy. Although using .format() is even slower. :-) How about adding a class method for catenation: str.cat(a, b, c, d) str.cat([a, b, c, d]) # Equivalent to "".join([a, b, c, d]) Each argument could be a string or a list of strings.


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I actually wonder.

There seems to be the consensus to avoid += (to some extent). Can someone commit the change to urrllib then? I'm talking about reverting http://bugs.python.org/issue1285086 specifically



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