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

MRAB python at mrabarnett.plus.com
Wed Feb 13 18:33:05 CET 2013


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.



More information about the Python-Dev mailing list