What is the most pythonic way to build up large strings?
steve+comp.lang.python at pearwood.info
Sat Feb 8 12:06:24 CET 2014
On Sat, 08 Feb 2014 01:56:46 -0800, cstrutton11 wrote:
> On Saturday, February 8, 2014 3:13:54 AM UTC-5, Asaf Las wrote:
>> note, due to strings are immutable - for every line in sum operation
>> above you produce new object and throw out older one. you can write
>> one string spanned at multiple lines in very clear form.
> I get what your saying here about immutable strings. Is there anyway
> efficiently build large strings with lots of conditional inclusions,
> repetative sections built dynamically by looping (see the field section
Yes. Build up all the substrings individually, storing them in a list.
Then, when you are ready to actually use the string, assemble it in one
substrings = 
for x in whatever():
> Is there a mutable string class?
No. Well, actually there is, but it's a toy, and operates under the hood
by creating new immutable strings, so there's no point using it. It may
even have been removed from more recent versions of Python.
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