How can you copy (clone) a string?

[Bernhard Herzog]

Martin von Loewis <loewis at informatik.hu-berlin.de> writes:

> blablu at gmx.net (Mike 'Cat' Perkonigg) writes:
> 
> > There seem to be a good optimization :-)
> 
> That's the 'strings of length 1' optimization; Python has an array of
> 256 string. The empty string is also a singleton.
> 
> In addition, you have the interned strings which are created in
> certain cases.

But string slices that would result in a copy of the whole string are
also optimized themselves:

>>> s = "abc" + chr(64)
>>> s
'abc@'
>>> t = s[:]
>>> s is t
1


a possible solution for the problem if the string is at least two
characters long:

>>> t = s[:1] + s[1:]
>>> s is t
0



-- 
Bernhard Herzog   | Sketch, a drawing program for Unix
herzog at online.de  | http://sketch.sourceforge.net/