copying a string???
mwh at python.net
Thu Aug 22 15:20:58 CEST 2002
Joe Connellan <joec at mill.co.uk> writes:
> I have a function that alters the value of a string (written in
> C). (is that bad?)
> in the following code
> str1 = "hi there"
> str2 = copy.deepcopy(str1)
> changeString() changes both str2 and str1, where I only want it to
> change str2 - hence the deepcopy().
> I have also tried these
> str2 = copy.copy(str1)
> str2 = str1
> does deepcopy just assume that becuase a string doesn't support
> assignment it can reference rather than copy it?
Note that "string doesn't support assignment" sounds confused.
It doesn't support item or slice assignment.
But, to answer your question, yes.
> anyone know how I can really copy the string?
Not off the top of my head.
> or am I missing something above?
Yes: strings are immutable. Lots of things rely on this. Expect
arbitrary breakage as a result of mutating them.
Good? Bad? Strap him into the IETF-approved witch-dunking
apparatus immediately! -- NTK now, 21/07/2000
More information about the Python-list