On Fri, 14 Jan 2005, Terry Carroll wrote:
> > class _macroString(object):
> > def __init__(self,s):
> > self.macro=s
> > self.list=self.macro.split("\n")
> > for n,v in enumerate(self.list):
> > self.list[n]=v+'\n'
>
> Is this for loop a safe technique, where the list you're enumerating
> over in the for statement is the same as the one being updated in the
> loop body? I always avoid things like that.
Hi Terry,
The 'for' loop itself should be ok, as it isn't a change that causes
elements to shift around. The Reference Manual tries to explain the issue
on in-place list mutation here:
http://docs.python.org/ref/for.html
So as long as the structure of the list isn't changing, we should be ok to
do mutations on the list elements.
Best of wishes!
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