On 24/03/2016 14:34, Jussi Piitulainen wrote:
BartC writes:
On 24/03/2016 14:08, Jon Ribbens wrote:
On 2016-03-24, BartC wrote:
I'd presumably have to do:
for i in range(len(L)):
L[i]=0
That's kind've a weird thing to want to do;
The thing I'm trying to demonstrate is changing an element of a list
that you are traversing in a loop. Not necessarily set all elements to
the same value.
You understand correctly, but it may be more natural in practice to
write it this way:
for k, item in enumerate(them):
them[k] = f(item)
I _think_ I might write it that way even when "f(item)" does not depend
on the old value at all, but I don't expect to be in that situation.
Yes, you're right. Usually the update is conditional on the existing
value. But my too-simple example would have had an unneeded item variable.
--
Bartc
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