[Tutor] lists, name semantics

[Bill Allen]

print(b) will print the original copy of a which b now references which is
[1, ["x", "y"], 3]
On Apr 18, 2015 7:50 AM, "Peter Otten" <__peter__ at web.de> wrote:

> Bill Allen wrote:
>
> > Everyone that responded,
> >
> > Thanks very much for the excellent explanations!  The distinction between
> > a reference to an object and a seperate copy of the object is quite clear
> > now.
>
> You can test your newfound knowledge by predicting the output of the
> following script:
>
>
> a = [1, ["x", "y"], 3]
> b = a[:]
>
> a[1][1] = "hello!"
>
> print(a) # [1, ['x', 'hello!'], 3]
> print(b) # what will that print?
>
> Think twice before you answer. What is copied, what is referenced?
>
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