Introduce copy by slicing, used in later chapters.

diff --git a/Doc/tutorial/introduction.rst b/Doc/tutorial/introduction.rst
index 1d67ed3df022cc93918edef56a6efee920f4de17..c953394e5d17d9d7fc72db062e1960d49ba06d45 100644 (file)
--- a/Doc/tutorial/introduction.rst
+++ b/Doc/tutorial/introduction.rst
@@ -523,6 +523,12 @@ concatenated and so on::
    >>> 3*a[:3] + ['Boo!']
    ['spam', 'eggs', 100, 'spam', 'eggs', 100, 'spam', 'eggs', 100, 'Boo!']
 
+All slice operations return a new list containing the requested elements.  This
+means that the following slice returns a shallow copy of the list *a*::
+
+   >>> a[:]
+   ['spam', 'eggs', 100, 1234]
+
 Unlike strings, which are *immutable*, it is possible to change individual
 elements of a list::