bpo-38558: Mention `:=` in conditions tutorial (GH-16919)

diff --git a/Doc/tutorial/datastructures.rst b/Doc/tutorial/datastructures.rst
index a0d56274fd7e83a8f1d9d3be86de7ebb8a3c88af..2f7afb088f3bbbffe6aee9d9975163f17e000204 100644 (file)
--- a/Doc/tutorial/datastructures.rst
+++ b/Doc/tutorial/datastructures.rst
@@ -675,10 +675,10 @@ to a variable.  For example, ::
    >>> non_null
    'Trondheim'
 
-Note that in Python, unlike C, assignment cannot occur inside expressions. C
-programmers may grumble about this, but it avoids a common class of problems
-encountered in C programs: typing ``=`` in an expression when ``==`` was
-intended.
+Note that in Python, unlike C, assignment inside expressions must be done
+explicitly with the walrus operator ``:=``. This avoids a common class of
+problems encountered in C programs: typing ``=`` in an expression when ``==``
+was intended.
 
 
 .. _tut-comparing: