Added a tutorial note and example regarding the scope of loop variables
in a list comprehension. Includes a justification and a comparision
to regular for-loops.
Closes SF bug 605047.
diff --git a/Doc/tut/tut.tex b/Doc/tut/tut.tex
index 1990ab8..512dd6e 100644
--- a/Doc/tut/tut.tex
+++ b/Doc/tut/tut.tex
@@ -1862,6 +1862,19 @@
[8, 12, -54]
\end{verbatim}
+To make list comprehensions match the behavior of \keyword{for}
+loops, assignments to the loop variable remain visible outside
+of the comprehension:
+
+\begin{verbatim}
+>>> x = 100 # this gets overwritten
+>>> [x**3 for x in range(5)]
+[0, 1, 8, 27, 64]
+>>> x
+4 # the final value for range(5)
+>>
+\end{verbatim}
+
\section{The \keyword{del} statement \label{del}}