Fix nth() itertool recipe.
(backport from rev. 52497)
diff --git a/Doc/lib/libitertools.tex b/Doc/lib/libitertools.tex
index 20bbc8d..59fbd98 100644
--- a/Doc/lib/libitertools.tex
+++ b/Doc/lib/libitertools.tex
@@ -474,8 +474,8 @@
return izip(mapping.iterkeys(), mapping.itervalues())
def nth(iterable, n):
- "Returns the nth item"
- return list(islice(iterable, n, n+1))
+ "Returns the nth item or raise IndexError"
+ return list(islice(iterable, n, n+1))[0]
def all(seq, pred=None):
"Returns True if pred(x) is true for every element in the iterable"