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-rw-r--r--Lib/doctest.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/doctest.py b/Lib/doctest.py
index bc30a1a..0f40818 100644
--- a/Lib/doctest.py
+++ b/Lib/doctest.py
@@ -98,7 +98,7 @@ import __future__
import sys, traceback, inspect, linecache, os, re
import unittest, difflib, pdb, tempfile
import warnings
-from StringIO import StringIO
+from io import StringIO
# There are 4 basic classes:
# - Example: a <source, want> pair, plus an intra-docstring line number.