Issue 6037: MutableSequence.__iadd__ should return self.

Issue 6037: MutableSequence.iadd should return self.
fceb5d47 · Raymond Hettinger · 07bbfcc5 · fceb5d47
Commit fceb5d47 authored May 18, 2009 by Raymond Hettinger
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Lib/_abcoll.py Lib/_abcoll.py +1 -0

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--- a/Lib/_abcoll.py
+++ b/Lib/_abcoll.py
@@ -560,5 +560,6 @@ class MutableSequence(Sequence):

    def __iadd__(self, values):
        self.extend(values)
+        return self

 MutableSequence.register(list)