Merge 60627.

017b6a3a · Raymond Hettinger · 55285ef4 · 017b6a3a
Commit 017b6a3a authored Feb 07, 2008 by Raymond Hettinger
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Lib/_abcoll.py Lib/_abcoll.py +6 -1

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--- a/Lib/_abcoll.py
+++ b/Lib/_abcoll.py
@@ -170,7 +170,12 @@ class Set:

    @classmethod
    def _from_iterable(cls, it):
-        return frozenset(it)
+        '''Construct an instance of the class from any iterable input.
+
+        Must override this method if the class constructor signature
+        will not accept a frozenset for an input.
+        '''
+        return cls(frozenset(it))

    def __and__(self, other):
        if not isinstance(other, Iterable):