Raymond Hettinger added the comment:
-0 I could see some use cases for this, dict.fromkeys(contestants,
factory=list), but it adds complexity to a core container API and it starts to
overlap the use cases for collections.defaultdict().
Perhaps set comprehensions should remain the one-obvious-way-to-do-it:
{k : [] for k in contestants}
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assignee: -> rhettinger
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<http://bugs.python.org/issue23372>
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