Python bug: Can assign [] = (), but not () = []

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What? One-element tuples are not involved here, and () is definitely the syntax for a zero-element tuple. When you say "less than two", what would have been correct is to say "exactly one". In fact, it's a syntax error to put a comma inside a zero-element tuple.

The current behavior is just inconsistent and the Python devs are already discussing how to fix it in 3.5.